Preparation and characterization of Zr doped TiO2 nanotube arrays on the titanium sheet and their enhanced photocatalytic activity
Preparation and characterization of Zr doped TiO2 nanotube arrays on the titanium sheet and their enhanced photocatalytic activity
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DOI：
10.1016/j.jssc.2009.09.016
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发表时间：
2009-12-01
影响因子：
3.3
通讯作者：
Zhou, Qingxiang
中科院分区：
文献类型：
--
作者：
Liu, Haijin;Liu, Guoguang;Zhou, Qingxiang
本文介绍了一种用电化学方法制备掺锆二氧化钛纳米管阵列的新方法。采用钛阳极和铂阴极阳极氧化法制备了二氧化钛纳米管阵列。然后，分别以所形成的二氧化钛纳米管阵列和铂为阴极和阳极，在0.1M的硝酸锆电解液中，通过不同的电压和焙烧工艺制备了纳米管阵列。用场发射扫描电子显微镜(FESEM)、X射线衍射仪(XRD)、X射线光电子能谱(XPS)和紫外可见漫反射光谱(DRS)对纳米管阵列进行了表征。以罗丹明B为模型污染物考察了这些纳米管的光催化活性，结果表明，在紫外光照射下，掺锆二氧化钛纳米管的光催化效率远高于二氧化钛纳米管。掺杂电压为7V、焙烧温度为600℃的纳米管阵列具有最好的光催化效率，最佳掺杂比为0.047(Zr/Ti)。Ti02-7V-600可重复使用20次以上，并保持了良好的光催化活性。(C)2009 Elsevier Inc.保留所有权利。
This paper described a new method for the preparation of Zr doped TiO2 nanotube arrays by electrochemical method. TiO2 nanotube arrays were prepared by anodization with titanium anode and platinum cathode. Afterwards, the formed TiO2 nanotube arrays and Pt were used as cathode and anode, respectively, for preparation of Zr/TiO2 nanotube arrays in the electrolyte of 0.1 M Zr(NO3)(4) with different voltage and post-calcination process. The nanotube arrays were characterized by field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectra (XPS) and UV-Vis diffusion reflection spectra (DRS). The photocatalytic activities of these nanotubes were investigated with Rhodamine B as the model pollutant and the results demonstrated that the photocatalytic efficiency of Zr doped TiO2 nanotubes was much better than that of TiO2 nanotubes under UV irradiation. Zr/TiO2 nanotube arrays doped at 7 V and calcined at 600 degrees C (denoted as TiO2-7 V-600) achieved the best photocatalytic efficiency and the most optimal doping ratio was 0.047 (Zr/Ti). TiO2-7 V-600 could be reused for more than 20 times and maintained good photocatalytic activities. (C) 2009 Elsevier Inc. All rights reserved.