Preparation and photoelectrocatalytic activity of ZnO nanorods embedded in highly ordered TiO(2) nanotube arrays electrode for azo dye degradation.
Preparation and photoelectrocatalytic activity of ZnO nanorods embedded in highly ordered TiO(2) nanotube arrays electrode for azo dye degradation.
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DOI：
10.1016/j.jhazmat.2008.01.118
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发表时间：
2008-10
影响因子：
13.6
通讯作者：
Zhonghai Zhang;Yuan Yuan-Yuan;Linhong Liang;Yuxiao Cheng;G. Shi;L. Jin
中科院分区：
文献类型：
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作者：
Zhonghai Zhang;Yuan Yuan-Yuan;Linhong Liang;Yuxiao Cheng;G. Shi;L. Jin
本文采用阳极氧化法在HF溶液中电合成TiO{sub 2}纳米管阵列（TiO{sub 2} NTs），然后在TiO{sub 2}纳米管阵列中阴极电沉积ZnO，制备了高度有序的TiO {sub 2}纳米管阵列中嵌入ZnO纳米棒（ZnO/TiO{sub 2} NR/Ts）电极。采用场发射扫描电子显微镜（FE-SEM）、X射线能谱（EDX）、X射线衍射（XRD）和紫外-可见光谱（UV-vis）对ZnO/TiO{sub 2} NR/Ts电极的形貌和结构进行了表征。结果表明，ZnO/TiO{sub 2} NR/Ts电极具有线性扫描的光伏安响应，与裸TiO{sub 2} NTs电极相比，ZnO/TiO{sub 2} NR/Ts电极的光电流显著增强。研究了ZnO/TiO 2 NR/Ts电极对水溶液中橙子（MO）的光催化和光电催化降解活性。
In this article, the ZnO nanorods embedded in highly ordered TiO{sub 2} nanotube arrays (ZnO/TiO{sub 2} NR/Ts) electrodes were fabricated through two steps: (1) electrosynthesis of TiO{sub 2} nanotube arrays (TiO{sub 2} NTs) in HF solution by anodization method; (2) followed by cathodic electrodeposition of ZnO embedded in the TiO{sub 2} nanotube arrays. The morphological characteristics and structures of ZnO/TiO{sub 2} NR/Ts electrodes were examined by field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) spectroscopy, X-ray diffraction (XRD) analysis, and UV-vis spectra. The linear-sweep photovoltammetry response on the ZnO/TiO{sub 2} NR/Ts electrode was presented and the photocurrent was dramatically enhanced on the ZnO/TiO{sub 2} NR/Ts electrode, comparing with that on bare TiO{sub 2} NTs electrode. The photocatalytic and photoelectrocatalytic activity of ZnO/TiO{sub 2} NR/Ts electrode was evaluated in degradation of methyl orange (MO) in aqueous solution.