Visible-light-driven photocatalysis on fluorine-doped TIO2 powders by the creation of surface oxygen vacancies
Visible-light-driven photocatalysis on fluorine-doped TIO2 powders by the creation of surface oxygen vacancies
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DOI：
10.1016/j.cplett.2004.11.126
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发表时间：
2005-01-11
影响因子：
2.8
通讯作者：
Ohashi, N
中科院分区：
文献类型：
--
作者：
Li, D;Haneda, H;Ohashi, N
以H2TiF6水溶液为原料，采用喷雾热解法制备了f掺杂TiO2 （FT）粉体。这些FT粉末对乙醛和三氯乙烯的分解表现出非常高的可见光催化活性。虽然它们的紫外可见光谱表明f掺杂对大块TiO2的光学吸收性能影响较小。然而。光致发光（PL）光谱显示，F掺杂形成了两种氧空位（F中心和F+中心）。FT粉末Vis光催化活性的出现归因于这些氧空位的产生。(C) 2004 Elsevier B.V.版权所有
F-doped TiO2 (FT) powders were prepared by spray pyrolysis from an aqueous solution of H2TiF6. These FT powders demonstrated very high visible-light (Vis) photocatalytic activities for decompositions of both acetaldehyde and trichloroethylene. although their UV-Vis spectra indicated that F-doping had less effect on the optical absorption property of bulk TiO2.. However. photoluminescence (PL) spectra revealed that two kinds of oxygen vacancies (F and F+ centers) were formed by F-doping. The appearance of Vis photocatalytic activity for FT powders was ascribed to the creation of these oxygen vacancies. (C) 2004 Elsevier B.V. All rights reserved.