Assembly of Ag3PO4 nanoparticles on rose flower-like Bi2WO6 hierarchical architectures for achieving high photocatalytic performance

作者：Zheng, Chengxiang; Yang, Hua^*

来源：Journal of Materials Science: Materials in Electronics , 2018, 29(11): 9291-9300.

DOI：10.1007/s10854-018-8959-6

• P-N HETEROJUNCTION
• ROOM-TEMPERATURE
• DEGRADATION
• SEMICONDUCTOR
• PARTICLES
• MECHANISM
• POWDER
• ROUTE
• BIVO4

In this work, we attempted to assemble Ag3PO4 nanoparticles on the surface of rose flower-like Bi2WO6 hierarchical architectures to form Ag3PO4/Bi2WO6 p-n heterojunction. First, rose flower-like Bi2WO6 hierarchical architectures were synthesized via a hydrothermal route. Then, Ag3PO4 nanoparticles were assembled on the surface of Bi2WO6 hierarchical architectures via an ion-exchange method. The as-prepared Ag3PO4/Bi2WO6 composites were systematically characterized by means of XRD, SEM, TEM, XPS, UV-Vis DRS, EIS and photocurrent response. It is demonstrated that the composites exhibit an enhanced separation efficiency of photogenerated electron-hole pairs, which is attributed to the carrier transfer between Ag3PO4 and Bi2WO6. Rhodamine B was chosen as the target organic pollutant to evaluate the photocatalytic activity of Ag3PO4/Bi2WO6 composites under simulated sunlight irradiation. It is revealed that the composites exhibit a significantly enhanced photocatalytic activity compared to bare Bi2WO6. The first-order reaction rate constant suggests that the photo-catalytic activity of 20wt%Ag3PO4/Bi2WO6 composite with 20% Ag3PO4 content is about ten times higher than that of bare Bi2WO6. The involved photocatalytic mechanism was discussed.

• 出版日期2018-6
• 单位兰州理工大学