TiO2纳米管的制备及其光电性能研究

摘要

Titanium dioxide (TiO2) nanotube arrays have higher specific surface area and higher adsorption capacity. TiO2 nanotube arrays were fabricated by the anodic oxidation method. By changing the anodic oxidation voltage,anodic oxidation time and concentration of NH4F,TiO2 nanotube arrays were obtained with different morphologies and the photovoltaic performance of these samples was studied. It was found that when the sample was prepared at voltage of 50 V,NH4F concentration of 0.25wt% and reaction time of 4 h,maximum photocurrent was about 46 μA/cm2.%二氧化钛(TiO2)纳米管阵列具有大的比表面积和高的吸附能力,表现出优异的光催化性能和光电转化效率.本文采用阳极氧化法制备TiO2纳米管阵列.通过改变阳极氧化的时间、电压以及NH4F的浓度,得到了不同形貌的TiO2纳米管阵列,并对所得到的样品进行了一系列的光电流测试,当外加电压50 V,NH4F浓度为0.25wt%,反应时间为4 h时得到的样品的光电流最大,约为46 μA/cm2.