Bi_2WO_6@BiXO(Mo,P,V)对二氧化钛纳米管阵列的改性及光电性能研究

Preparation of Bi_2WO_6@BiXO(Mo,P,V) Sensitized TiO_2 Nanotube Arrays and the Enhanced Photoelectrochemical Performance

通过水热协助离子交换法制备了Bi_2WO_6@Bi_2MoO_6,Bi_2WO_6@Bi PO4,Bi_2WO_6@BiVO_4对二氧化钛纳米管阵列(TiO_2NTs)进行改性,显著提高了TiO_2NTs的光电转换和光催化性能. Bi_2WO_6@BiPO_4/TiO_2NTs表现出最佳的光催化性能和光电转换效率,罗丹明B的去除率达到70%,可见光瞬态光电流密度达到30. 74μA·cm^(-2),开路电压达到-0. 17 V·cm^(-2).高效光电化学性能是由Bi_2WO_6@BiPO_4敏化剂规则有序的花状结构、强太阳光吸收和快速的界面载流子迁移性能引起的.

The Bi2WO6@Bi2MoO6,Bi2WO6@BiPO4 and Bi2WO6@BiVO4 hybrid sensitizers were deposited on the surface of TiO2 nanotube arrays(TiO2 NTs)by the hydrothermal assited ion exchange methods,which significantly improved the photoelectric conversion and photocatalytic performances of TiO2 NTs.The Bi2WO6@BiPO4/TiO2 NTs photoelectrode showed the optimal photoelectrochemical property.The final efficiency for the photocatalytic degradation of RhB achieved 70%,the visible light photocurrent density achieved 30.74μA·cm^-2,and the open circuit voltage achieved-0.17 V·cm^-2.The excellent photoelectrochemical performance was ascribed to the uniform flower-like structure of Bi 2WO 6@BiPO 4,strong solar absorption and high charge carrier transportation at the photoelectrode interface.