Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (7): 1117-1123.DOI: 10.1016/S1872-2067(14)60310-7

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Bottom-up preparation of gold nanoparticle-mesoporous silica composite nanotubes as a catalyst for the reduction of 4-nitrophenol

Yongsheng Penga,b, Wenguang Lengb, Bin Dongb, Rile Geb, Hongdong Duana, Yan’an Gaob   

  1. a School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, China;
    b Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2015-01-07 Revised:2015-02-07 Online:2015-06-12 Published:2015-07-30
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21273235, 21303076, and 21403214) and the 100 Talents Program of the Chinese Academy of Sciences.

Abstract:

Gold (Au) nanoparticle (NP)-mesoporous silica (SiO2) composite nanotubes were prepared by a bottom-up approach, in which Au NPs were anchored to the inner wall of mesoporous SiO2 tubular shells. In this composite, the agglomeration, exfoliation, and grain growth of Au NPs were restricted, and the loading and size of the catalyst NPs were easily tuned. The mesoporous shell, open ends, and one-dimensional passage of the SiO2 nanotubes all promote the diffusion of reactants, which enhanced the catalytic efficiency of this composite in the reduction of 4-nitrophenol. The Au NP-mesoporous SiO2 composite nanotubes also demonstrated good reusability, and no leaching or agglomeration of the Au NPs was observed during the catalytic reaction.

Key words: Gold, Mesoporous silica, Nanotube, Bottom-up approach, Catalyst, 4-Nitrophenol reduction