Enhanced photocatalytic activity of Bi25FeO40-Bi2WO6 heterostructures based on the rational design of the heterojunction interface
Enhanced photocatalytic activity of Bi25FeO40-Bi2WO6 heterostructures based on the rational design of the heterojunction interface
复制标题
基于异质结界面合理设计的Bi25FeO40-Bi2WO6异质结构光催化活性增强
DOI：
10.1039/c6ra00334f
复制
发表时间：
2016
期刊：
影响因子：
3.9
通讯作者：
Sheng SD
中科院分区：
文献类型：
--
作者：
Zhang Lei;Zou Yue;Song Jian;Pan Cheng-Ling;Sheng Shao-Ding;Zhang Lei;Hou Chang-Min;Pan CL;Sheng SD
Based on the rational design of the heterojunction interface, a novel and efficient Bi25FeO40–Bi2WO6 heterostructure photocatalyst was successfully constructed by a facile hydrothermal process, using pre-fabricated Bi2WO6 nanoflakes as Bi3+ source and the second-phase material. The as-prepared photocatalyst was characterized by powder X-ray diffraction (XRD), FT-IR spectrum, energy dispersive spectrometry (EDS), X-ray photoelectron spectrum (XPS), high resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM). The photocatalytic performance of the Bi25FeO40–Bi2WO6 heterostructure under the UV-visible light irradiation was investigated, which showed that such Bi25FeO40–Bi2WO6 heterojunctions possessed a higher photocatalytic ability than the mechanical mixing product and the single-phase sample (Bi25FeO40 and Bi2WO6). This enhanced photocatalytic efficiency might be attributed to the matching band positions, close interfacial connection, and “face-to-face” contact mode of heterojunction interface. In addition, a possible photocatalytic decomposition mechanism and the separation process of photoinduced electrons and holes were discussed at length.
