Tin Oxide

A green, phytogenic and cost effective synthesis of tin oxide nanoparticles (SnO 2 NPs) using aqueous leaf extract of Tradescantia spathacea is reported. The structural, surface morphological and optical studies have been performed using X-ray diffraction (XRD), Fourier-Transform Infrared spectroscopy (FT-IR), Scanning Electron mi-croscopy (SEM), UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), photoluminescence (PL), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET). XRD pattern shows SnO 2 with tetragonal structure of crystallite size ranging 9-22 nm. The FTIR spectra exhibits the presence of hydroxyl groups, amines, alkenes and phenols from the aqueous leaf extract which are responsible for the synthesis of narrow band gap SnO 2 NPs. The SEM analysis suggests slight agglomeration morphology with particle size in the range of 46-89 nm. The band gap energy obtained was in range of 2.51-3.3 eV. Photoantioxidant activities of SnO 2 NPs in the dark and under visible light illumination were carried out. The SnO 2 NPs showed enhanced photoantioxidant activities under visible light irradiation.