Rational construction of Ag3PO4/WO3 step-scheme heterojunction for enhanced solar-driven photocatalytic performance of O2 evolution and pollutant degradation

被引：55
作者：
Li, Dongsheng [1 ]
Liu, Yong [1 ]
Yang, Yantao [1 ]
Tang, Guogang [2 ]
Tang, Hua [1 ,3 ]
机构：
[1] Jiangsu Univ, Sch Chem & Chem Engn, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Changzhou Inst Ind Technol, Changzhou 213164, Jiangsu, Peoples R China
[3] Qingdao Univ, Shandong Collaborat Innovat Ctr Marine Biobased F, State Key Lab Biofibers & Ecotext, Sch Environm Sci & Engn, Qingdao 266071, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 608卷
基金：
中国国家自然科学基金;
关键词：
WO3; Ag3PO4; S-scheme heterojunction; Photocatalytic oxygen evolution; Photocatalytic degradation; REDUCED GRAPHENE OXIDE; HIGHLY EFFICIENT; OXYGEN EVOLUTION; WATER; NANOPARTICLES; COMPOSITES; MECHANISM; GROWTH;
D O I：
10.1016/j.jcis.2021.10.178
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：
Heterojunction engineering has been regarded as a promising strategy to sufficiently utilizing photogenerated charge carriers, thus benefiting the improvement of photocatalytic performance. Herein, Ag3PO4/WO3 S-scheme heterojunction was synthesized via a simple deposition-precipitation pro-cess, and its photocatalytic activity was evaluated by monitoring water splitting and pollutant degrada-tion under visible light. As a result, Ag3PO4/WO3 with optimized ratio photocatalyst showed enhanced photocatalytic activity in oxygen production (306.6 mu mol.L-1.h(-1)) relative to pure Ag3PO4 (204.4 lmol.L-1.h(-1)). Additionally, it also exhibits rapid toxicity elimination efficiency over hexavalent chromium ions (Cr6+) and ciprofloxacin (CIP) with degrading rate of 72% and 83% within 30 min, respectively. According to a series characterization, a possible S-scheme photocatalytic mechanism of Ag3PO4/WO3 was demonstrated in detail, which endowed the heterojunction with strong redox abilities to provide powerful diving force towards the photocatalytic reaction. This work presents an innovative perspective to construct Ag3PO4-based S-scheme heterojunctions for boosting photocatalytic performance for various applications. (C) 2021 Elsevier Inc. All rights reserved.
引用
收藏
页码：2549 / 2559
页数：11
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