Green synthesis and electrochemical characterization of rGOCuO nanocomposites for supercapacitor applications
Reduced graphene oxide (rGO) were prepared from graphene oxide (GO) by using piperine as a green reducing agent extracted from Piper nigrum. The obtained rGO had few defects and lacked connectivity between the layers. To overcome these defects, copper oxide (CuO) nanoparticles were synthesized ultrasonically and nanocomposites of rGOCuO were prepared. The conductivities of the rGO, CuO and rGOCuO nanocomposites were determined by AC impedance spectroscopy in different electrolytes. Morphology, composition and electronic structure of CuO, rGO and rGOCuO nanocomposites were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photon spectroscopy (XPS) and electrochemical techniques. Transmission electron microscopy (TEM) images portrait CuO as a fish caught in the net of rGO layers. The rGOCuO nanocomposite exhibiting lower resistance and higher capacitance was used in fabrication of supercapacitor electrodes. The specific capacitance of the fabricated supercapacitor was found to be 137Fg?1. The supercapacitor performance of the nanocomposite electrode is attributed to the synergistic effect of double-layer capacitance of rGO and redox capacitance of CuO nanoparticles. [Figure not available: see fulltext.] 2016, Springer-Verlag Berlin Heidelberg.
Sudhakar Y.N.; Hemant H.; Nitinkumar S.S.; Poornesh P.; Selvakumar M.
Sudhakar Y.N., Department of Chemistry, Christ University, Bengaluru, India; Hemant H., Department of Chemistry, Manipal Institute of Technology, Manipal University, Manipal, Karnataka, India; Nitinkumar S.S., Department of Chemistry, Manipal Institute of Technology, Manipal University, Manipal, Karnataka, India; Poornesh P., Department of Physics, Manipal Institute of Technology, Manipal Universiry, Manipal, Karnataka, India; Selvakumar M., Department of Chemistry, Manipal Institute of Technology, Manipal University, Manipal, Karnataka, India
Green Synthesis of ?-Fe2O3 Nanoparticles Mediated Musa Acuminata: A Study of Their Applications as Photocatalytic Degradation and Antibacterial Agent
Antibacterial activity; Green synthesis; Musa acuminata; Photoluminescence and dye degradation; ?-Fe2O3 NPs
The present study was aimed to green synthesize of ?-Fe2O3 nanoparticles (NPs) using flower extract of Musa acuminata and examination of their antibacterial and photocatalytic activities. The synthesized NPs were investigated using UV-visible spectroscopy, which exhibited a colour change pattern, and the maximum absorption peak at 265 nm confirmed the formation of ?-Fe2O3 NPs. The FTIR analysis showed the presence of various functional groups coated over the synthesized ?-Fe2O3 NPs. The XRD pattern showed that the formation of rhombohedral structure with an average crystallite size was 21.86 nm. FESEM micrographs revealed that ?-Fe2O3 NPs were roughly spherical in shape. EDX spectrum confirmed the presence of Fe and O elements. By TEM analysis, the average particle size was calculated to be 32 nm. Using the well diffusion method, the antibacterial activity of ?-Fe2O3 NPs was tested against both gram positive and negative bacterial strains of Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The NPs exhibited good antibacterial activity against the tested bacteria. Finally, the synthesized ?-Fe2O3 NPs demonstrated the photocatalytic degradation of Crystal Violet (CV) dye under sunlight. The efficiency of degradation within 150 min was determined to be 90.27% for CV. This effective removal method under sunlight may support a cost-effective method for degradation of CV dyes from wastewater. Copyright T Indhumathi, N Krishnamoorthy, R. Valarmathy, K Saraswathi, S Dilwyn and S. Prabhu.
Indhumathi T.; Krishnamoorthy N.; Valarmathy R.; Saraswathi K.; Dilwyn S.; Prabhu S.
Nano Biomedicine and Engineering, Vol-14, No. 3, pp. 254-262.
https://doi.org/10.5101/nbe.v14i3.p254-262 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85148249429&doi=10.5101%2fnbe.v14i3.p254-262&partnerID=40&md5=715825a82f4b035b2d4f3daba4e5954c
Indhumathi T., Department of Chemistry, Christ University, Karnataka, Bangalore, India; Krishnamoorthy N., Department of Physics, Sri Eshwar College of Engineering, Tamil N?du, Coimbatore, India; Valarmathy R., Department of Chemistry, Hindusthan College of Engineering and Technology, Tamil N?du, Coimbatore, India; Saraswathi K., Department of Civil Engineering, Hindusthan College of Engineering and Technology, Tamil N?du, Coimbatore, India; Dilwyn S., Department of Food Technology, Hindusthan College of Engineering and Technology, Tamil N?du, Coimbatore, India; Prabhu S., Department of Physics, Hindusthan College of Engineering and Technology, Tamil N?du, Coimbatore, India
Green synthesis of biocompatible L-Histidine-Modified NiFe2O4 Nanoparticles: A multifaceted approach toward cancer and bacterial therapy
Antibacterial activity; Anticancer activity; Biocompatibility; L-histidine functionalization; MDA-MB-231; NiFe2O4; Zebrafish embryo
Cancer and infections caused by microbes remain serious global health threats, with multidrug resistance and toxicity associated with treatment constraining the efficacy of traditional therapies. In the present research, biocompatible L-histidine-functionalized nickel ferrite nanoparticles (NiFe2O4-LH) were green synthesized using of Clitoria ternatea flower extract and systematically evaluated for their therapeutic effects. Characterization established their spinel cubic structure, reduced crystallite size (14.4 nm), and enhanced stability when compared to bare NiFe2O4 (21.6 nm). UVvisible spectra revealed a blue shift with expanded band gap from 3.16 eV (NiFe2O4) to 3.92 eV (NiFe2O4-LH). The PL spectra revealed that the NiFe2O4-LH exhibited green emission at 516, 526 nm suggesting increased oxygen vacancies facilitating ROS production. The NiFe2O4-LH NPs demonstrated excellent antibacterial activity when compared to pure NiFe2O4. SEM analysis confirmed extensive bacterial membrane breakdown when exposed to NiFe2O4-LH. Cytotoxicity to MDA-MB-231 breast cancer cells showed a significant dose-dependent response with an IC50 of 12.41 ?g/mL. Biocompatibility assessments with zebrafish embryos supported negligible development toxicity, wherein NiFe?O?-LH-treated groups preserved normal morphology until 72 hpf compared to the bare NiFe2O4. 2025 Elsevier B.V.
Thangavelu, Indumathi; Tadepalli, Srinivas; Kasibatla, Murthy S.
Journal of Molecular Structure;Volume;1352;Issue;;Article No.;144396;
Restricted Access; Hardcopy may be available in the library
https://doi.org/10.1016/j.molstruc.2025.144396 https://www.scopus.com/pages/publications/105019076957?origin=resultslist
Thangavelu I., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, India; Tadepalli S., Department of Chemical Engineering, College of Engineering, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11432, Saudi Arabia; Kasibatla M.S., Department of Chemistry, Applied Science Cluster, University of Petroleum and Energy Studies, Uttarakhand, Dehradun, 248007, India
Green synthesis of biocompatible sodium alginate-coated bismuth oxide nanoparticles using Bougainvillea glabra flower extract with enhanced activity against pathogenic microorganisms and HT-29 colorectal cancer cells
Anticancer activity; Antimicrobial acitivity; Bismuth oxide; Bougainvillea glabra; Sodium alginate doped bismuth oxide
Colorectal cancer is a leading cause of cancer-related deaths, highlighting the urgent need for effective treatments. Similarly, rising antibiotic resistance emphasizes the demand for new antimicrobial drugs. In response, the present study uses Bougainvillea glabra (B. glabra) as a capping agent to synthesis sodium alginate-doped bismuth oxide (SABO) and environmentally friendly bismuth oxide (BO). SABO exhibited smaller particle size (25 nm) and higher crystallinity compared to BO (42 nm). SEM analysis revealed rock-stone-like morphology with average particle sizes of 42 nm for BO and 25 nm for SABO, indicating smaller and better-dispersed particles in SABO. UVVis DRS analysis showed a red shift in absorbance from 387 nm (BO) to 397 nm (SABO) and a band gap decrease from 2.7 eV to 2.3 eV, suggesting enhanced electronic conductivity and increased reactive oxygen species (ROS) generation. Gram-positive bacteria (S. aureus and S. pneumoniae), Gram-negative bacteria (E. coli and K. pneumoniae), and fungi (C. albicans) were all tested for antibacterial activity using BO and SABO. With minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of 800 and 1000 g/mL, respectively, SABO showed more activity in the zone of inhibition than the other nanoparticles. Furthermore, the anticancer activity of BO and SABO against HT-29 colorectal cancer cells showed greater efficacy for SABO, with a lower IC50 concentration of 8.1 ?g/mL. These findings suggest that SABO could serve as a multifunctional antimicrobial and anticancer agent in the biomedical field. 2026 Elsevier B.V.
Pradeep, Lakshmi; Tadepalli, Srinivas; Thangavelu, Indumathi; Sarma, Rajat Swaminathan; Boopathi, Thalakulam Shanmugam; Gadallah, Abdelrahman G.
Journal of Molecular Structure;Volume;1360;Issue;;Article No.;145565;
https://doi.org/10.1016/j.molstruc.2026.145565 https://www.scopus.com/pages/publications/105029720094?origin=resultslist
Pradeep L., Department of Chemistry, Amrita School of Physical Sciences Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India, Functional Materials Laboratory, Amrita School of Engineering Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India; Tadepalli S., Department of Chemical Engineering, College of Engineering, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11432, Saudi Arabia; Thangavelu I., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, India; Sarma R.S., Department of Chemistry, Amrita School of Physical Sciences Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India, Functional Materials Laboratory, Amrita School of Engineering Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India; Boopathi T.S., Department of Chemistry, Amrita School of Physical Sciences Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India, Functional Materials Laboratory, Amrita School of Engineering Coimbatore, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India; Gadallah A.G., Department of Chemical Engineering, College of Engineering, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11432, Saudi Arabia
Green Synthesis of Bioinspired Nanoparticles Mediated from Plant Extracts of Asteraceae Family for Potential Biological Applications
Asteraceae family; biological activity; characterization; green synthesis; nanoparticle; phytochemicals; toxicity
The Asteraceae family is one of the largest families in the plant kingdom with many of them extensively used for significant traditional and medicinal values. Being a rich source of various phytochemicals, they have found numerous applications in various biological fields and have been extensively used for therapeutic purposes. Owing to its potential phytochemicals present and biological activity, these plants have found their way into pharmaceutical industry as well as in various aspects of nanotechnology such as green synthesis of metal oxide nanoparticles. The nanoparticles developed from the plants of Asteraceae family are highly stable, less expensive, non-toxic, and eco-friendly. Synthesized Asteraceae-mediated nanoparticles have extensive applications in antibacterial, antifungal, antioxidant, anticancer, antidiabetic, and photocatalytic degradation activities. This current review provides an opportunity to understand the recent trend to design and develop strategies for advanced nanoparticles through green synthesis. Here, the review discussed about the plant parts, extraction methods, synthesis, solvents utilized, phytochemicals involved optimization conditions, characterization techniques, and toxicity of nanoparticles using species of Asteraceae and their potential applications for human welfare. Constraints and future prospects for green synthesis of nanoparticles from members of the Asteraceae family are summarized. 2023 by the authors.
Jaison J.P.; Balasubramanian B.; Gangwar J.; James N.; Pappuswamy M.; Anand A.V.; Al-Dhabi N.A.; Valan Arasu M.; Liu W.-C.; Sebastian J.K.
All Open Access; Gold Open Access; Green Open Access
https://doi.org/10.3390/antibiotics12030543 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85151369114&doi=10.3390%2fantibiotics12030543&partnerID=40&md5=b37c85b857939bcf1176d71887b56007
Jaison J.P., Department of Life Sciences, School of Sciences, Christ University, Bangalore, 560029, India; Balasubramanian B., Department of Food Science and Biotechnology, College of Life Science, Sejong University, Seoul, 05006, South Korea; Gangwar J., Department of Life Sciences, School of Sciences, Christ University, Bangalore, 560029, India; James N., Department of Life Sciences, School of Sciences, Christ University, Bangalore, 560029, India; Pappuswamy M., Department of Life Sciences, School of Sciences, Christ University, Bangalore, 560029, India; Anand A.V., Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, 641046, India; Al-Dhabi N.A., Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia; Valan Arasu M., Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia; Liu W.-C., Department of Animal Science, College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China; Sebastian J.K., Department of Life Sciences, School of Sciences, Christ University, Bangalore, 560029, India
Green synthesis of Cobalt Oxide nanoparticles with in-vitro cytotoxicity assessment using pomegranate (Punica granatumL.) seed oil: A promising approach for antimicrobial and anticancer applications
anticancer cytotoxicity; antimicrobial; cobalt oxide nanoparticles; green synthesis; Punica granatum seed oil
Green synthesis of nanoparticles and their pharmacological implementation have gained importance in the field of nanotechnology. This study primarily aims to explore the use of Punica granatum L. seed oil as a reducing agent for the synthesis of cobalt nanoparticles, making it both economically and pharmacologically valuable. Gas chromatography-mass spectroscopy analysis was carried out to study the active metabolites present in P. granatum seed oil. The green synthesis of cobalt nanoparticles was established based on the color change of the reaction mixture from dark green to light green. These particles showed a ?max at 279.88 nm for UV-visible spectrometry analysis. Furthermore, X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscope (FE SEM) and Dynamic Light Scattering (DLS) were performed to confirm the nature of these nanoparticles. The pharmacological potential of these cobalt oxide nanoparticles was tested against microbial pathogens. The results suggest that these nanoparticles exhibited significant activity against various human bacterial and fungal pathogens. Additionally, in in vitro cytotoxicity analysis, demonstrated that CoONPs selectively targeted MCF-7 cancer cells with a significant IC50 value compared to non-cancerous cells (L929). In conclusion, this study demonstrated that green synthesized CoONPs using P. granatum show significant potential against eukaryotic cancer cells and microbial pathogens. Furthermore, this study has implications for medical research centers and pharmaceutical industries in addressing modern challenges such as increasing antibiotic resistance in communities. 2024 Horizon e-Publishing Group. All rights reserved.
Plant Science Today, Vol-11, No. 2, pp. 221-232.
https://doi.org/10.14719/pst.3014 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85191861268&doi=10.14719%2fpst.3014&partnerID=40&md5=4ed00611d58d4975de3e1b02cb85b857
Chole P.B., Department of Life Sciences, CHRIST (Deemed to be University), Bangalore, 560 029, India; Bt M., Department of Life Sciences, CHRIST (Deemed to be University), Bangalore, 560 029, India
Green synthesis of Fe-doped manganese oxide nanoparticles: enhanced their antibacterial and anticancer properties assessed by biological analysis
Antibacterial; Anticancer activity; Green synthesis; iron doping; Manganese oxide
Eco-friendly synthesis methods are becoming increasingly important as a sustainable way to produce nanoparticles, thereby improving their potential for biomedical applications. The nanoparticles have a small size, a high surface area-to-volume ratio, and the ability to be functionalized with targeting ligands, making them ideal for drug delivery, imaging, and diagnostic purposes. In anticancer therapies, nanoparticles can enhance treatment efficacy by improving drug solubility, enabling controlled release, and selectively targeting cancer cells, thereby minimizing side effects on healthy cells. In the present work, the green engineering of manganese oxide (GEMn2O3) and iron-doped manganese oxide (GEFe@Mn2O3) nanoparticles (NPs) was achieved using a green process with Cynoglossum zeylanicum extract. The synthesized nanoparticles were characterized by XRD, FTIR, DLS, PL, and FESEM analysis. The antibacterial activity of GEMn?O? and GEFe@Mn?O? NPs was tested against S. aureus. GEFe@Mn?O?NPs showed significant antibacterial activity as compared to the GEMn?O?NPs. The antioxidant activity of GEMn?O? and GEFe@Mn?O? NPs was studied again using the DPPH assay. Cytotoxicity assays demonstrated that GEMn?O? and GEFe@Mn?O? NPs exhibit significant anticancer activity against a human blood cancer cell line (MOLT-4). The findings indicate a strong correlation between the increased oxygen vacancies of the GEFe@Mn?O? NPs and their enhanced biocidal properties. This suggests that GEFe@Mn?O? nanoparticles (NPs) are promising candidates for antibacterial and anticancer applications due to their unique physicochemical properties, including enhanced redox activity, reactive oxygen species (ROS) generation, and potential for targeted cellular interaction. The incorporation of iron (Fe) and manganese oxide (Mn?O?) provides synergistic effects that can disrupt microbial cell membranes and induce apoptosis in cancer cells through oxidative stress. Moreover, the engineered nanostructure of GEFe@Mn?O? NPs may offer improved biocompatibility and the ability to penetrate biological barriers, making them suitable for therapeutic delivery and biomedical interventions. 2025 Elsevier B.V.
Dharmaraj, Praveenkumar; Ramesh, Sivalingam; Kakani, Vijay; Kim, Heung Soo; Arulselvan, Palanisamy; Ramalingam, Thenmozhi; Indumathi, T.
Inorganic Chemistry Communications;Volume;183;Issue;;Article No.;115897;
https://doi.org/10.1016/j.inoche.2025.115897 https://www.scopus.com/pages/publications/105023136466?origin=resultslist
Dharmaraj P., KIRND Institute of Research and Development PVT LTD, Tamil Nadu, Tiruchirappalli, India; Ramesh S., Department of Mechanical, Robotics and Energy Engineering, Dongguk University-Seoul, Pil-dong, Jung-gu, Seoul, 04620, South Korea; Kakani V., Department of Integrated System Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, South Korea; Kim H.S., Department of Mechanical, Robotics and Energy Engineering, Dongguk University-Seoul, Pil-dong, Jung-gu, Seoul, 04620, South Korea; Arulselvan P., Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Tamil Nadu, Chennai, 602105, India, Department of Biochemistry, Karpagam Academy of Higher Education (Deemed to be University), Tamil Nadu, Coimbatore, 641 021, India; Ramalingam T., Department of Microbiology, Shrimati Indira Gandhi College, Tamil Nadu, Tiruchirappalli, India; Indumathi T., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, India
Green Synthesis of Hydroxyapatite Nanoparticles Using Semecarpus anacardium Linn leaf Extract: Examination of Anticancer Activity and its Apoptosis Induction
Anticancer activity; Apoptosis; Green fabrication; Hydroxyapatite
Nanotechnology and biomedical sciences enable diverse molecular and cellular applications. Plant-mediated biosynthesis of nanoparticles, a green chemistry approach, offers a cost-effective, eco-friendly alternative to traditional methods. This study focuses on developing hydroxyapatite nanoparticles (HA-NPs) using Semecarpus anacardium Linn (SAL) leaf extract (termed SAL@HA-NPs) as a capping agent and reducing agent. The presence of needle-shaped nanostructures was verified using SEM and TEM investigation. The presence of well-defined rings in the selected area electron diffraction (SAED) patterns provided evidence for the polycrystalline nature of the SAL@HA-NPs). The XRD spectrum exhibited clear peaks that closely corresponded to the hexagonal patterns of HA, indicating a mean crystalline diameter of 54.25nm. The FTIR analysis revealed the presence of biomolecules from Semecarpus anacardium Linn leaves on the surface of the nanoparticles. The suspension of SAL@HA-NPs displayed a polydispersity index of 0.445 and demonstrated excellent stability, as indicated by the zeta potential of -32.2 mV, as observed in the DLS tests. The SAL@HA-NPs exhibited a harmful effect on the HeLa cervical and HepG2 liver cancer cells, with an IC50 value of 52g/mL. Fluorescence microscopy revealed the deformation of the damaged cell membrane, fragmentation, and cell death following treatment with SAL@HA-NPs. The Annexin V-FITC and PI staining confirmed the mode of apoptosis by flow cytometric analysis. Thus, the SAL@HA-NPs acquired in this study could have a crucial impact on the biomedical domain of cancer treatment. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.
Rekha M.M.; Ojha V.; Mewada B.; Gupta S.; Chinnathambi A.; Alahmadi T.A.; Arulselvan P.; Thangavelu I.
Journal of Inorganic and Organometallic Polymers and Materials
Rekha M.M., Department of Chemistry and Biochemistry, JAIN (Deemed-to-be University), Karnataka, Bangalore, 560069, India; Ojha V., Centre for Research and Development, Chitkara University, Himachal Pradesh, 174103, India; Mewada B., Department of Mechanical Engineering, PIT, Parul University, Gujarat, Vadodara, 31760, India; Gupta S., Department of Sciences, Vivekananda Global University, Jaipur, 303012, India; Chinnathambi A., Department of Botany and Microbiology, College of Science, King Saud University, PO Box - 2455, Riyadh, 11451, Saudi Arabia; Alahmadi T.A., Department of Pediatrics, College of Medicine and King Khalid University Hospital, King Saud University, PO Box-2925, Medical City, Riyadh, 11461, Saudi Arabia; Arulselvan P., Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, 602105, India; Thangavelu I., Department of Chemistry, CHRIST (Deemed to be University), Karnataka, Bangalore, 560029, India
Rekha, M.M.; Ojha, Varun; Mewada, Bhavesh; Gupta, Swati; Chinnathambi, Arunachalam; Alahmadi, Tahani Awad; Arulselvan, Palanisamy; Thangavelu, Indumathi
Journal of Inorganic and Organometallic Polymers and Materials;Volume;35;Issue;4;pp.3128-3142
https://doi.org/10.1007/s10904-024-03448-y https://www.scopus.com/pages/publications/85210490251?origin=resultslist
Green synthesis of MgO nanoparticles and its antibacterial properties
anti-bacterial activity; defects; dosimetry; green synthesis; thermoluminescence
Magnesium oxide nanostructured particles (NP) were prepared using a simple solution combustion technique using different leaf extracts such as Mangifera indica (Mango - Ma), Azadirachta indica (NeemNe), and Carica papaya (PapayaPa) as surfactants. The highly crystalline phase of MgO nanostructures was confirmed by PXRD and FTIR studies for 2h 500C calcined samples. To analyze the characteristics of obtained materialMaNP, NeNP, and PaNP for dosimetry applications, thermoluminescence (TL) studies were carried out for Co-60 gamma rays irradiated samples in the dose range 1050KGy; PaNP and NeNP exhibited well-defined glow curve when compared with MaNP samples. In addition, it was observed that the TL intensity decreases, with increase in gamma dose and the glow peak temperature is shifted towards the higher temperature with the increase in heating rate. The glow peak was segregated using glow curve deconvolution and thermal cleaning method. Kinetic parameters estimated using Chens method, trap depth (E), and frequency factor (s) were found to be 0.699, 7.408, 0.4929, and 38.71, 11.008, and 10.71 for PaNP, NeNP, and MaNP respectively. The well-resolved glow curve, good linear behavior in the dose range of 1050, KGy, and less fading were observed in PaNP as compared with MaNP and NeNP. Further, the antibacterial activity was checked against human pathogens such as Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. A visible zone of clearance was observed at 200 and 100?g/mL by the PaNP and NeNP, indicating the death of colonies by the nanoparticles. Therefore, PaNP nanomaterial is a potential phosphor material for dosimetry and antibacterial application compared to NeNP and MaNP. Copyright 2023 Rotti, Sunitha, Manjunath, Roy, Mayegowda, Gnanaprakash, Alghamdi, Almehmadi, Abdulaziz, Allahyani, Aljuaid, Alsaiari, Ashgar, Babalghith, Abd El-Lateef and Khidir.
Rotti R.B.; Sunitha D.V.; Manjunath R.; Roy A.; Mayegowda S.B.; Gnanaprakash A.P.; Alghamdi S.; Almehmadi M.; Abdulaziz O.; Allahyani M.; Aljuaid A.; Alsaiari A.A.; Ashgar S.S.; Babalghith A.O.; Abd El-Lateef A.E.; Khidir E.B.
https://doi.org/10.3389/fchem.2023.1143614 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85151974750&doi=10.3389%2ffchem.2023.1143614&partnerID=40&md5=381262cbc632e158e19bb80e6694c079
Rotti R.B., Department of Physics, School of Applied Sciences, REVA University, Bangalore, India; Sunitha D.V., Department of Physics, School of Applied Sciences, REVA University, Bangalore, India; Manjunath R., Department of Biotechnology, School of Applied Sciences, REVA University, Bangalore, India; Roy A., Department of Biotechnology, Sharda School of Engineering and Technology, Sharda University, Greater Noida, India; Mayegowda S.B., CHRIST-Deemed to be University, Kengeri Campus, Karnataka, Bangalore, India; Gnanaprakash A.P., Department of Studies in Physics, University of Mysore, Mysuru, India; Alghamdi S., Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Makkah, Saudi Arabia; Almehmadi M., Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia; Abdulaziz O., Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia; Allahyani M., Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia; Aljuaid A., Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia; Alsaiari A.A., Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia; Ashgar S.S., Department of Microbiology, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia; Babalghith A.O., Medical Genetics Department, College of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia; Abd El-Lateef A.E., Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Makkah, Saudi Arabia; Khidir E.B., Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
Green synthesis of modified ceria nanoparticles and their catalytic activity studies
Catalysis is a phenomenon where a reaction is taken through an alternative pathway involving lesser energy. Thus, it has an energy saving dimension implicit in its definition. This thesis involves the study of catalysts, synthesized by the solution combustion method. The fuel required for the newlinecombustion is aqueous extract obtained from the leaves of selected plants which gives added credence to the ecofriendly aspirations that dominated our work. A series of ceria based nano sized catalyst materials, pure and modified using rare earth metal oxides, transition metal oxides and a non-metallic substance have been synthesized by the above method. The catalysts have then been newlinecharacterized for their composition, crystallinity, morphology, surface properties, thermal stability etc. The prepared catalysts were subsequently evaluated for their catalytic and photocatalytic efficacy. The photocatalytic potential of the catalysts was evaluated on the degradation studies of two dyes Malachite Green (MG) and Congo Red (CR) under visible light and one antibiotic drug ciprofloxacin (CIP) under UV light. The catalysts were found to show good photocatalytic efficiency newlineon all the three substances mentioned above. The catalytic efficiency was evaluated on two chemical reactions. One, the reduction of 4-nitrophenol to 4-aminophenol and the other, the synthesis of compounds of Biginelli reaction. To achieve maximum reduction the experimental conditions for the catalyst were newlineoptimized. Biginelli reaction involves the condensation of ethyl acetoacetate, newlinebenzaldehyde and urea in presence of modified ceria catalysts to form dihydropyrimidines. The reaction was performed with different catalysts and the one which gave the best yield was selected for further optimization of other reaction conditions. Employing the optimized conditions, a set of different newlinedihydropyrimidinone derivatives were synthesized by varying the precursor newlinealdehydes and ketones. Reusability studies for the catalysts were conducted for all the reactions mentioned above.
Green synthesis of modified ceria nanoparticles and their catalytic activity studies /
Green Synthesis of Nano Carbon-Infused Polymer for The Detection of Toxic Heavy Metals
The global population is marching towards greener ways of life. Green nanotechnology, newlinewhich uses carbon nanomaterials for environmental remediation, is the pioneer among the existing strategies for the production, characterization, and applications of carbon nanomaterials derived from sustainable and renewable energy resources. Additionally, easily available natural ingredients are effective carbon precursors for producing carbon dots with newlineenthralling physical and chemical properties. Compared to other approaches, plant-based newlinesynthesis of nanomaterials is more dependable because it is simple, fast, ecologically newlinefriendly, and does not require particular conditions. We report for the first time, the use of a fluorescent nanocarbon material synthesised from plant, Indigofera Tinctora (L.) (IBLH), for the detection of metal ions. This nanomaterial developed using a green synthesis method that aided hydrothermal processing from the leaf extract of IBLH. The IBLH sensor used to detect hazardous metal ions (Pb2+) was very sensitive and selective. Considering the concentration from 1 nM to 100 mM and 100 mM to 1M, developed sensor displayed broad, dual linearity. The limit of detection (LOD) for the sensor appreciable low with 14.74 nM as the detection limit, with a wide and linear response spanning from 1 nM to 1M Cd2+ concentration range. Utilising Ruta Graveolens as the carbon source, we developed ARH-CDs from agricultural waste using chemical-free, one-step hydrothermal procedures that are safe for the environment. The synthesized ARH-CDs showed nano particle size, outstanding water newlinesolubility, great biocompatibility, and appreciable optical characteristics. The FTIR and XPS findings validated the existence of functional groups. such as C-O, C-C, and O-H with various oxygen functional groups, with predominating hydroxyl group, supporting the newlineexistence of CDs. For the selective detection of Hg2+, the synthesized ARH-CDs are employed as a biocompatible fluorescence sensor.
Green synthesis of nanoparticles from biodegradable waste extracts and their applications: a critical review
Biodegradable wastes; Eco-friendly; Green synthesis; Metal and metal oxide nanoparticles; Sustainable environment
The contemporary world is concerned only with non-biodegradable waste management which needs more sophisticated procedures as compared to biodegradable waste management. Biodegradable waste has the potential to become useful to society through a simple volarization technique. The researchers are behind sustainable nanotechnology pathways which are made possible by using biodegradable waste for the preparation of nanomaterials. This review emphasizes the potentialities of biodegradable waste produced as a viable alternative to create a sustainable economy that benefits all humans. Volarization results in the utilization of biowastes as well as provides safer and hazard-free green methods for the synthesis of nanoparticles. Starting from different sources to the application which includes therapeutics, food industry and water treatment. The review hovers over the pros and cons of biowaste-mediated nanoparticles and concludes with possible advances in the application. In the present scenario, the combination of green synthesis and biowaste can bring about a wide variety of applications in nanotechnology once the hurdles of bulk-scale industrial production are resolved. Given these points, the review is focused on the cost-effective synthesis of metal and metal oxide nanoparticles. 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
Aswathi V.P.; Meera S.; Maria C.G.A.; Nidhin M.
Nanotechnology for Environmental Engineering, Vol-8, No. 2, pp. 377-397.
Springer Science and Business Media Deutschland GmbH
Aswathi V.P., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Meera S., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Maria C.G.A., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Nidhin M., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India
Green synthesis of nanoparticles leading to the biocontrol of aedes aegypit
Green Synthesis of Nanoparticles Leading to the Biocontrol of Aedes Aegypti
Mosquitoes are the potential vectors of many diseases such as malaria, dengue, brain newlinefever, etc. There is a need to check the proliferation of the population of vector newlinemosquitoes to reduce vector-borne diseases by appropriate control methods. Nanotechnology, a promising field of research, opens up in the present decade and is expected to give major impulses to technical innovations. Over the past few decades, nanoparticles of noble metals such as silver exhibited significantly distinct physical, chemical and biological properties. Presently, there is a need for increased efforts to develop newer and more effective methods to control mosquito vectors. Due to different technical and operational reasons, the existing chemical and biological methods are not as effective as in the earlier period. Therefore, this study is designed to extract silver newlinenanoparticles from plant, fungal and bacterial species and assess their impact on the third and fourth-instar mosquito larvae and the adult mosquito (Aedes spp). The study has formulated a gel material that is composed of nanomaterials that exhibited promising properties to develop a nano gel product. The study is designed in a way to have an impact on the control of mosquito larvae using biologically synthesized nanoparticle formulations. Green synthesis is expected to show a higher yield of nano products that can be formulated in various forms to standardize the biocontrol of mosquito species. Bioinformatic studies revealed the good binding potential of the extracted bio compounds against the juvenile hormone binding proteins in A. aegypti. The study deduced meaningful outcomes that can benefit the environment by controlling the mosquito population and thereby reducing disease transmission in many developing countries.
Green synthesis of NiTiO? and tartaric acid-coated NiTiO? nanoparticles using Tagetes erecta: Characterization and biological applications
Antibacterial activity; DPPH; NiTiO3-T NPs; Tagetes erecta
This study investigated the environmentally friendly synthesis, structural characterization, and biomedical potential of nickel titanate (NiTiO?) nanoparticles (NPs) prepared using Tagetes erecta (marigold) flower extract, with particular emphasis on their tartaric acid-coated, functionalized derivative (NiTiO?-T NPs). Structural analyses via FTIR spectroscopy revealed functional groups characteristic of the tartaric acid coating on NiTiO?-T NPs, while XRD confirmed the crystalline hexagonal phase for both NiTiO? and NiTiO?-T NPs. FESEM images demonstrated that both types of NPs exhibited uniform, spherical morphologies. Biomedical evaluations highlighted the enhanced efficacy of NiTiO?-T NPs, which achieved 85.2 % DPPH radical scavenging at 100 ?g/mL, significantly outperforming uncoated NiTiO? NPs (72.4 %). Antimicrobial testing against various pathogens showed that NiTiO?-T NPs generated larger inhibition zones compared to their counterparts, effectively targeting Gram-positive bacteria (S. aureus, B. subtilis), Gram-negative bacteria (E. coli, P. aeruginosa), and fungi (C. albicans). Further analysis revealed notably lower minimum inhibitory concentrations (MICs: 1000 ?g/mL) and minimum bactericidal concentrations (MBCs: 1500 ?g/mL) for NiTiO?-T NPs, confirming their potent bactericidal action. These findings position tartaric acid-functionalized NiTiO?-T NPs as promising candidates for dual-functional therapeutic applications. 2025
Journal of Molecular Structure;Volume;1355;Issue;;Article No.;144941;
https://doi.org/10.1016/j.molstruc.2025.144941 https://www.scopus.com/pages/publications/105023696523?origin=resultslist
Green synthesis of palladium nanoparticles from Polyalthia longifolia leaves and Evaluation of its catalytic and antibacterial Activities
Antimicrobial activity; Green synthesis; Nitroarene reductions; Palladium nanoparticles; Suzuki-Miyaura
This study focuses on the green production of palladium nanoparticles utilizing a sustainable and non-hazardous extract derived from the leaves of Polyalthia longifolia (Pl). The synthesized nanoparticles was named as Pl/Pd (0) and were characterized using TGA, ICP-AES, TEM, FESEM, and XRD analysis. The average size of Pl/Pd (0) nanoparticles was found to be 12 nm and showed excellent activity towards the Suzuki coupling and nitroarene reduction reactions. The catalyst also gave good results for the reusability test for both the reactions. It is noted that the same can be reused in the reaction upto to 5 consecutive cycles. In addition to its catalytic activity, the antibacterial activity of the Pl/Pd(0) was also evaluated against Bacillus subtilis and Pseudomonas aeruginosa bacteria. The nanoparticles had an inhibitory effect on both the test pathogens. 2025 Elsevier B.V.
Hegde, Sumanth; Nizam, Aatika; Lakshmaiah, Vasantha Veerappa; Naga Sahithi, Baru Venkata; Nagella, Praveen; Krishna, Suresh Babu Naidu
Inorganic Chemistry Communications;Volume;178;Issue;;Article No.;114585;
https://doi.org/10.1016/j.inoche.2025.114585 https://www.scopus.com/pages/publications/105003953611?origin=resultslist
Hegde S., Department of Chemistry, Christ University, Hosur road, Bangalore, 560029, India; Nizam A., Department of Chemistry, Christ University, Hosur road, Bangalore, 560029, India; Lakshmaiah V.V., Department of Life Sciences, Christ University, Hosur road, Bangalore, 560029, India; Naga Sahithi B.V., Department of Life Sciences, Christ University, Hosur road, Bangalore, 560029, India; Nagella P., Department of Life Sciences, Christ University, Hosur road, Bangalore, 560029, India; Krishna S.B.N., Department of Nursing, Faculty of Health Sciences, Durban University of Technology, PO Box 1334, Durban, 4000, South Africa
Green Synthesis of Reduced Graphene Nanostructure from Cinnamomum Camphora
carbon nanoparticle; chemical oxidation; Cinnamomum camphora; green synthesis
A facile green synthesis for carbon nanoparticle production using Cinnamomum camphora (Camphor) is presented. Camphor upon carbonization and chemical oxidation leads to the formation of nano-carbon structures with lateral size 7.33nm to 4.14nm, respectively. The nanomaterial's stacking height is about 2.76nm and 3.10nm, leading to the formation of about 10 layers of carbon. The AFM analysis confirms that the graphene layer formed is wrinkled or folded. Developments of a layered structure with spheroids are observed on the sample's surface, confirming the graphitization of the amorphous carbon. The relative intensity of the defect to the graphite band is found to be 0.98 for the nanostructure indicating a lesser degree of defects. The C1s band of the nanostructure is deconvoluted to components at 284.7, 286.5, 287.3, and 289 eV, which are assigned to non-oxygenated ring carbon (sp2 carbon), C in C-O (bound to O either as epoxy or hydroxyl), C in C=O (of alcohols, phenols or ether), and C in C(O)O (carboxylic acid) respectively. The study reveals the formation of few-layer oxygenated carbon layers from the botanical hydrocarbon. 2020 by the authors.
Venkatesan R.A.; Joseph N.; Balachandran M.
Letters in Applied NanoBioScience, Vol-10, No. 1, pp. 2003-2011.
https://doi.org/10.33263/LIANBS101.20032011 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117728695&doi=10.33263%2fLIANBS101.20032011&partnerID=40&md5=9d1c6cfd96bdd5d028cd7cb1e583eea6
Venkatesan R.A., Department of Physics & Electronics, CHRIST (Deemed to be University), Bangalore, India; Joseph N., Department of Physics & Electronics, CHRIST (Deemed to be University), Bangalore, India; Balachandran M., Department of Physics & Electronics, CHRIST (Deemed to be University), Bangalore, India
Green synthesis of reduced graphene oxide using Plectranthus amboinicus leaf extract and its supercapacitive performance
graphene oxide; Green synthesis; Plectranthus amboinicus; reduced graphene oxide; supercapacitive performance
A rapid, efficient, green and eco-friendly approach for the preparation of reduced graphene oxide (rGO) using Plectranthus amboinicus (Indian borage) leaves extract (PAE) is explored in this study. The improvement in the reduction process was studied by varying the concentration of graphene oxide (GO), temperature and time duration. The physical and chemical properties of rGO are studied using Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction (XRD) and field emission scanning electron microscope. The result obtained from XRD analysis confirms the removal of an oxygen-containing functional group of GO significantly by PAE. Raman analysis showed a higher ID/IG ratio for rGO (1.297) than GO (1.07), which indicates a higher level of disorder in the rGO with a decrease in the average size of the sp2 domain. From the electrochemical studies, a significant specific capacitance of 92.05Fg1 (5mVs1) is obtained from the cyclic voltammetry (CV) curves and 73.20Fg1 (0.1Ag1) from the galvanostatic chargedischarge (GCD) curve. 2021, Indian Academy of Sciences.
Dominic R.M.; Punniyakotti P.; Balan B.; Angaiah S.
Bulletin of Materials Science, Vol-45, No. 1
Dominic R.M., Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India, Department of Chemistry, Christ (Deemed to be University), Bengaluru, 560029, India; Punniyakotti P., Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India; Balan B., Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India; Angaiah S., Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India