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Selective Photocatalytic Benzene Hydroxylation to Phenol Using Surface-Modified Cu2O Supported on Graphene

Abstract

The photocatalytic activity for benzene hydroxylation to phenol by hydrogen peroxide has been evaluated using a series of photocatalysts based on defective graphene. The series includes defective graphene containing or not Au and Cu2O nanoparticles. The later exhibits the highest activity, but a very low phenol yield as consequence of the occurrence of a large degree of mineralization. A considerably increase in phenol selectivity was achieved by modifying the surface of the Cu2O nanoparticles supported on defective graphene with long-chain alkanethiols. Under the optimal conditions using an octanethiol-modified Cu2O-graphene photocatalyst, a selectivity to phenol about 64 % at 30 % benzene conversion was achieved. This remarkable selectivity was proposed to derive from the larger hydrophobicity of the alkanethiol-modified Cu2O-graphene photocatalyst that favors the preferential benzene adsorption versus adsorption of phenol and hydroxybenzenes.

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Publication details

The article was received on 23 Jul 2018, accepted on 11 Sep 2018 and first published on 13 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07095D
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Selective Photocatalytic Benzene Hydroxylation to Phenol Using Surface-Modified Cu2O Supported on Graphene

    J. He, M. Zhang, A. Primo, H. Garcia and Z. Li, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA07095D

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