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RuO₂包覆的TiO₂纳米复合粒子的表面与界面分析

Surface and Interface Analysis of RuO₂-coated TiO₂ Nano-composite Particles

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【Author】 LIU Li-ming~1,LIN Zhi-dong~2,ZHANG Wang-rong~3,YANG Pei-zhi~1,HUANG Zong-tan~1(1.Kunming Institute of Physics,Kunming 650223,China;2.School of Materials Science & Technology,Wuhan Institute of Technology,Wuhan 430073,China;3.School of Electronic Information & Control Engineering,Beijing University of Technology,Beijing 100022,China)

【机构】昆明物理研究所；武汉工程大学材料科学与工程学院；北京工业大学电子信息与控制工程学院；昆明物理研究所云南昆明650223；湖北武汉430073；北京100022；云南昆明650223；

【摘要】将溶胶-凝胶法与水热合成技术相结合制备了RuO2包覆量为1.5%的TiO2纳米复合粒子,并采用X射线衍射(XRD)、原子力显微镜(AFM)、傅立叶变换红外光谱(FT-IR)及X射线光电子能谱(XPS)详细研究了纳米复合粒子的表面与界面性质。结果表明,RuO2以非晶态高度分散在TiO2纳米粒子表面形成包覆层,TiO2的晶型为锐钛矿型;纳米复合粒子呈球形,平均粒径约为47.5nm,RuO2包覆层的平均厚度约为0.75nm;RuO2包覆层与核材料TiO2纳米粒子表面存在化学键的作用,这种化学包覆有利于提高纳米复合粒子结构和性能的稳定性。更多还原

【Abstract】 TiO₂ nano-composite particles coated with 1.5%（mass percent） RuO₂ are obtained successfully by sol-gel method combined with hydrothermal synthesizing method.The surface and interface properties of the nano-composite material are analyzed in detail using many test technologies,including X-ray diffraction（XRD）,atomic force microscope（AFM）,Fourier transform infrared spectrum（FT-IR） and X-ray photoelectron spectroscopy（XPS）.The results show that TiO₂ nano-particles are coated with amorphous RuO₂,and the crystal structure of TiO₂ is anatase.These nano-composite particles are spherical,and the mean particle size is about 47.5nm,with a mean thickness of coating layer of about 0.75nm.There exists chemical bonding between the interface of RuO₂（coating layer） and TiO₂ nano-particle（core material）,so the coating type belongs to chemical type,which benefits structure and property stability of the nano-composite particles.更多还原