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Issue 102, 2016, Issue in Progress
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Synthesis of a hollow CeO2/Au/C hierarchical nanostructure for high catalytic activity and recyclability

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Abstract

We report uniform hollow CeO2/Au/C nanocatalysts with hierarchical structures fabricated successfully via an etching process. The whole preparation method involves the synthesis of SiO2 spheres, a sequential deposition of CeO2, Au NPs of 2–5 nm and then C layers through hydrothermal processes, crystallization of C by calcination and finally etching of the inner silica spheres to construct the hollow structures. The as-obtained nanostructures are characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD), UV-Vis spectroscopy and energy dispersion X-ray spectroscopy (EDX). The CeO2/Au/C composite shows a multilayer structure including the hollow ceria spheres and the C layers, where Au NPs are located between the two layers. In this work, the reduction of 4-NP is employed as a model reaction to test the catalytic performance. The results indicate that the hollow CeO2/Au/C nanospheres exhibit a higher catalytic performance, comparing with the hollow CeO2/Au and Au/C nanospheres. The presences of the C shells and CeO2 layers can improve the catalytic activity. In addition, the hollow CeO2/Au/C structures can be easily recycled without an obvious decrease of the catalytic activities in the reaction.

Graphical abstract: Synthesis of a hollow CeO2/Au/C hierarchical nanostructure for high catalytic activity and recyclability

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Publication details

The article was received on 21 Sep 2016, accepted on 17 Oct 2016 and first published on 17 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA23521B
Citation: RSC Adv., 2016,6, 100427-100436
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    Synthesis of a hollow CeO2/Au/C hierarchical nanostructure for high catalytic activity and recyclability

    B. Ding, Y. Zhou, M. He, T. Huang, S. Li, S. Huang and W. Pan, RSC Adv., 2016, 6, 100427
    DOI: 10.1039/C6RA23521B

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