Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 234, Issue -, Pages 311-317Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2018.04.028
Keywords
Hierarchical heterostructure; Photocatalysis; Selective hydroxylation; Phenol; Bi2WO6/CdWO4
Funding
- NSFC [21725602, 21476065, 21671062, 21776064]
- Fundamental Research Funds for the Central Universities
- Hunan Provincial Natural Science Foundation [2015JJ3033]
- Hunan Provincial Science and Technology Project [2015JC3051]
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For the first time Bi2WO6/CdWO4 (BCW) hierarchical heterostructure of CdWO4 microrods decorated with uniform Bi2WO6 nanoplates was prepared. Using BCW as photocatalyst and O-2 as oxidant, we achieved satisfactory catalytic activity (benzene conversion 7.3% and selectivity of phenol > 99%) in the hydroxylation of benzene to phenol at room temperature. It was found that the unique hierarchical heterostructure is beneficial for the absorption of visible light and the separation of photoinduced charge carriers. Moreover, we confirm the pivotal role of hydroxyl radicals and propose a plausible mechanism for the hydroxylation reaction.
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