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

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 278卷

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

页数：7

共 48 条

[21] A 4e--2e- cascaded pathway for highly efficient production of H2 and H2O2 from water photo-splitting at normal pressure [J].