Fabrication and hydrogen sensing properties of interlinked ribbon-like TiO2 films.
Fabrication and hydrogen sensing properties of interlinked ribbon-like TiO2 films.
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DOI：
10.1166/jnn.2010.2799
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发表时间：
2010-11
影响因子：
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通讯作者：
F. Ren;Liang Huang;Yun-han Ling;Shih-Jia Shen;Jiayou Feng
中科院分区：
文献类型：
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作者：
F. Ren;Liang Huang;Yun-han Ling;Shih-Jia Shen;Jiayou Feng
采用微弧氧化法（MAO）对钛基材进行化学处理，制备了带状TiO2薄膜。化学处理包括两个步骤：首先对多孔TiO2膜表面进行碱处理，然后在酸性水溶液中进行离子交换。采用XRD、FE-SEM和TEM对样品的物相和微观结构进行了表征。结果表明，碱处理形成带状钛酸钠，酸处理后形貌保持不变。在500℃以上热处理后，样品表面的物相组成转变为TiO2 (MAOC-TiO2)，研究了低浓度下的氢感性能。结果表明，这种带状TiO2薄膜在低温下具有较高的传感性能。
Interlinked ribbon-like TiO2 films were prepared by micro-arc oxidation (MAO) process and subsequent chemical-treatment of titanium substrate. The chemical-treatment included two steps: firstly, alkali treatment was performed on the surface of the porous TiO2 films, and then the samples were ion-exchanged in acid aqueous solution. The phase and microstructure of the samples were characterized by XRD, FE-SEM and TEM. It is found that ribbon-like sodium titanate is formed by alkali treatment, and its morphology remains unchanged after acid-treatment. However, the phase compositions of the samples surface change into TiO2 (MAOC-TiO2) after heat-treatment above 500 degrees C. The hydrogen sensing properties at low concentrations were investigated. The result shows that such ribbon-like TiO2 films present high sensing properties at a low temperature.