Fabrication of Novel Double Z-Scheme Photocatalyst WO 3 -Ag 3 PO 4 -Bi 2 WO 6 with Excellent Visible Photocatalytic Activity
Fabrication of Novel Double Z-Scheme Photocatalyst WO 3 -Ag 3 PO 4 -Bi 2 WO 6 with Excellent Visible Photocatalytic Activity
复制标题
具有优异可见光催化活性的新型双Z型光催化剂WO 3 -Ag 3 PO 4 -Bi 2 WO 6 的制备
DOI：
10.11648/j.ijec.20180202.15
复制
发表时间：
2019-01
期刊：
影响因子：
--
通讯作者：
Jintao Zhang
中科院分区：
文献类型：
--
作者：
Hongjuan Hao;Dingze Lu;Jintao Zhang
采用一锅水热法制备了一种新型的含Ag3PO4、WO3和Bi2WO6的三元Z型光催化体系。用X射线粉末衍射仪、扫描电子显微镜、透射电子显微镜、紫外-可见漫反射光谱对WO_3-Ag_3PO_4-Bi2WO_6光催化剂进行了表征。以罗丹明B(RhB)为去除目标，WO_3-Ag3PO_4-B_2WO_6光催化性能优于BI_2WO_6和WO_3-B_2WO_6。WO3-Ag3PO4-Bi2WO6(0.2：0.3：1)光催化降解RhB的速率常数分别是纯Bi2WO6和WO3-Bi2WO6的1.9倍和1.3倍。在该体系中，光生载流子的有效分离和迁移是通过以Ag3PO4和WO3为电子给体的双Z方案电子转移机制实现的。Ag3PO4作为WO3和Bi2WO6之间的电荷传输桥梁，Z构型保留了Bi2WO6导带(CB)中具有高还原能力的电子和WO3价带(VB)中具有高氧化能力的空穴，从而提高了Ag3PO4的光催化活性和稳定性。本研究为提高有机污水等环境污染处理中易腐烂光催化剂的光催化和抗光腐蚀性能提供了新的视角。
A novel ternary Z-scheme photocatalytic system containing Ag3PO4, WO3 and Bi2WO6 was prepared by a one-pot hydrothermal method. The WO3-Ag3PO4-Bi2WO6 photocatalyst was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflection spectroscopy (DRS). Using Rhodamine B (RhB) as the target of elimination, WO3-Ag3PO4-Bi2WO6 exhibited outstanding photocatalytic compared with those of Bi2WO6 and WO3-Bi2WO6. The rate constants of photocatalytic degradation of RhB for WO3-Ag3PO4-Bi2WO6 (0.2:0.3:1) was 1.9 and 1.3 times that of pure Bi2WO6 and WO3-Bi2WO6. In this system, the efficient separation and migration of the photoinduced current carriers was realized through a double Z-scheme electron-transfer mechanism in which the Ag3PO4 and WO3 acted as electron donor. The Ag3PO4 served as a charge transmission bridge between the WO3 and the Bi2WO6, and the Z-scheme kept the electrons with high reducing capability in the conduction band (CB) of Bi2WO6 and the holes with high oxidation capability in the valence band (VB) of WO3, thereby enhancing the photocatalytic activity and stability of Ag3PO4. The present study provided a new perspective for enhancing photocatalytic and anti-photocorrosion performances in perishable photocatalysts for organic sewage and other environmental contamination treatments.
登录
查看更多内容
影响因子：
3.7
作者：
Ge, Ming;Li, Yafei;Chen, Wei
通讯作者：
Chen, Wei
Zn2 掺杂 Bi2MoO6 纳米片的简便水热合成并提高光催化活性
影响因子：
3.9
作者：
Zhang Xiang-Biao;Zhang Lei;Hu Jin-Song;Huang Xin-Hua
通讯作者：
Huang Xin-Hua
影响因子：
4.2
作者：
Eswar, Neerugatti Krishna Rao;Katkar, Venktesh V.;Madras, Giridhar
通讯作者：
Madras, Giridhar
影响因子：
22.1
作者：
Cui, Can;Wang, Yaping;Yang, Yu
通讯作者：
Yang, Yu
影响因子：
6.7
作者：
Wan Wang;H. Du;Rui-Xia Wang;T. Wen;A. Xu
通讯作者：
Wan Wang;H. Du;Rui-Xia Wang;T. Wen;A. Xu