Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 278, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119289
Keywords
Hydrogen peroxide (H2O2); Photocatalysts; Two-channel pathway; Oxygen reduction reaction; Water oxidant reaction
Funding
- National MCF Energy RD Program [2018YFE0306105]
- Innovative Research Group Project of the National Natural Science Foundation of China [51821002]
- National Natural Science Foundation of China [51725204, 21771132, 51972216, 52041202]
- Natural Science Foundation of Jiangsu Province [BK20190041, BK20190828]
- Key-Area Research and Development Program of GuangDong Province [2019B010933001]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- 111 Project
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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.
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