| 尹京花,赵莲花,武伦鹏,张海明.掺铁TiO2纳米微粒的制备及光催化活性[J].分子催化,2006,(6):569-573 |
| 掺铁TiO2纳米微粒的制备及光催化活性 |
| Preparation and Photocatalytic Reactivity of Iron-doped TiO2 Nanoparticles |
| 投稿时间：2006-01-16 修订日期：2006-05-07 |
| DOI： |
| 中文关键词: 溶胶凝胶法,二氧化钛,铁掺杂,光电导,光催化 |
| 英文关键词:Sol-gel method,Titaniumdioxide,Doped Iron,Photocurrent,Photocatalysis |
| 基金项目:吉林省教育厅科研规划课题支助项目(2005104)，国家自然科学基金资助项目(205630047) |
| 尹京花 赵莲花 武伦鹏 张海明 |
| 延边大学长白山天然资源与功能分子省部共建教育部重点实验室 吉林延吉133002 |
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| 中文摘要: |
| 采用溶胶-凝胶法制备了不同掺铁量的TiO2光催化剂,运用TG-DTA,XRD,SEM,DRS和测定光电导等方法对催化剂进行了表征.以高压汞灯为光源,罗丹明B为目标降解物,对其光催化活性进行了研究.实验结果表明,掺铁的TiO2比纯TiO2具有更好的催化活性.其原因:掺杂的铁作为受主捕获电子,使TiO2的n型半导体降低了光电导,控制了空穴和电子复合;同时掺杂的Fe3 可能形成杂质能级,由于掺杂能级处于禁带之中,使较长波长的光子也能被吸收,从而扩展吸收光谱的范围,增强了对可见光的吸收. |
| 英文摘要: |
| Fe~(3 )-doped TiO_2 nanoparticles with different Fe~(3 ) content were prepared by sol-gel method.TG-DTA,XRD,SEM and DRS techniques were used to characterize the Fe~(3 )-doped TiO_2.The photoelectrochemical properties were studied by measuring photocurrent.The photocatalytic activity was tested with rhodamine B as the objective decomposition substance.The results show that the 0.05% Fe~(3 )-doped TiO_2 has a higher photocatalytic activity than pure TiO_(2.) The role of Fe~(3 ) doping could reduce recombination of photo-generated carriers in the TiO_2 as an electron acceptor_(.) And could be due to the decreases in the band gap of the TiO_2,and the increase in the ability of the TiO_2 to absorb photon energy in visible spectrum. |
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