Self-assembly of Ag-TiO2 Nanoparticles: Synthesis, Characterization and Catalytic Application
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2012年第5期
论文作者：王新 刘孝恒
文章页码：847 - 851
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.
王新1,2，刘孝恒1
1. Key Laboratory of Soft Chemistry and Functional Materials of the Ministry of Education,Nanjing University of Science and Technology2. Chemistry and Materials Department of Chaohu College
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.
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