Sulphur-doped titanium dioxide nanoparticles for visible-light induced photo-mineralization of Reactive Red 141

摘要

Non-metal doped photocatalysts (Sulphur or fluorine-doped TiO2) prepared through sol-gel technique are characterized using powder X-ray diffraction (XRD) and UV-vis diffuse reflectance spectroscopic techniques. The prepared photocatalysts consist of purely anatase phase TiO2 and showed an enhanced photocatalytic activity for the degradation of organic pollutant, Reactive Red 141 (RR141), as compared to undoped TiO2 under visible light irradiation. Photocatalytic mineralization is evaluated by total organic carbon (TOC) analysis. Effect of the concentration of oxidants, namely, potassium peroxomonosulphate (oxone or PMS), potassium peroxodisulphate and hydrogen peroxide, and the amount of catalyst to the dye ratio on the rate of degradation are worked out.