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Open Access Nano Express

Preparation of uniform magnetic recoverable catalyst microspheres with hierarchically mesoporous structure by using porous polymer microsphere template

Lianbing Ren1, Chao Teng1, Lili Zhu1, Jie He1, You Wang2, Xinbing Zuo3, Mei Hong1*, Yong Wang1*, Biwang Jiang1* and Jing Zhao14*

Author Affiliations

1 Shenzhen Key Lab of Nano-Micro Materials Research, School of Chemical Biology & Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China

2 Shenzhen Middle School, Shenzhen 518000, China

3 Shenzhen State High-tech Industrial Innovation Center, Shenzhen 518000, China

4 State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210093, China

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Nanoscale Research Letters 2014, 9:163  doi:10.1186/1556-276X-9-163

Published: 4 April 2014

Abstract

Merging nanoparticles with different functions into a single microsphere can exhibit profound impact on various applications. However, retaining the unique properties of each component after integration has proven to be a significant challenge. Our previous research demonstrated a facile method to incorporate magnetic nanoparticles into porous silica microspheres. Here, we report the fabrication of porous silica microspheres embedded with magnetic and gold nanoparticles as magnetic recoverable catalysts. The as-prepared multifunctional composite microspheres exhibit excellent magnetic and catalytic properties and a well-defined structure such as uniform size, high surface area, and large pore volume. As a result, the very little composite microspheres show high performance in catalytic reduction of 4-nitrophenol, special convenient magnetic separability, long life, and good reusability. The unique nanostructure makes the microspheres a novel stable and highly efficient catalyst system for various catalytic industry processes.