Preparation and spectroscopic characterization of visible light sensitized N doped TiO2 (rutile)
Preparation and spectroscopic characterization of visible light sensitized N doped TiO2 (rutile)
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DOI：
10.1016/j.jssc.2008.10.012
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发表时间：
2009
影响因子：
3.3
通讯作者：
S. Livraghi;A. Czoska;M. Paganini;E. Giamello
中科院分区：
文献类型：
--
作者：
S. Livraghi;A. Czoska;M. Paganini;E. Giamello
氮掺杂tio2是可见光光催化降解环境污染物最有前途的材料之一。然而，目前对锐钛矿多晶型的研究较多，而对金红石的研究资料较少。本文报道了溶胶-凝胶法制备N掺杂的多晶金红石tio2的实验表征。氮掺杂不影响价带到导带的分离，但会产生带隙内的局域态，导致可见光吸收的增加。带隙状态对应于含氮缺陷，与最近报道的氮掺杂锐钛矿相似但不一致。
Nitrogen doped TiO2represents one of the most promising material for photocatalitic degradation of environmental pollutants with visible light. However, at present, a great deal of activity is devoted to the anatase polymorph while few data about rutile are available. In the present paper we report an experimental characterization of N doped polycrystalline rutile TiO2prepared via sol–gel synthesis. Nitrogen doping does not affect the valence band to conduction band separation but, generates intra band gap localized states which are responsible of the on set of visible light absorption. The intra band gap states correspond to a nitrogen containing defect similar but not coincident with that recently reported for N doped anatase.