Effect of samarium doping on structural properties and electronic structure of Bi0.5Na0.5TiO3ceramic with antimicrobial applications
Antimicrobial properties; Electronic and local structure; Microstructure; Structure
The research work reports a systematic examination of structure, microstructure, electronic and local structure, optical and antimicrobial properties of Bi0.5Na0.5TiO3 (BNT) and Bi0.45Sm0.05Na0.5TiO3 (BSNT) ceramics manufactured by the solid-state route. The influence of a small amount of samarium (Sm) doping at the A-site of BNT matrix is examined using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, field emission-scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge spectroscopy (XANES) and extended X-ray absorption fine structure spectroscopy (EXAFS), UVvis diffused reflectance spectroscopy (DRS), and antimicrobial analyses. XRD reveals single-phase rhombohedral structures with R3c space group. FTIR provides evidence for perovskite structures. Raman spectra illustrate three prominent vibrations, like Bi - O/Na - O, Ti - O vibrations of TiO6, and oxygen ion vibrations of the TiO6 octahedron of both samples. FESEM reveals better grain developments, and elemental confirmations are evident from EDS. The topographical and morphological studies, such as RMS and average roughness, skewness, and kurtosis, are conducted by AFM. XPS reveals dual oxidation states of Ti and Sm, and oxygen vacancies (OVs). A detailed analysis of the electronic structure is performed by examining the Bi L3-edge and Ti K-edge XANES spectra of BNT and BSNT, along with those of the model compounds. The Fourier transform of EXAFS analysis is conducted to probe the local structure, and extracted parameters, like coordination number (N), bond distance (R(), and Debye-Waller factor (?2), are analyzed. UVvis studies reveal a minute reduction in the band gap in BSNT. Impedance study shows the negative temperature coefficient of resistance (NTCR) responses. The antibacterial activities are examined by determining the minimum inhibitory concentration (MIC) and zone of inhibition (ZOI) caused by the materials, along with a control antibiotic, against a variety of bacterial strains. 2025 Elsevier Ltd and Techna Group S.r.l. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Pati, Dinesh Kumar; Mahapatra, Shreyash; Mahapatra, Mitrabinda; Chakroborty, Subhendu; Malviya, Jitendra; Das, Piyush R.; Dwivedi, Rajeev; Parida, B.N.; Urkude, Rajashri R.; Padhee, R.
Ceramics International;Volume;51;Issue;30;pp.62395-62414
Restricted Access; Hardcopy may be available in the library
https://doi.org/10.1016/j.ceramint.2025.10.369 https://www.scopus.com/pages/publications/105024759177?origin=resultslist
Pati D.K., School of Physics, Sambalpur University, Jyoti Vihar, Odisha, Burla, 768019, India, Newton Higher Secondary School of Science, Debaipali, Odisha, Sambalpur, 768200, India; Mahapatra S., Newton Higher Secondary School of Science, Debaipali, Odisha, Sambalpur, 768200, India; Mahapatra M., School of Physics, Sambalpur University, Jyoti Vihar, Odisha, Burla, 768019, India; Chakroborty S., Department of Chemistry, School of Basic Sciences, Chandigarh University Uttar Pradesh, Uttar Pradesh, Unnao, 209859, India; Malviya J., Department of Microbiology, Barkatullah University, MP, Bhopal, 462026, India; Das P.R., Department of Physics, CUPGS, BPUT, Chhend, Odisha, Rourkela, 769015, India; Dwivedi R., Department of Physics, Bennett University, U.P., Greater Noida, 201310, India; Parida B.N., Department of Physics, Central Institute of Technology Kokrajhar, Deemed to be University, BTC, Assam, 783370, India; Urkude R.R., Beamline Development and Application Section, BARC, Trombay, Mumbai, 400085, India; Padhee R., School of Physics, Sambalpur University, Jyoti Vihar, Odisha, Burla, 768019, India