Method for degrading methyl orange through photocatalysis of H3PW6Mo6O40/ZrO2-SiO2 treated by H2O2

Abstract

The invention discloses an H3PW6Mo6O40/ZrO2-SiO2 catalyst prepared with an impregnation method, wherein the catalyst is subjected to sensitization treatment by H2O2 and subjected to characterization through FT-IR (Fourier transform infrared spectroscopy) and XRD (X-ray diffraction). The catalytic degradation activity of the catalyst to a methyl orange solution is discussed, and influence of initial concentration and pH of a solution and catalyst dosage on photocatalytic degradation of methyl orange is researched systematically. The research shows that H3PW6Mo6O40/ZrO2-SiO2 has a good degradation effect on methyl orange; methyl orange is illuminated for 2.5 h under the conditions that the initial concentration of the methyl orange solution is 10 mg/L, the pH of the solution is 2.5 and the catalyst dosage is 0.5% of the total solution mass, and the degradation rate of methyl orange is up to 91.1%; and the reaction of photocatalytic degradation of the methyl orange solution by the H3PW6Mo6O40/ZrO2-SiO2 catalyst is the first-grade kinetic reaction.

Description

technical field [0001] The invention relates to the field of photocatalytic oxidation, in particular to H 2 o 2 Handle H 3 PW 6 Mo 6 o 40 / ZrO 2 -SiO 2 A method for the photocatalytic degradation of methyl orange. Background technique [0002] In recent years, the discharge of organic dye wastewater has caused serious environmental pollution. Commonly used wastewater treatment methods include coagulation, membrane separation, adsorption, electrolysis and other biological and physical methods. However, these methods only transfer the organic dye pollutants to other phases, and do not degrade the organic dye pollutants into non-toxic substances. Therefore, effective treatment of organic dye pollutants has become a difficult problem in the field of environment and chemistry. [0003] As a kind of advanced oxidation technology, photocatalytic oxidation has shown outstanding advantages in the degradation of organic matter, which can deeply oxidize organic matter into H ...

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