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用共沉淀法制备了新型La-TiO2/Hβ复合光催化剂,并以亚甲基蓝溶液为模拟废水,探讨了其对亚甲基蓝溶液的光催化降解效果,优化了降解条件。结果表明,La-TiO2/Hβ复合光催化剂降解25mL亚甲基蓝溶液的适宜条件是:亚甲基蓝溶液初始浓度为20mg/L,光照时间为30min,氧化剂H2O2用量为2.0mL,催化剂用量为2.4g/L。在此反应条件下,亚甲基蓝降解率达到98.2%,且催化剂重复使用3次后催化活性基本不变。
A novel La-TiO2 / Hβ composite photocatalyst was prepared by coprecipitation. The photocatalytic degradation of methylene blue solution by methylene blue solution was studied. The degradation conditions were optimized. The results showed that the optimal conditions for the degradation of 25mL methylene blue solution by La-TiO2 / Hβ photocatalyst were as follows: the initial concentration of methylene blue solution was 20mg / L, the irradiation time was 30min, the amount of oxidant H2O2 was 2.0mL and the amount of catalyst was 2.4g / L. Under this reaction condition, the degradation rate of methylene blue reached 98.2%, and the catalytic activity remained unchanged after the catalyst was reused for three times.