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

页码：53 / 56

页数：4

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