Synthesis, analysis and characterization of structural, optical, photoluminescence, chromaticity, antimicrobial, antioxidant, and hemolysis properties of SnO2-NiO nanocomposites J. Gajendiran, Idamakanti Siva Kalyani, Vellaturi Ramya, Ch.Siva Chakravarthi, S. Gnanam, J.Ramana Ramya, P. Balraju, G. Thennarasu, R. Suresh, Lalitha Gnanasekaran Materials Science and Engineering B, 2026 SnO 2 -NiO nanocomposites were synthesized through co-precipitation utilizing two distinct tin oxide precursors (Sn powder and tin dichloride dihydrate) along with a nickel precursor (nickel nitrate). XRD analysis validated the presence of tetragonal rutile SnO 2 and face-centered cubic NiO phases, with increasing temperatures (450–650 °C) leading to improved crystallinity and increased crystallite size. FE-SEM analysis displayed average particle sizes ranging from 10-37 nm, depending on precursor and calcination temperature. EDX confirmed variations in elemental composition of Sn, O, and Ni with increasing calcination temperature. Optical studies of SnO 2 -NiO revealed a reduction in the band gap and photoluminescence (PL) emission intensity with increasing calcination temperature, accompanied by strong PL peaks at 393, 436, and 465 nm, corresponding to UV and blue emissions. The chromaticity diagrams of all calcined SnO 2 -NiO nanocomposites showed blue colour emissions. The antibacterial efficacy of SnO 2 -NiO nanocomposites was evaluated against E. coli and S. aureus . The nanocomposites demonstrated comparatively larger zones of inhibition against E. coli than against S. aureus , suggesting superior antibacterial effectiveness. Additionally, antioxidant and hemolysis tests were performed to evaluate the free radical scavenging capacity and hemocompatibility of the nanocomposites, respectively. The findings revealed a notable variation with respect to calcination temperature. In particular, as the calcination temperature increased, there was a decrease in the zone of inhibition, free radical scavenging activity, and hemolytic percentage. This reduction is likely attributed to the enhanced crystallinity of the nanocomposites at elevated temperatures.
Anionic, cationic and nonionic surfactants-assisted hydrothermal synthesis Of tin oxide nanoparticles and their photoluminescence property Digest Journal of Nanomaterials and Biostructures, 2010
Influence of ethylene glycol on the nanostructured pure and V-doped SnO2 nanoparticles via sol-gel process and application in photocatalysts Journal of Optoelectronics and Advanced Materials, 2010
Luminescence properties of eg-assisted SnO2 nanoparticles by sol-gel process Digest Journal of Nanomaterials and Biostructures, 2010
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MOST CITED SCHOLAR PUBLICATIONS
Synthesis of CeO 2 or α–Mn 2 O 3 nanoparticles via sol–gel process and their optical properties S Gnanam, V Rajendran Journal of sol-gel science and technology 58 (1), 62-69 , 2011 2011 Citations: 200
Facile sol-gel preparation of Cd-doped cerium oxide (CeO2) nanoparticles and their photocatalytic activities S Gnanam, V Rajendran Journal of Alloys and Compounds 735, 1854-1862 , 2018 2018 Citations: 123
Luminescence properties of EG-assisted SnO2 nanoparticles by sol-gel process S Gnanam, V Rajendran Digest Journal of Nanomaterials and Biostructures 5 (3), 699-704 , 2010 2010 Citations: 87
Synthesis of tin oxide nanoparticles by sol–gel process: effect of solvents on the optical properties S Gnanam, V Rajendran Journal of sol-gel science and technology 53 (3), 555-559 , 2010 2010 Citations: 86
Facile hydrothermal synthesis of alpha manganese sesquioxide (α-Mn2O3) nanodumb-bells: structural, magnetic, optical and photocatalytic properties S Gnanam, V Rajendran Journal of alloys and compounds 550, 463-470 , 2013 2013 Citations: 83
Preparation of Cd-doped SnO 2 nanoparticles by sol–gel route and their optical properties S Gnanam, V Rajendran Journal of sol-gel science and technology 56 (2), 128-133 , 2010 2010 Citations: 64
Influence of Various Surfactants on Size, Morphology, and Optical Properties of CeO2 Nanostructures via Facile Hydrothermal Route SGV Rajendran Journal of Nanoparticles 1 (1), 1-6 , 2013 2013 Citations: 61
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Anionic, cationic and nonionic surfactants-assisted hydrothermal synthesis of tin oxide nanoparticles and their photoluminescence property S Gnanam, V Rajendran Digest Journal of Nanomaterials and Biostructures 5 (2), 623 , 2010 2010 Citations: 44
Optical Properties of Capping Agents Mediatited Lead Oxide Nano Particales via facile hydrothermal Process S Gnanam, V Rajendran J. of Nanomterial and Biostractures 1 (12), 6 , 2004 2004 Citations: 29
Structural, optical and photocatalytic properties of ZnS spherical/flake nanostructures by sugar-assisted hydrothermal process J Gajendiran, S Gnanam, VV Kumar, K Ramachandran, JR Ramya, ... Chemical Physics Letters 754, 137639 , 2020 2020 Citations: 24
Synthesis of undoped and mixed binary transition metals (Ni-Co)-doped cupric oxide nanostructures: structural characteristics, optical behavior, and biological activity M Karthikeyan, J Gajendiran, S Gnanam, JR Ramya, KT Arul, ... Journal of Molecular Structure 1321, 139895 , 2025 2025 Citations: 20
Antimicrobial activity of the novel metal oxide nanoparticles against selected human pathogenic bacteria S Gnanam, R Ashokkumar, K SenthilKannan IOP Conference Series: Materials Science and Engineering 561 (1), 012086 , 2019 2019 Citations: 15
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Antimicrobial efficiency against fish pathogens on the green synthesized silver nanoparticles JR Ramya, S Ali, R Vijayalakshmi, J Gajendiran, S Gnanam, ... Microbial Pathogenesis 193, 106725 , 2024 2024 Citations: 14
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Various concentrations of yttrium oxide (Y2O3) doping induce changes in structural, magnetic, optical, and photoluminescence properties of solid-state synthesized strontium … D Anand, K Ramachandran, M Silambarasan, J Gajendiran, S Gnanam Optical Materials 147, 114706 , 2024 2024 Citations: 11
Growth and XRD, CHNSO, Pl, Beam Displacement, Influx, Mass Spectral Characterization and Effect of LDT - Laser Fluence on L-Arginine Phosphate Monohydrate (LAPM) Crystals KS K. Kumar, K.Senthilkannan, M. Vimalan, S. Gnanam, S. Jeyakumar, P. Baskaran American International Journal of Research in Science, Technology … , 2019 2019 Citations: 10