Reduced graphene oxide wrapped Bi2WO6 hybrid with ultrafast charge separation and improved photoelectrocatalytic performance

被引：63
作者：
Wang, Huan [1 ]
Liang, Yinghua [1 ,2 ]
Liu, Li [2 ]
Hu, Jinshan [2 ]
Cui, Wenquan [2 ]
机构：
[1] Hebei Univ Technol, Sch Chem Engn & Technol, Tianjin 300130, Peoples R China
[2] North China Univ Sci & Technol, Coll Chem Engn, Tangshan 063009, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2017年 / 392卷
基金：
中国国家自然科学基金;
关键词：
Photoelectrocatalysis; Reduced graphene oxide; Bi2WO6; Hybridization; Organic pollutant; ENHANCED PHOTOCATALYTIC DEGRADATION; FILM ELECTRODE; RHODAMINE-B; EFFICIENT; COMPOSITE; ELECTROOXIDATION; PHOTOACTIVITY; IRRADIATION; CONVERSION; OXIDATION;
D O I：
10.1016/j.apsusc.2016.08.068
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：
A reduced graphene oxide (rGO) wrapped Bi2WO6 (Bi2WO6@rGO) hybrid as photoelectrode for enhanced photoelectrocatalytic (PEC) degradation of organic pollutants is reported, which exhibited excellent charge separation and photoconversion efficiency. The core@shell structured Bi2WO6@rGO photoelectrode yielded a pronounced 1.56-fold and 23.8-fold photocurrent density at 1.0V vs. saturated calomel electrode (SCE), than that of loading structured Bi2WO6-rGO and pure Bi2WO6. The Bi2WO6@rGO hybrid exhibited enhanced photoelectrocatalytic efficiency for degradation of Rhodamine B (RhB), which was 43.0% and 65.6% higher than that of photocatalytic (PC) and electrocatalytic (EC) processes, respectively. The enhancement in PEC degradation of RhB benefited from: (1) a strong interaction and a wide range of conjugation were formed in the core@shell system; (2) a 0.26 V of flat band potential was negatively shifted in case of Bi2WO6@rGO composite; (3) the photogenerated electrons and holes could be spatially separated by external electric potentials. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：51 / 60
页数：10
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