Aqueous-phase synthesis of Ag-TiO2-reduced graphene oxide and Pt-TiO2-reduced graphene oxide hybrid nanostructures and their catalytic properties
Reduced graphene oxide, TiO2, silver, platinum, hybrid nanostructures, catalytic
ABSTRACT 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.
Tsinghua University Press
Ping Wang,Lei Han,Chengzhou Zhu,Yueming Zhai,Shaojun Dong, Aqueous-phase synthesis of Ag-TiO2-reduced graphene oxide and Pt-TiO2-reduced graphene oxide hybrid nanostructures and their catalytic properties. NanoRes.2011, 4(11): 1153-1162