WO_3/BiOBr光催化剂催化降解甲基橙溶液

采用水热法制备WO_3/BiOBr复合光催化剂,以甲基橙为目标污染物,分别考察了催化剂用量、甲基橙溶液初始浓度、pH值及盐效应等对复合光催化剂光催化降解甲基橙性能的影响,并通过循环使用实验,考察复合光催化剂的稳定性。结果表明,在催化剂用量为2.0 g·L~(-1)、甲基橙初始浓度为20 mg·L~(-1)和溶液pH=6.2的条件下光照反应2 h,甲基橙脱色率可达99.39%;溶液中的Na Cl对降解有抑制作用;催化剂重复使用4次后,对甲基橙的脱色率仍可达74.77%,表明复合光催化剂有良好的光催化活性和稳定性。

Degradation of methyl orange by WO3/BiOBr photocatalyst

WO₃/BiOBr photocatalyst was prepared by hydrothermal method.Methyl orange was used as the target pollutant.Effects of catalyst dosage,initial concentration of methyl orange solution,pH value and salt effect on photocatalytic activity were investigated.Stability of photocatalyst was also investigated through recycling experiment.The results showed that decolorization efficiency of methyl orange could reach 99.39% when dosage of catalyst was 2.0 g·L^-1,initial concentration of methyl orange was 2.0 g·L^-1,pH of solution was 6.2 and treatment time was 2 h.NaCl in solution could inhibit the degradation of methyl orange.After being repeated use 4 times,the degradation rate of methyl orange could still reach 74.77%,indicating that the photocatalyst had good photocatalytic activity and stability.