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Preparation of TiO2-ZrO2/Au/CeO2 hollow sandwich-like nanostructure for excellent catalytic activity and thermal stability

Abstract

This work reports a novel type of sandwich-like hollow Au-based nanocatalyst, including a TiO2-ZrO2 shell, a hollow CeO2 core and Au nanoparticles of 2–5 nm. Uniform crystal ceria hollow nanostructure were synthesized by a simple one-step hydrothermal method without template. Then the binary TiO2-ZrO2 coated Au nanocatalyst was prepared via a facile bottom-up synthesis method. The structural features of catalysts were characterized by several techniques, including SEM, TEM, EDX, FTIR, BET, XRD, UV–vis and XPS analyses. Using the reduction of 4-nitrophenol by NaBH4 as a model reaction, TiO2-ZrO2/Au/CeO2 microspheres showed a superior catalytic activity and thermal stability compared with a pure TiO2 or ZrO2 layer. Besides, the calcined TiO2-ZrO2/Au/CeO2 microspheres at 700 ℃ presented the highest thermal stability and reactivity. This comparative results were mainly attributed to the synergistic effect among mixed oxide, hollow CeO2 core and Au NPs and the sandwich-like structure. As a consequence, the unique nanocatalyst will open a promising way in the fabrication of the hollow binary-metal-oxide materials for future research and has great potential in other applications.

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Publication details

The article was accepted on 08 Oct 2017 and first published on 09 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ03639F
Citation: New J. Chem., 2017, Accepted Manuscript
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    Preparation of TiO2-ZrO2/Au/CeO2 hollow sandwich-like nanostructure for excellent catalytic activity and thermal stability

    M. Huang, Y. Zhang, Y. Zhou, J. Fang, C. Zhang, S. Zhao, Y. gao and X. Sheng, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03639F

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