Photocatalytic Degradation of Methyl Violet with H_3PW_6Mo_6O_(40)/SiO_2 Sensitized by H_2O_2

摘要

H_3PW_6Mo_6O_(40)/SiO_2 was prepared by sol-gel method, and sensitized by H_2O_2 solution. The photocatalytic degradation of methyl violet by H_3PW_6Mo_6O_(40)/SiO_2 under simulated natural light irradiation was investigated. The results demonstrated that at optimal condition (initial concentration of methyl violet is 10 mg/L, and the pH is 2.5, the dosage of catalyst is 0.5% based on feed stocks), the degradation rate of methyl violet is as high as 88.7% after 2.5h simulated natural light irradiation. The reaction of photocatalysis for methyl violet can be expressed as first-order kinetic model.