Green and Phytogenic Fabrication of Co-Doped SnO2 Using Aqueous Leaf Extract of Tradescantia spathacea for Photoantioxidant and Photocatalytic Studies

The influence of cobalt doping in SnO2 crystal lattice tailored the optical, structural, and surface properties SnO2. Co2+ was successfully doped (Co-SnO2) via green synthesis using Tradescantia spathacea aqueous leaf extract. Powder X-ray diffraction patterns synthesized nanoparticles showed a rutile structure with no impurities. As Co-doping increased, average crystallite size increased from 13.25 nm to 32.32 BET results reduced area. presence organic compounds extract confirmed by Fourier-transform infrared spectroscopy. UV-visible diffuse reflectance spectroscopy red shift suggesting band gap reduction Co-doping. photoluminescence study peak quenching increase Spherical smaller particles were observed scanning electron microscopy. density states proposed photoelectron data. A novel antioxidant Co-SnO2 done under visible light irradiation 2,2-diphenyl-1-picrylhydrazyl free radicals compared conventional method dark. Photocatalytic 4-nitrophenol conversion also conducted dark irradiation. enhancement photoantioxidant activities photocatalytic 4-nitrophenolate