片状Bi/Bi_2WO_6光催化剂的制备及其可见光响应活性

Synthesis of Flake-Like Bi/Bi_2WO_6 Photocatalyst with Visible-light-responsive Photocatalytic Activity

以硝酸铋、钨酸铵为原料,通过水热法制得片状Bi2WO6,通过KBH4对Bi2WO6进行还原,生成Bi单质沉积在表面的Bi/Bi2WO6光催化剂。采用TEM,XRD和UV-Vis DRS分析了催化剂的组成、形貌和光吸收性能。以罗丹明B为模拟污染物,研究了所得Bi/Bi2WO6的可见光驱动催化活性。结果表明,Bi沉积可有效提高Bi2WO6可见光催化降解活性。

The flake-like Bi2 WO6 was prepared via a hydrothermal process.KBH4 was used to reduce Bi2 WO6 and Bi particals deposed on the surface of Bi2 WO6 .XRD, TEM and UV-Vis-DRS spectrums were employed to investigate the phase composition, morphology and photoabsorption property of as-fabricated Bi/Bi2 WO6.The visible-light-driven photocatalytic activities of the Bi/Bi2 WO6 were evaluated by the photodegradation of Rhodamine B （ RhB ） .The results showed that Bi particals deposition can enhance the photocatalytic activity of Bi2 WO6 .