分光光度法研究插层膨润土负载掺氮TiO_2光催化剂对亚甲基蓝的光降解

Photodegradation of Intercalated Bentonite Loaded Nitrogen-Doped TiO_2 Photocatalysts on Methylene Blue by Spectrophotometry

采用溶胶-凝胶法制备了具有高活性的可见光响应插层膨润土负载掺氮TiO_2光催化剂(以下简称光催化剂)。利用IR对光催化剂的微观结构进行表征,并以亚甲基蓝为目标降解物,讨论了光催化剂在可见光下的催化活性。结果表明:氮掺杂TiO_2成功负载于插层膨润土片层表面。在尿素掺杂量为0.35g和催化剂用量为40mg条件下,光催化剂对25mL初始浓度为5mg/L的亚甲基蓝溶液的降解率可达99%。

Highly efficient visible-light-induced intercalated bentonite loaded nitrogen-doped TiO2 photocatalystsCphotocatalysts for short）were produced by sol-gel method.The micro-structure of the photocatalysts was characterized by IR,and photocatalytic activity of photocatalysts under visible-light irradiation was discussed with the methylene blue as target degradation products.The results demonstrated that the nitrogen-doped TiO2 was successfully loaded on the surface of the intercalated bentonite.In conditions of the CO（NH2）2 mass of 0.35g and the photocatalysts mass of 40mg,the degradation rate reached 99%for photocatalysts on the methylene blue initial concentration of 5mL/L for 25mL.