Visible light assisted photocatalytic degradation of Indigo Carmine dye and NO2 removal by Fe doped TiO2 nanoparticles

A simple sol-gel method was employed to synthesize Fe doped TiO2 nanoparticles with a controlled mole percentage of Fe. Synthesized nanoparticles were characterized by several standard analytical techniques. X-ray diffraction patterns (XRD) of pure and Fe doped TiO2 nanoparticles confirm the anatase phase, which is further confirmed by Raman analysis. The change in the morphology and structural modification of the material by doping concentration of Fe in TiO2 is confirmed by Scanning Electron Microscopic (SEM) images and FTIR study respectively. The size and shape of nanoparticles were determined by High-Resolution Transmission Electron Microscopy (HRTEM). The energy bandgap and recombination rate of charge carriers were studied by Optical absorption and Photoluminescence (PL) measurements respectively. Photocatalytic activity of the prepared nanoparticles was investigated through degradation of Indigo Carmine (IC) dye under visible light illumination. Total Organic Carbon (TOC) measurement was done to determine the degree of mineralization of IC-dye on photodegradation. In addition, the Photocatalytic performance of FeT_2 photocatalyst for nitrogen dioxide gas (NO2) removal was evaluated under visible light irradiation and found to be very effective for NO2 removal.