Issue 5, 2017

Multi-shelled ceria hollow spheres with a tunable shell number and thickness and their superior catalytic activity

Abstract

In this work, ceria multi-shelled nanospheres with a tunable shell number and thickness were prepared by a facile coordination polymer (CP) precursor method without the use of any template and surfactant. Interestingly, the number, thickness and structure of the shell can be tuned by varying the reaction time, reaction temperature, ratio of reagent and calcination temperature. The formation process of the multi-shelled hollow spheres was also investigated, which experienced a core contraction and shell separation process. Moreover, the multi-shelled CeO2 hollow nanospheres displayed excellent photocatalytic activity in the degradation of RhB. Au and AuPd nanoparticle loaded multi-shelled CeO2 nanocomposites were also prepared. Results show that Au/CeO2 multi-shelled hollow nanospheres showed eximious catalytic activity for the reduction of p-nitrophenol with a reaction rate constant k of 0.416 min. In addition, AuPd/CeO2 exhibited a remarkable catalytic activity for the conversion of CO. Employing this method, heavy rare earth oxide multi-shelled structures and light rare earth oxide solid spheres were obtained. This method may be employed for the preparation of other materials with complex structures.

Graphical abstract: Multi-shelled ceria hollow spheres with a tunable shell number and thickness and their superior catalytic activity

Supplementary files

Article information

Article type
Paper
Submitted
19 Nov 2016
Accepted
01 Jan 2017
First published
02 Jan 2017

Dalton Trans., 2017,46, 1634-1644

Multi-shelled ceria hollow spheres with a tunable shell number and thickness and their superior catalytic activity

Y. Liao, Y. Li, L. Wang, Y. Zhao, D. Ma, B. Wang, Y. Wan and S. Zhong, Dalton Trans., 2017, 46, 1634 DOI: 10.1039/C6DT04402F

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