Hou Qin, Yin Hong-Feng, Yuan Hu-Die, Tang Yun, Cai Yan-Zhi
College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China.
J Nanosci Nanotechnol. 2018 Mar 1;18(3):1983-1988. doi: 10.1166/jnn.2018.14233.
A TiO2 nanostructure was prepared on a Ti3SiC2 substrate with different water and NH4F concentrations in a fluoride-containing ethylene glycol electrolyte via an anodization process using the same constant-anodization potentials, anodization duration and temperature. The as-prepared samples were characterized by a field-emission scanning electron microscope equipped with an energy dispersive X-ray spectroscope, as well as by X-ray diffraction and X-ray photoelectron spectroscopy. The influence of the anodizing parameters and annealing temperature on the morphology of the nanostructure and the phase structure was studied. The results showed that the scattered TiO2 nanotubes and TiO2 nanoporous films were successfully fabricated in the glycol electrolyte containing (3.0 wt%) NH4F +(5.0 vol%) H2O. The as-prepared samples before calcination were amorphous and could transform to the anatase phase at temperatures higher than 500 °C. As the annealing temperature increased, the crystallization of the anatase phase was enhanced, and the rutile phase appeared at 600 °C. The as-prepared samples mainly consisted of oxides. Ti2O3 and SiO2 oxides were present in addition to TiO2.
通过阳极氧化工艺，在含氟乙二醇电解液中，使用相同的恒阳极氧化电位、阳极氧化持续时间和温度，在Ti3SiC2衬底上制备了具有不同水和NH4F浓度的TiO2纳米结构。通过配备能量色散X射线光谱仪的场发射扫描电子显微镜以及X射线衍射和X射线光电子能谱对所制备的样品进行了表征。研究了阳极氧化参数和退火温度对纳米结构形态和相结构的影响。结果表明，在含有（3.0 wt%）NH4F +（5.0 vol%）H2O的乙二醇电解液中成功制备了分散的TiO2纳米管和TiO2纳米多孔膜。煅烧前制备的样品为非晶态，在高于500°C的温度下可转变为锐钛矿相。随着退火温度的升高，锐钛矿相的结晶增强，在600°C时出现金红石相。所制备的样品主要由氧化物组成。除TiO2外，还存在Ti2O3和SiO2氧化物。
