PHOTOCATALYTIC OXIDATION OF INDANTHRENE BLUE RS -AN ANTHRAQUINONE VAT DYE USING TiO_2 PHOTOCATALYST

摘要

Nanometer sized powder form of TiO_2 is prepared by wet chemical method of gel to crystalline conversion.The crystallite size is 177.528 A as estimated by X-ray diffraction studies.The photocatalytic activity of this semiconducting powder at different experimental conditions is presented.The effect of inorganic oxidising agent (NH_4)_2S_2O_8 producing hydroxyl radicals to increase the rate of photocatalytic degradation of the dye is studied.The degradation path was followed by UV-vis.and IR spectroscopic techniques.The intermediates formed during the degradation process was made evident from the above techniques.Based on the results, a kinetic model for the degradation is proposed.