| 钠离子对TiO_2薄膜结构及其光催化活性的影响 |
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| 引用本文： | 张志宏,赵莲花,任璐萍.钠离子对TiO_2薄膜结构及其光催化活性的影响[J].材料科学与工程学报,2010,28(1):90-96. |
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| 作者姓名： | 张志宏 赵莲花 任璐萍 |
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| 作者单位： | 延边大学理学院化学系,吉林,延吉,133002;延边大学理学院化学系,吉林,延吉,133002;延边大学理学院化学系,吉林,延吉,133002 |
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| 基金项目： | 国家自然科学基金资助项目(20563004) |
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| 摘 要： | 采用溶胶-凝胶浸渍提拉法在不同玻璃基板上制备TiO2薄膜,并通过降解浸渍在薄膜表面的甲基蓝来评价其光催化活性。利用X射线衍射(XRD)、X射线光电子能谱(XPS)和紫外-可见(UV-Vis)吸收光谱等研究了晶型、表面元素分析和光吸收性能。并采用平行电极法测定TiO2薄膜的光电流,研究了薄膜表面载流子的复合情况。结果表明,薄膜的催化性能主要与基板热扩散到薄膜中的Na+和晶相相关。Na+抑制锐钛矿相TiO2的形成,并且在一定条件下促进由锐钛矿向金红石相的转变。Na+的扩散对TiO2晶粒尺寸影响不大。重要的是,扩散至薄膜的Na+不仅影响TiO2薄膜的晶相转变,而且成为光生电子与空穴的复合中心,同时影响其光催化活性。
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| 关 键 词： | TiO_2薄膜 光电流 离子扩散 光催化 |
Effects of Sodium Ions on Structure and Photocatalytic Activity of TiO_2 thin Films |
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| ZHANG Zhi-hong,ZHAO Lian-hua,REN Lu-ping.Effects of Sodium Ions on Structure and Photocatalytic Activity of TiO_2 thin Films[J].Journal of Materials Science and Engineering,2010,28(1):90-96. |
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| Authors: | ZHANG Zhi-hong ZHAO Lian-hua REN Lu-ping |
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| Affiliation: | Department of Chemistry;College of Science;Yanbian University;Yanji 133002;China |
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| Abstract: | TiO_2 thin films were prepared by sol-gel dip-coated method on various kinds of glass substrates.Photocatalytic activities were evaluated by photocatalytic degradation of methylene blue adsorbed on different TiO_2 thin films.Crystalline phase,surface elemental analysis and optical absorption property were studied by XRD,XPS and UV-Vis technologies,respectively.The recombination situation of surface carriers was also studied by determinating the parallel electrode photocurrent of TiO_2 films.The results show... |
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| Keywords: | TiO_2 thin films photocurrent diffusion of ions photocatalysis |
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