Synthesis and Characterization of Hierarchical Structured TiO2 Nanotubes and Their Photocatalytic Performance on Methyl Orange
Synthesis and Characterization of Hierarchical Structured TiO2 Nanotubes and Their Photocatalytic Performance on Methyl Orange
复制标题
多级结构TiO2纳米管的合成、表征及其对甲基橙的光催化性能
DOI：
10.1155/2015/201650
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发表时间：
2015
影响因子：
--
通讯作者：
Zeng Min
中科院分区：
文献类型：
--
作者：
Liu Kai;Lin Shiwei;Liao Jianjun;Pan Nengqian;Zeng Min
采用机械球磨的方法对钛箔进行电化学阳极氧化生长的高度有序的TiO 2纳米管阵列进行球磨，制备了具有分级结构的TiO 2纳米管。采用扫描电子显微镜、透射电子显微镜、X射线衍射、比表面积分析、紫外-可见吸收光谱、光电流测量、光致发光光谱、电化学阻抗谱和光催化降解试验对复合材料进行表征。表面积随着研磨时间的延长而增加。球磨5 h后，TiO 2分级纳米管呈现玉米状，光电化学活性比P25增强。上级光催化活性的建议是由于纳米粒子的高表面积和快速的电子转移以及收集的纳米管的分级结构的综合优势。TiO 2纳米管的分级结构可以灵活地应用于太阳能电池、传感器和其他光电化学器件。
Hierarchical structured TiO2nanotubes were prepared by mechanical ball milling of highly ordered TiO2nanotube arrays grown by electrochemical anodization of titanium foil. Scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, specific surface area analysis, UV‐visible absorption spectroscopy, photocurrent measurement, photoluminescence spectra, electrochemical impedance spectra, and photocatalytic degradation test were applied to characterize the nanocomposites. Surface area increased as the milling time extended. After 5 h ball milling, TiO2hierarchical nanotubes exhibited a corn‐like shape and exhibited enhanced photoelectrochemical activity in comparison to commercial P25. The superior photocatalytic activity is suggested to be due to the combined advantages of high surface area of nanoparticles and rapid electron transfer as well as collection of the nanotubes in the hierarchical structure. The hierarchical structured TiO2nanotubes could be applied into flexible applications on solar cells, sensors, and other photoelectrochemical devices.