ItemArticle

Emerging applications of sustainable modified CdO/Ag-CdO NPs for electrochemical sensitive and selective detection of mercury (Hg+) heavy metal

Title
Emerging applications of sustainable modified CdO/Ag-CdO NPs for electrochemical sensitive and selective detection of mercury (Hg+) heavy metal
Creator
Surendra, B.S.; Sowmya, H.N.; Kiran, T.; Bhaskar, M.; Rajappa, Shwetha; Uma, B.; Khasim, Syed; Murthy, H. C. Ananda; Chan, K.Y.
Description
The sensitivity of developed electrode has gained significant attention for potential energy storage and electrochemical sensor activities. The modified nano-CdO/Ag-CdO-carbon paste electrodes were developed for electrochemical detection of mercury (Hg+) heavy metal. The synthesized samples were well characterized through PXRD (Powder X-ray diffraction), SEM-EDAX (Scanning Electron Microscopy-Energy Dispersive X-ray Analysis), XPS (X-ray photo-electron spectroscopy), FT-IR (Fourier transform Infra-Red), and UV-Visible spectroscopy. The Ag-CdO modified electrode endowed with higher sensing current and Csp (188F/g) than pure CdO NPs (94.6F/g) measured by Linear Sweep (LS), Cyclic Voltammetric (CV) and Electrochemical Impedance Spectral (EIS) techniques. The excellent electrochemical sensing action of developed Ag-CdO electrode was examined on heavy metal Hg+ ions at 15 mM scan rate in 0.1M KCl. The linear relationship of sensing measurements with smaller concentration (15 mM) was observed with its increased current (+ 1.64 104 A/cm2 at 1 mM) at 30 mV/s. LOD of CdO and Ag-CdO electrodes (Hg+Oxid) were found at 1.91 mM & 2.41 mM (Hg+Red) respectively with maximum sensitivity at -0.006V. LOQ of CdO and Ag-CdO electrodes (Hg+Oxid) were 5.78 mM & 6.98 mM respectively with maximum sensitivity at -0.006V. The antibacterial measurements of prepared samples were examined for their susceptibility to inhibit the growth of gram-negative (Escherichia coli) and gram-positive (Staphylococcus aureus) bacteria. Thus, the synthesized Ag-CdO electrode provides a new insight for determining the concentrations of critical pollutants and processing the various nanoparticles for sensing of cyanogenic heavy metals. The Author(s) 2025.
Source
Scientific Reports;Volume;15;Issue;1;Article No.;28200;
Date
01-01-2025
Publisher
Nature Research
Subject
Ag-CdO NPs; Bio-fuel; Electrochemical sensor; Heavy metal detection; Photocatalytic studies
Coverage
Surendra B.S., Department of Chemistry, Dayananda Sagar College of Engineering, Bengaluru, 560078, India; Sowmya H.N., Department of Civil Engineering, Dayananda Sagar College of Engineering, Bangalore, 560078, India; Kiran T., Department of Chemistry, SJB Institute of Technology, Uttarali Road Kengeri, Bangalore, 560060, India; Bhaskar M., Department of Chemistry, Centre for Nanoscience & Nanotechnology, Global Academy of Technology, Ideal Homes Township, R R Nagar, Bangalore, 560098, India; Rajappa S., Department of Sciences and Humanities, School of Engineering and Technology, Christ University, Kumbalagodu, Mysore Road, Bengaluru, 560074, India; Uma B., Department of Chemistry, Dayananda Sagar College of Engineering, Bengaluru, 560078, India; Khasim S., Advanced Materials Research Laboratory, Department of Physics, Faculty of Science, University of Tabuk, Tabuk, 71491, Saudi Arabia; Murthy H.C.A., Department of Chemistry, School of Applied Sciences, Papua New Guinea University of Technology, Morobe Province, Lae, 411, Papua New Guinea, Department of Prosthodontics, Saveetha Dental College & Hospital, Saveetha Institute of Medical and Technical Science (SIMATS), Saveetha University, Tamil Nadu, Chennai, 600077, India; Chan K.Y., Faculty of Artificial Intelligence and Engineering, Multimedia University, Persiaran Multimedia, Selangor, Cyberjaya, 63100, Malaysia, Centre for Advanced Devices and Systems, Centre of Excellence for Robotics and Sensing Technologies, Multimedia University, Persiaran Multimedia, Selangor, Cyberjaya, 63100, Malaysia
Rights
All Open Access; Gold Open Access; Green Open Access
Relation
ISSN: 20452322;
Format
online
Language
English
Type
Article

Citation

Surendra, B.S.; Sowmya, H.N.; Kiran, T.; Bhaskar, M.; Rajappa, Shwetha; Uma, B.; Khasim, Syed; Murthy, H. C. Ananda; Chan, K.Y., “Emerging applications of sustainable modified CdO/Ag-CdO NPs for electrochemical sensitive and selective detection of mercury (Hg+) heavy metal,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/22525.

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