PMoV／TiO2光催化降解甲基橙反应条件优化及动力学研究

溶胶-凝胶法制备光催化剂PMoV／TiO2光催化降解甲基橙溶液，考察了催化剂用量、氧化剂用量、光强度和甲基橙染料溶液浓度对降解反应的影响。结果表明，在甲基橙染料溶液初始浓度为6mg／L，催化剂PMoV／TiO2用量0．12g，氧化剂双氧水用量8mL，晴天光照条件下，甲基橙染料溶液脱色率达90．79％。最后，研究了该光催化反应的动力学过程。

Optimization of Reaction Conditions for Photocatalytic Degradation of Methyl Orange by PMoV/TiO2 and Study of Its Kinetics

Degradation of methyl orange solution was photocatalyzed by PMoV/TiO2 as photocatalyst prepared by sol - gel method. The effects of dosage of catalyst and oxidant,light intensity , and concentration of methyl orange dye solution on the degradation were examined. The result showed that the decolorizing efficiency of methyl orange dye solution was up to 90.79% under the conditions as follows： initial concentration of methyl orange dye solution 6 mg/L,dosage of catalyst PMoV/TiO20.12 g, volume of hydroperoxide as oxidant 8 mL at sunlight. The kinetics of the photocatalytic degradation was finally studied.