| 不同载体表面负载TiO2薄膜的离子掺杂研究 |
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| 引用本文： | 陈建华,赵翠华,龚竹青,王晓林,刘自力. 不同载体表面负载TiO2薄膜的离子掺杂研究[J]. 工业催化, 2005, 13(12): 52-57 |
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| 作者姓名： | 陈建华 赵翠华 龚竹青 王晓林 刘自力 |
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| 作者单位： | 1.广西大学资源与环境学院，广西 南宁530004；2.广西大学化学化工学院，广西 南宁530004；;3.中南大学冶金科学与工程学院，湖南 长沙410083；4.广州大学化学与轻化工学院，广东 广州510405 |
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| 基金项目： | 国家自然科学基金项目（20466001）;广西科技厅重点项目（2004ZD01） |
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| 摘 要： | TiO2薄膜是解决TiO2回收的有效方法，缺点是TiO2活性低，寻找合适的载体以及提高TiO2薄膜的光催化活性,是TiO2负载薄膜技术需要解决的核心问题。研究了13种离子对负载在釉面瓷砖、玻璃、陶瓷、钛片、铝片和不锈钢片6种载体上TiO2薄膜的掺杂，并从界面材料结构、双电层结构等方面讨论了离子掺杂与载体对TiO2薄膜光催化活性的影响。结果表明，TiO2薄膜的离子掺杂效果不仅和离子掺杂浓度、种类有关，而且还与载体类型有关。TiO2薄膜和非金属载体主要形成复合半导体结构，改善掺杂离子对载流子的捕获能力。金属载体与TiO2薄膜之间主要形成肖特基势垒，有利于电子与空穴的分离。载体与TiO2薄膜之间形成的界面双电层结构能改变离子捕获中心与TiO2半导体费米能级间的相对位置，从而提高或降低离子对载流子的捕获能力。
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| 关 键 词： | 离子掺杂 载体类型 TiO2薄膜 光催化剂
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| 文章编号： | 1008-1143(2005)12-0052-06 |
| 收稿时间： | 2005-06-06 |
| 修稿时间： | 2005-06-06 |
Researches in ion doping of TiO2 thin film on different substrates |
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| CHEN Jian-hua,ZHAO Cui-hua,GONG Zhu-qing,WANG Xiao-lin,LIU Zi-li. Researches in ion doping of TiO2 thin film on different substrates[J]. Industrial Catalysis, 2005, 13(12): 52-57 |
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| Authors: | CHEN Jian-hua ZHAO Cui-hua GONG Zhu-qing WANG Xiao-lin LIU Zi-li |
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| Affiliation: | 1. College of Resources and Environment, Guangxi University, Nanning 530004, China; 2．College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; 3.School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China; 4.College of Chemistry and Light Chemical Industry, Guangzhou University, Guangzhou 510405, China |
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| Abstract: | The main disadvantage with TiO_2 thin film,an effective way for recovery of TiO_2 in the photocatalyst,is its low activity.The key to TiO_2 thin film catalysis is to find suitable substrates to enhance photocatalytic activity of TiO_2 thin film.Doping of 13 metal ions into TiO_2 thin film carried on 6 substrates(ceramic tile,glass,ceramic,titanium slice,aluminum slice and stainless steel slice) were studied,and influences of the doping on photocatalytic activity of TiO_2 thin film were discussed from interface structure and double electronic layer between substrate and TiO_2 thin film.The results showed that effects of ion doping were dependent upon not only the ion dopant and its concentration,but also the types of substrates.Composite semiconductor structure formed between TiO_2 thin film and nonmetal substrate,which enhanced the carrier trap capability of metal ion dopants.Schottky barrier formed between metal substrate and TiO_2 thin film favored separation of photogenerated-electrons and photogeneratedvacancies.Double electronic layer structure between substrates and TiO_2 thin film changed the relative position between trap position of metal ions and Femi level of TiO_2 semiconductor,accordingly lowered or enhanced the trapping capability of metal ion to carriers. |
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| Keywords: | metal ion doping substrate TiO2 thin film photocatalyst |
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