Journal
NANO RESEARCH
Volume 4, Issue 11, Pages 1153-1162Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-011-0165-2
Keywords
Reduced graphene oxide; TiO2; silver; platinum; hybrid nanostructures; catalytic
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Funding
- National Natural Science Foundation of China [20820102037]
- National Basic Research Program of China (973 Program) [2009CB930100, 2010CB933600]
- China Postdoctoral Science Foundation [20090461047]
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We demonstrate an aqueous solution method for the synthesis of a Ag-TiO2-reduced graphene oxide (rGO) hybrid nanostructure (NS) in which the Ag and TiO2 particles are well dispersed on the rGO sheet. The Ag-TiO2-rGO NS was then used as a template to synthesize Pt-TiO2-rGO NS. The resulting hybrid NSs were characterized by transmission electron microscopy (TEM), high-resolution TEM (HRTEM), energy-dispersive X-ray (EDX) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, UV-vis spectroscopy, Raman spectroscopy, inductively coupled plasma mass spectrometry (ICP-MS), and catalytic studies. It was found that TiO2-rGO, Ag-TiO2-rGO and Pt-TiO2-rGO NSs all show catalytic activity for the reduction of p-nitrophenol to p-aminophenol by NaBH4, and that Pt-TiO2-rGO NS exhibits the highest catalytic activity as well as excellent stability and easy recyclability.
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