Electrospun mesoporous W6+-doped TiO2 thin films for efficient visible-light photocatalysis
Electrospun mesoporous W6+-doped TiO2 thin films for efficient visible-light photocatalysis
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DOI：
10.1016/j.matlet.2008.10.037
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发表时间：
2009-01-31
影响因子：
3
通讯作者：
Wang, Ce
中科院分区：
文献类型：
--
作者：
Yang, Yang;Wang, Haiying;Wang, Ce
以三嵌段共聚物为结构导向剂，采用静电纺丝和溶胶-凝胶化学方法制备了介孔W6+掺杂TiO2光催化剂，并用扫描电子显微镜、透射电子显微镜、X射线衍射仪和氮气吸附/脱附等温线对其进行了表征。以亚甲基蓝(MB)为探针考察了薄膜的光催化活性。在本研究中，W6+的最佳掺杂量为3%，可以有效地抑制光生电子和空穴的复合。同时，在纳米尺度上制备具有介孔结构的光催化剂，可以产生更多的活性中心来吸附和氧化污染物。(C)2008爱思唯尔B.V.保留所有权利。
Mesoporous W6+-doped TiO2 thin films photocatalysts were prepared via electrospinning and sol-gel chemistry, employing a triblock copolymer as structure-directing agent, and were characterized by SEM, TEM, XRD as well as N-2 adsoption/desorption isotherm. The photocatalytic activity of the films was investigated by employing the methylene blue (MB) as probe. In this study, 3% was the most suitable content of W6+ in TiO2, at which the recombination of photoinduced electrons and holes could be effectively inhibited. In the mean time, making the photocatalysts at nanoscale and with mesopores in the films could produce more reactive sites to adsorbe and oxidize pollutants. (C) 2008 Elsevier B.V. All rights reserved.