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Self-assembly of Ag-TiO_2 Nanoparticles: Synthesis, Characterization and Catalytic Application

Self-assembly of Ag-TiO_2 Nanoparticles: Synthesis, Characterization and Catalytic Application
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摘要 The formation of Ag clusters on titanium oxide (TiO2) nanoparticles was achieved by self-assembly process and calcination. The obtained nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and ultraviolet visible spectroscopy (UV-Vis), and conventional techniques (XRD, TEM and UV-Vis) were used to identify Ag particles on the TiO2 surfaces. The results show that Ag-TiO2 particles can be applied to improve catalytic activity of the epoxidation of styrene oxides. Styrene oxide is the main product of catalytic reaction with H2O2 as the oxidant by using Ag-TiO2 nanoparticles as catalysts. High catalytic activitity of styrene oxide can be obtainable at 80 ℃. The reaction temperature, reaction time, the molar ratio of H2O2/styrene and solvent affect greatly the catalytic epoxidation of styrene. The formation of Ag clusters on titanium oxide (TiO2) nanoparticles was achieved by self-assembly process and calcination. The obtained nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and ultraviolet visible spectroscopy (UV-Vis), and conventional techniques (XRD, TEM and UV-Vis) were used to identify Ag particles on the TiO2 surfaces. The results show that Ag-TiO2 particles can be applied to improve catalytic activity of the epoxidation of styrene oxides. Styrene oxide is the main product of catalytic reaction with H2O2 as the oxidant by using Ag-TiO2 nanoparticles as catalysts. High catalytic activitity of styrene oxide can be obtainable at 80 ℃. The reaction temperature, reaction time, the molar ratio of H2O2/styrene and solvent affect greatly the catalytic epoxidation of styrene.
作者 王新 刘孝恒
出处 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第5期847-851,共5页 武汉理工大学学报(材料科学英文版)
基金 the Natural Science Foundation of Jiangsu Province(No.BK2011024) the Scientific Research Project of Chaohu College(No.XLZ-200902)
关键词 self-assembly Ag-TiO2 nanoparticles catalysis self-assembly Ag-TiO2 nanoparticles catalysis
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