One-step synthesis of CoO/g-C3N4 composites by thermal decomposition for overall water splitting without sacrificial reagents

被引:59
作者
Han, Mumei [1 ]
Wang, Huibo [1 ]
Zhao, Siqi [1 ]
Hu, Lulu [1 ]
Huang, Hui [1 ]
Liu, Yang [1 ]
机构
[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China
来源
INORGANIC CHEMISTRY FRONTIERS | 2017年 / 4卷 / 10期
基金
中国国家自然科学基金;
关键词
GRAPHITIC CARBON NITRIDE; HYDROGEN; PHOTOCATALYSTS; G-C3N4; NANOCRYSTALS; OXYGEN;
D O I
10.1039/c7qi00380c
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Using photocatalysts to split water into hydrogen and oxygen is a promising way to produce renewable energy. Efficient and stable photocatalysts are desired for overall water splitting under visible light. We demonstrate that the cobalt(II) oxide (CoO)/graphitic carbon nitride (CoO/g-C3N4) composites synthesized by a one-step thermal decomposition method exhibit enhanced photocatalytic efficiency for overall water splitting without sacrificial reagents. 10% CoO/g-C3N4 exhibits optimal photocatalytic performance, where H-2 and O-2 evolution rates are, respectively, 0.46 mu mol h(-1) and 0.21 mu mol h(-1) under visible light irradiation without any sacrificial reagents. It is worth mentioning that the H-2 and O-2 production almost approaches the stoichiometric ratio 2 : 1. The enhanced photocatalytic activity of CoO/g-C3N4 may be ascribed to the efficient charge separation and fast decomposition of H2O2 by CoO.
引用
收藏
页码:1691 / 1696
页数:6
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