薄膜化固体超强酸SO_4^(2-)/TiO_2-WO_3光催化降解甲基橙

Photocatalytic Degradation of Methyl Orange by SO_4^(2-)/TiO_2-WO_3 Solid Superacid Membrane

采用硫酸溶液浸渍处理TiO2-WO3制得SO24-/TiO2-WO3薄膜光催化剂,考察了光催化剂对甲基橙溶液的光催化降解行为。结果表明,在硫酸浓度为0.2mol·L-1、焙烧温度为550℃、WO3掺杂量为2%的最佳条件下制备的光催化剂活性最高,甲基橙降解90min的降解率达到72%。

The photocatalyst SO4^2/TiO2-WO3 solid superaeid membrane with different loading of SO4^2- anion from H2SO4 was prepared. Its photocatalytic activity for the degradation of methyl orange was investigated. The results showed that the catalytic activity of SO4^2-/TiO2-WO3 solid superacid membrane was the highest prepared under the optimum conditions as follows： sulfuric acid concentration was 0. 2 mol · L-1, calcination temperature was 550 ℃ ,and doping amount of WOa was 2%. The degradation rate of methyl orange reached 72% when degraded for 90 min.