Issue 27, 2014

Programmed synthesis of magnetic mesoporous silica nanotubes with tiny Au nanoparticles: a highly novel catalyst system

Abstract

Magnetic mesoporous silica nanotubes were produced from carbon nanotubes using a well-controlled programmed synthesis method and were characterized by TEM, XRD, XPS, N2 adsorption–desorption and VSM. The well-designed nanotubes had a large specific surface area (1017 m2 g−1), a highly open mesoporous structure (∼3.2 nm) and high magnetization (18.6 emu g−1). Ultrafine gold nanoparticles were successfully supported on the thiol-modified nanotubes by a co-precipitation method. These unique multicomponent nanotubes showed high performance in the catalytic reduction of 4-nitrophenol (with a conversion of 99% in 6 min), and styrene epoxidation with high conversion (65%) and selectivity (58%). Interestingly, the new catalysts could be recovered by magnetic separation from the reaction mixture and could be recycled several times without any significant loss in activity. The unique nanostructure of the nanotubes resulted in a novel, stable and easy to use catalyst system for application in various industrial processes.

Graphical abstract: Programmed synthesis of magnetic mesoporous silica nanotubes with tiny Au nanoparticles: a highly novel catalyst system

Article information

Article type
Paper
Submitted
02 Mar 2014
Accepted
09 Apr 2014
First published
03 Jun 2014

J. Mater. Chem. A, 2014,2, 10485-10491

Programmed synthesis of magnetic mesoporous silica nanotubes with tiny Au nanoparticles: a highly novel catalyst system

X. Li, X. Zhu, Y. Fang, H. Yang, X. Zhou, W. Chen, L. Jiao, H. Huo and R. Li, J. Mater. Chem. A, 2014, 2, 10485 DOI: 10.1039/C4TA01063A

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