Fabrication and characterization of copper doped TiO2 nanotube arrays by in situ electrochemical method as efficient visible-light photocatalyst
Fabrication and characterization of copper doped TiO2 nanotube arrays by in situ electrochemical method as efficient visible-light photocatalyst
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DOI：
10.1016/j.ceramint.2015.03.094
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发表时间：
2015-08-01
影响因子：
5.2
通讯作者：
Ghonchegi, Zohre
中科院分区：
文献类型：
--
作者：
Momeni, Moharnad Mohsen;Ghayeb, Yousef;Ghonchegi, Zohre
通过电化学氧化钛基底，在含有 NH4F 和不同浓度硝酸铜的水溶液中制备了高度有序的铜掺杂 TiO2 纳米管阵列 (CuTiO2NTs) 薄膜。所得纳米管通过 FE-SEM、XRD、XPS 和 EDX 进行表征。 CuTiO2NTs 的管直径为 40-90 nm，壁厚为 20-30 nm。漫反射光谱显示相对于纯 TiO2 纳米管 (TiO2NT) 向更长波长的转变。通过去除亚甲基蓝（MB）染料和产生氢气来评估 CuTiO2NTs 电极的可见光光催化活性。结果表明，CuTiO2NTs 样品表现出比 TiO2NTs 更好的光催化活性。这项工作展示了一种可行且简单的阳极氧化方法，可以制造有效、可重复且廉价的可见光驱动光催化剂，用于析氢和环境应用。 (C) 2015 Elsevier Ltd 和 Techna Group S.r.l.版权所有。
Highly ordered copper doped TiO2 nanotube arrays (CuTiO2NTs) thin-film were prepared in an aqueous solution containing NH4F and different concentrations of copper nitrate via the electrochemical oxidation of titanium substrates. The resulting nanotubes were characterized by FE-SEM, XRD, XPS and EDX. The CuTiO2NTs showed a tube diameter of 40-90 nm and wall thickness of 20-30 nm. Diffuse reflectance spectra showed a shift toward longer wavelengths relative to pure TiO2 nanotubes (TiO2NTs). The visible light photo-catalytic activity of the CuTiO2NTs electrodes was evaluated by the removal of methylene blue (MB) dye and the production of hydrogen. The results showed that CuTiO2NTs samples exhibited better photo-catalytic activity than the TiO2NTs. This work demonstrated a feasible and simple anodization method to fabricate an effective, reproducible, and inexpensive visible-light-driven photo-catalyst for hydrogen evolution and environmental applications. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.