期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 40, 页码 12471-12477出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta12583a
关键词
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资金
- National Natural Science Foundation of China [51133002]
- National Basic Research Program of China [2012CB821503]
- National Science Fund for Talent Training in Basic Science [J1103310]
A facile and controllable method of immobilizing gold nanoparticles (AuNPs) on hollow silica particles (SiO(2)HPs) is proposed and the resultant SiO2HP/AuNP composite particles exhibit high catalytic activity. The carrier SiO(2)HPs decorated with amino groups are prepared in a W/O inverse emulsion, having a well-defined hollow structure, mesoporous wall and dense bush-like surface morphology. A large number of ultrafine AuNPs are generated via in situ reduction of chloroauric acid by the amino groups and firmly anchored on the bush-like silica shell. The structure and morphology of the composites are governed by changing the weight percentage of 3-aminopropyltriethoxysilane in the total amount of monomers (W-a), which have been extensively characterized. Benefiting from the unique multiple structures, the composite particles exhibited outstanding catalytic efficiency and repeatability, which are confirmed by two oxidation-reduction reactions of 2-nitroaniline/NaBH4 and 4-nitrophenol/NaBH4.
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