多孔钛基体上TiO_2纳米管阵列的制备及其形成机理研究(英文)  

Preparation of TiO_2 Nanotube Arrays on Porous Titanium and Formation Mechanism

作　　者：李广忠[1,2] 高峰[1] 汤慧萍[2] 张文彦[2] 李纲[2] 康新婷[2] 赵培[2] 

机构地区：[1]西北工业大学,陕西西安710072 [2]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016

出　　处：《稀有金属材料与工程》2013年第S2期449-452,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50674076);KJXX28 of Shaanxi province

摘　　要：采用阳极氧化技术在2%HNO3+1%HF(体积分数)的水溶液中氧化多孔钛制备出高度有序的TiO2纳米管阵列。利用FESEM表征了多孔钛上的纳米结构。结果表明,纳米管的生长方向都垂直于多孔钛基体的钛颗粒表面。多孔钛片截面上不同区域获得的纳米结构的形貌相差很大。电压从7 V增加到20 V,纳米管的直径从22 nm增加到92 nm,即随着电压的增加,纳米管的直径线性增加。同时,通过观测纳米管不同生长阶段的表面形貌研究了其形成机理。The highly ordered TiO2 nanotube arrays were fabricated on porous titanium by anodic oxidation in 2% HNO3 with an addition of 1% HF(volume fraction).The morphology of nanostructure on porous titanium was characterized by scanning electron microscopy.The results indicate that the growing orientations of nanotubes are all perpendicular to the surface of titanium particles on porous titanium substrate.The morphology of nanostructure varies with the region of cross-sectional of porous titanium substrate.As the potential increases from 7 V to 20 V,the diameter of the nanotubes increases linearly from 22 nm to 92 nm.The mechanism of nanotube formation was studied according to surface morphology of nanotube at different growth stages.

关 键 词：多孔钛 阳极氧化 TIO2 纳米管阵列 

分 类 号：TB383.1[一般工业技术—材料科学与工程]