分子筛负载钛酸铋光催化剂的制备及性能研究

Synthesis and Photocatalytic Properties of Zeolite Supported Bismuth Titanate

采用溶胶-凝胶法制备粉末Bi4Ti3O12光催化剂,研究煅烧温度、煅烧时间对其活性的影响,确定了Bi4Ti3O12的制备条件。将HZSM-5作为载体,采用机械混合和溶胶-凝胶法制备负载型χBi4Ti3O12/HZSM-5催化剂。结果表明,700℃下煅烧5 h的Bi4Ti3O12活性最高;与HZSM-5机械混合使Bi4Ti3O12活性略有降低;HZSM-5抑制溶胶-凝胶法合成Bi4Ti3O12,导致其活性显著下降。

Powder Bi4Ti3O12 photocatalysts was prepared by sol-gel method. The effects of calcinations＇ temperature and calcinations＇ time on activity of Bi4Ti3O12 were studied in order to determine the optimal preparation condition. Supported catalysts of Bi4Ti3O12/HZSM-5 were prepared by mechanical mixing and sol-gel method using HZSM-5 as the support. The results show that Bi4Ti3Ol2 calcinated at 700℃ for 5 h has the highest activity. Mechanical mixing with HZSM-5 reduces the activity of Bi4Ti3O12 slightly. HZSM-5 inhibits the formation of Bi4Ti3O12 during the sol-gel process, resulting in a significant decrease in its activity.