TiO_2纳米管阳极氧化法制备技术研究

Preparation technology of TiO_2 nanotubes by anodization

采用阳极氧化法制备了不同形貌的TiO_2纳米管阵列,研究了电解液浓度、阳极氧化时间和阳极氧化电压对TiO_2纳米管形貌和尺寸的影响,并分析了TiO_2纳米管的生长机理以及退火温度对TiO_2纳米管晶型转变的影响。结果表明,阳极氧化电压主要影响TiO_2纳米管的尺寸和形貌,电解液浓度和阳极氧化时间影响TiO_2纳米管的长度;随退火温度升高,TiO_2纳米管从非晶态向晶态转变,晶型由锐钛矿向金红石转变。

TiO2 nanotube arrays with different morphologies were prepared by anodization, and the effects of electrolyte components, anodization voltage and anodization time on the morphology and microstrueture of TiO2 nanotube arrays were investigated. The formation mechanism of TiO2 nanotubes and the effects of annealing temperature on the crystal structure transformation of TiO2 nanotube arrays were also discussed. The results show that, the anodization voltage mainly determines the size and morphology of the TiO2 nanotubes, and the electrolyte concentration and anodization time affects the length of the TiO2 nanotubes. When the annealing temperature increases, the TiO2 nanotubes changes from amorphous to crystalline with its crystal structure transformation from anatase to rutile.