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

By Yajie Zhao, Y. Liu, Jingjing Cao, Hui Wang, Mingwang Shao, Hui Huang, Yang Liu, Zhenhui Kang. 2020

163 citations recorded by the source corpus.

Abstract 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 (λ ≥ 420 nm) with high efficiency (2641 μmol 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 O2 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.

Subfields: Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/455b846e9bdfad7ee3bd3e48ea832a9d892b275a