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Formation Mechanistism Study of TiO2 Film Comprising Nanotubes and Nanoparticles
Di Yang*,Yi-quan Wang,Guo-bin Ren,Shuai Feng,Yuan-yuan Chen,Wen-zhong Wang
Author NameAffiliationE-mail
Di Yang* College of Science, Minzu University of China, Beijing 100081, China yangdi@semi.ac.cn 
Yi-quan Wang College of Science, Minzu University of China, Beijing 100081, China  
Guo-bin Ren College of Science, Minzu University of China, Beijing 100081, China  
Shuai Feng College of Science, Minzu University of China, Beijing 100081, China  
Yuan-yuan Chen College of Computer and Information Engineering, Technology and Business University, Beijing 100048, China  
Wen-zhong Wang College of Science, Minzu University of China, Beijing 100081, China  
Abstract:
A novel titanium dioxide (TiO2) film comprising both nanotubes and nanopaticles was fab-ricated by an anodization process of the modified titanium. The local electric field at the anodized surface was simulated and its influence on the morphology of the TiO2 film was discussed. The results show that the electric field strength is enhanced by the covering. The growth rate of TiO2 increases with the assist of the local electric field. However, TiO2 dis-solution is hindered since the local electric field prevents [TiF6]6- from diffusing. It means that the balance condition for the formation of nanotubes is broken, and TiO2 nanoparticles are formed. Moreover, the crystal structure of the TiO2 film was confirmed using X-ray diffraction and Raman analysis. The anatase is a main phase for the proposed film.
Key words:  Anodization, TiO2 film, Nanotube
FundProject:
由纳米管和纳米颗粒构成的TiO2膜的制备与机理研究
杨笛*,王义全,任国斌,冯帅,陈媛媛,王文忠
摘要:
采用聚苯乙烯小球修饰Ti片表面,并进行阳极氧化,制备出一种由纳米颗粒和纳米管构成的TiO2膜.通过数值模拟,分析了氧化表面附近的局部电场分布对TiO2膜形貌的影响.结果表明,覆盖物增强了局部电场,从而加快了O2-与Ti的反应速率,有利于TiO2的生长;与此同时,[TiF6]6-的扩散受到阻碍,使得TiO2的溶解速率减慢.可见,覆盖物打破了TiO2纳米管形成的平衡条件,导致纳米颗粒的生成.此外,通过X射线衍射和Raman光谱的测试分析发现,所制备的TiO2为锐钛矿结构.
关键词:  阳极氧化,TiO2膜,纳米管
DOI:10.1088/1674-0068/25/01/91-95
分类号: