In situ synthesis of Z-scheme Ag3PO4/CuBi2O4 photocatalysts and enhanced photocatalytic performance for the degradation of tetracycline under visible light irradiation

被引：259
作者：
Shi, Weilong [1 ]
Guo, Feng [2 ]
Yuan, Songliu [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
[2] Changan Univ, Sch Environm Sci & Engn, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Minist Educ, Xian 710064, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2017年 / 209卷
基金：
中国国家自然科学基金;
关键词：
Photocatalysts; Z-scheme system; Tetracycline; Environmental remediation; HIGHLY EFFICIENT; SOLID-STATE; SYSTEM; COMPOSITES; REMOVAL; CUBI2O4; NANOCOMPOSITE; NANOJUNCTION; OPTIMIZATION; ANTIBIOTICS;
D O I：
10.1016/j.apcatb.2017.03.048
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The Ag3PO4/CuBi2O4 (ACBO) composites with a small quantity of Ag3PO4 nanoparticles (0.5-10 wt.%) were synthesized by an in situ precipitation method and characterized by XRD, SEM, EDS, TEM, BET, XPS, UV-vis absorption spectra, PL, EIS and ESR analysis. Obviously, all the ACBO photocatalysts exhibited significantly enhanced photocatalytic performances. Meanwhile, ACBO with 5 wt.% content of Ag3PO4 (ACBO-5) showed the highest photocatalytic activity, which is around 2.79 and 2.16-fold higher than that of pristine Ag3PO4 and CuBi2O4, respectively. The enhanced photocatalytic activity could be due to the efficient separation of photogenerated electron-hole pairs through the formation of Z-scheme system composed of Ag3PO4, Ag and CuBi2O4, in which a small quantity of reducible Ag nanoparticles acted as the charge transmission-bridge. Moreover, the high photocatalytic stability of as-synthesized ACBO heterojunction photocatalyst was obtained through five successive cycling experiments. Finally, a possible photocatalytic mechanism was also discussed. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：720 / 728
页数：9
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