Article Title

One-pot synthesis of thermally stable gold@mesoporous silica core-shell nanospheres with catalytic activity

Authors

Junchen Chen, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
Renyuan Zhang, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
Lu Han, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
Bo Tu, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
Dongyuan Zhao, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China

Keywords

core–shell nanostructures, gold, mesoporous silica, synthesis, catalysis

Abstract

ABSTRACT A facile one-pot method has been developed to synthesize uniform gold@mesoporous silica nanospheres (Au@MSNs), which have a well-defined core–shell structure with ordered mesoporous silica as a shell. The resulting Au@MSNs have a high surface area (~521 m2/g) and uniform pore size (~2.5 nm) for the mesoporous silica shell. The diameter of the gold core can be regulated by adjusting the amount of HAuCl4. The catalytic performance of the Au@MSNs was investigated using the reduction of 4-nitrophenol as a model reaction. The mesopores of the silica shells provide direct access for the reactant molecules to diffuse and subsequently interact with the gold cores. In addition, the Au@MSNs display the great advantage of sintering-resistance to 950 °C because the mesoporous silica shells inhibit aggregation or deformation of the gold cores. The high thermal stability enables the Au@MSNs to be employed in high-temperature catalytic reactions.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-013-0363-1

Publisher

Tsinghua University Press

Recommended Citation

Junchen Chen,Renyuan Zhang,Lu Han,Bo Tu,Dongyuan Zhao, One-pot synthesis of thermally stable gold@mesoporous silica core-shell nanospheres with catalytic activity. NanoRes.null