Bi_2O_2CO_3/TiO_2复合粉体的制备及其光催化性能研究

Preparation and photocatalytic activities of Bi_2O_2CO_3/TiO_2 composite powders

采用水热法制备了Bi2O2CO3,并将其与TiO2进行了复合。XRD数据表明此复合光催化剂中Bi2O2CO3结晶性良好,紫外-可见漫反射光谱说明Bi2O2CO3的加入使其吸收带边有一定的红移。研究了紫外-可见光照射下Bi2O2CO3/TiO2复合光催化剂对亚甲基蓝溶液的降解性能,结果表明当Bi2O2CO3与TiO2的质量比为0.032时,得到性能最优的复合光催化剂,其光催化活性优于TiO2。

Bi20e CO3 was prepared using hydrothermal method,then it was composited with TiO2 o The XRD re- suits indicate that the Bi2 OeCO3 in this composite photocatalyst was in good crystaIIinity. The UV-Visible dif- fusion-reflection spectra results show that the adding of Bi2 OeCO3 makes the absorption edge of the composite powders red shift. The photocatalytic activities of the Bi2 02 CO3/TiO2 composite powders were evaluated by the photodegradation of methylene blue under the UV-Visible powders show a higher photocatalytic activity than TiOe. light irradiation. The results indicate the composite The optimal photocatalytic activity can be obtained when the mass ratio was m（Bi2O2CO3） ： m（TiO2）=0.032