Visible light induced photocatalytic overall water splitting over micro-SiC driven by the Z-scheme system

被引：17
|
作者：
Wang, Da [1 ]
Guo, Zhongnan [1 ]
Peng, Yuan [1 ]
Yuan, Wenxia [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem, Beijing 100083, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2015年 / 61卷
基金：
中国国家自然科学基金;
关键词：
Nonmetallic material; Semiconductor; Silicon carbon; Z-scheme system; Overall water splitting; SHUTTLE REDOX MEDIATOR; 2-STEP PHOTOEXCITATION; CARBIDE NANOPARTICLES; O-2; H-2; MECHANISM; EVOLUTION; HYDROGEN; SURFACE;
D O I：
10.1016/j.catcom.2014.12.008
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：
We present the micro-sized SiC powder applying to overall water splitting under visible light irradiation without adding any sacrificial compounds. The stoichiometric amounts of H-2 and O-2 in 2:1 were obtained when using WO3 nanoparticle and Pt-loaded micro-SiC grains as the O-2 and Hy evolution photocatalysts, respectively. The relatively low efficiency step for splitting water reaction is the H+ reduction in the solution. Under optimal condition, the apparent quantum efficiency reaches up to 0.021% at 420 nm. Our results provide a method to enhance the photocatalytic activity of micro-sized SiC powder for overall water splitting using solar energy. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：53 / 56
页数：4
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