期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 304, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120999
关键词
Photocatalysis; Phenol production; Hydroxylation reaction; Charge separation; Photo-fenton
资金
- NSFC [21972022, 22072021, U1805255]
- 111 Project [D16008]
The encapsulation of ZFO with carbons enhances its photocatalytic activity and durability by protecting ZFO from corrosion and metal leaching, facilitating charge separation, and increasing benzene adsorption. The resulting ZFO@C photocatalyst is expected to have broad applications in green synthesis of fine chemicals.
Hydroxylation of benzene to phenol over a photocatalyst is a green approach toward phenol production. ZnFe2O4 (ZFO) with an intrinsic peroxidase-like catalytic behavior toward H2O2 activation is an emerging photocatalyst for benzene hydroxylation reaction; however, its catalytic performance is greatly limited by the fast charge recombination, inevitable metal leaching and hydrophilic surface structure. Herein, the encapsulation of ZFO by carbons (ZFO@C) is an effective solution to address these issues. The carbons conformably coating on ZFO not only protect them from corrosion and metal leaching, but also enable the generation of a strong electronic contact between them to facilitate charge separation. In addition, the carbons also increase the surface affinity for benzene adsorption. As a result, ZFO@C exhibited a significant enhanced photocatalytic activity and durability for phenol synthesis. Furthermore, ZFO@C with carbon derived unique functionalities will have a broad application in photocatalytic green synthesis of fine chemicals.
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