Formation and Photocatalytic Application of ZnO Nanotubes Using Aqueous Solution
Formation and Photocatalytic Application of ZnO Nanotubes Using Aqueous Solution
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DOI：
10.1021/la902866a
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发表时间：
2010-02-16
期刊：
影响因子：
3.9
通讯作者：
Kato, Kazumi
中科院分区：
文献类型：
--
作者：
Chu, Dewei;Masuda, Yoshitake;Kato, Kazumi
在化学浴沉积法制备的ZnO纳米管阵列的基础上，通过在水溶液中刻蚀ZnO红阵列的方法制备了垂直排列的ZnO纳米管。考察了ZnO纳米管的形貌、结构、光致发光和光催化性能随化学浴溶液pH值的变化。产物的形貌对pH值和化学浴温度敏感。在低pH值（5.82）下合成的纳米管表现出较强的紫外发射和较弱的，与缺陷相关的可见光发射。最高的光催化效率也观察到在pH = 5.82。并对光催化效率差异的可能机理进行了探讨。
Vertically aligned ZnO nanotubes were prepared by etching ZnO red arrays in aqueous solution, which were previously developed by chemical bath deposition method. The morphological, structural, photoluminescence, as well as photocatalytic properties of the ZnO nanotubes were examined with respect to the pH values of chemical bath solution. The morphology of the products was found to be sensitive to the pH values and chemical bath temperatures. The nanotubes synthesized at a low pH value (5.82) exhibited a strong UV emission and a weak, defect-related visible emission. The highest photocatalytic efficiency was also observed at pH = 5.82. The possible mechanism for the difference of photocatalytic efficiency was discussed.