Efficient production of H2O2 via two-channel pathway over ZIF-8/C3N4 composite photocatalyst without any sacrificial agent

被引:150
作者
Zhao, Yajie [1 ]
Liu, Yan [1 ]
Cao, Jingjing [1 ]
Wang, Hui [1 ]
Shao, Mingwang [1 ]
Huang, Hui [1 ]
Liu, Yang [1 ]
Kang, Zhenhui [1 ]
机构
[1] Soochow Univ, Inst Funct Nano & Soft Mat Lab FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China
基金
中国国家自然科学基金;
关键词
Hydrogen peroxide (H2O2); Photocatalysts; Two-channel pathway; Oxygen reduction reaction; Water oxidant reaction; VISIBLE-LIGHT-DRIVEN; HYDROGEN-PEROXIDE PRODUCTION; CARBON NITRIDE; HIGHLY EFFICIENT; WATER; O-2; OXYGEN; PERFORMANCE; GENERATION; REDUCTION;
D O I
10.1016/j.apcatb.2020.119289
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
Hydrogen peroxide (H2O2) is a valuable chemical for various industries, while the current H2O2 production still suffers from multistep reaction processes, large consumption of organic solvents and waste-intensive. The photo-oxidation of water coupled with photo-reduction of oxygen is the cheapest and cleanest pathway to produce H2O2. Herein, we demonstrated that ZIF-8/C3N4 composite, as an efficient dual-channel photocatalyst, can produce H2O2 under visible light (lambda >= 420 nm) with high efficiency (2641 mu mol h(-1) g(-1)) at normal pressure and without any sacrificial agent. The apparent quantum efficiency (AQE) can be calculated to be 19.57 % at the wavelength of 420 nm. Notably, the concentration of H2O2 generated is up to 0.71 wt.% at 420 nm (10 mg catalyst with 15 mL O-2 saturated H2O), which is very close to the concentration of industrial production (1 wt.%) by anthraquinone method. Our work may provide a ultra-green pathway for the photo-production of H2O2 to meet industrial requirement.
引用
收藏
页数:7
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