Photocatalytic degradation of nitrobenzene wastewater with H3PW12O40/TiO2

摘要

In order to treat a mass of industrial wastewater nitrobenzene, a photocatalytic degradation method was studied in this paper. Phosphotungstic acid(H3PW12O40) and titanium dioxide(TiO2) were prepared, and a new-style catalyst H3PW12O40 supported on TiO2(H3PW12O40/TiO2) was prepared by the method of impregnation. We characterized them using X-Ray and FT-IR. The results proved that H3PW12O40 possessed classical Keggin structure, TiO2 was anatase and H3PW12O40 can keep the Keggin structure on the TiO2. The effects of photocatalytic degradation of nitrobenzene wastewater under visible light in the presence of H3PW12O40/TiO2 were investigated in detail. The research results revealed that reaction time, catalyst dosage, nitrobenzene original concentration were the main effects, and the biggest degradation of nitrobenzene wastewater was 94.1% at the optimum condition. The exhibited photocatalytic activity of the novel photocatalyst provided a promising solution for the degradation of nitrobenzene water contaminants.