Issue 13, 2013
From the journal:

Nanoscale

Preparation of yolk–shell FexOy/Pd@mesoporous SiO2 composites with high stability and their application in catalytic reduction of 4-nitrophenol†

Tongjie Yao,ac   Tieyu Cui,*a   Xue Fang,a   Fang Cuia  and  Jie Wu*b  

* Corresponding authors

a The Academy of Fundamental and Interdisciplinary Science, Harbin Institute of Technology, Harbin, Heilongjiang 150080, People's Republic of China
E-mail: cuit@hit.edu.cn

b Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, People's Republic of China
E-mail: wujieeasy@163.com

c State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, People's Republic of China

Abstract

Yolk–shell composites with a movable FexOy core and mesoporous SiO2 (mSiO2) shell, together with Pd nanoparticles uniformly anchoring on the inner surface, were prepared. The structure and composition of as-prepared catalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller measurement and Fourier-transform infrared spectroscopy, respectively. They are ideal candidates as nanoreactors for heterogeneous catalysis due to their special structure. The catalytic performance of FexOy/Pd@mSiO2 composites was studied by the reduction of 4-nitrophenol with NaBH4 as a reducing agent. Their reaction rate constant was calculated according to the pseudo-first-order reaction equation. The catalysts could be easily recycled by an external magnetic field due to their superparamagnetic property. Besides good catalytic property, another merit of FexOy/Pd@mSiO2 composites was high stability. We have compared the stability between FexOy/Pd@mSiO2 and Fe3O4@C/Pd composites by ultrasonic treatment and HNO3 solution etching, the stability of the former was much better than the later.

Graphical abstract: Preparation of yolk–shell FexOy/Pd@mesoporous SiO2 composites with high stability and their application in catalytic reduction of 4-nitrophenol

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Article information

DOI
https://doi.org/10.1039/C3NR01470C
Article type
Paper
Submitted
25 Mar 2013
Accepted
24 Apr 2013
First published
29 Apr 2013

Nanoscale, 2013,5, 5896-5904

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Preparation of yolk–shell FexOy/Pd@mesoporous SiO2 composites with high stability and their application in catalytic reduction of 4-nitrophenol

T. Yao, T. Cui, X. Fang, F. Cui and J. Wu, Nanoscale, 2013, 5, 5896 DOI: 10.1039/C3NR01470C

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