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2009 , Vol. 24 >Issue 5: 909 - 914

DOI: https://doi.org/10.3724/SP.J.1077.2009.00909

研究论文

氮硫掺杂介孔TiO2薄膜结构及其光催化性能

  • 李 辉 ,
  • 王金淑 ,
  • 李洪义 ,
  • YIN Shu ,
  • SATO Tsugio
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  • （1.北京工业大学 材料科学与工程学院, 北京 100124; 2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 9808577, Japan）

收稿日期: 2008-12-29

  修回日期: 2009-02-16

  网络出版日期: 2009-09-20

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Microstructure of Nitrogen and Sulfur Co-doped Mesoporous TiO2 Film and its Photocatalytic Activity

  • LI Hui ,
  • WANG Jin-Shu ,
  • LI Hong-Yi ,
  • YIN Shu ,
  • SATO Tsugio
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  • (1. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China; 2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan)

Received date: 2008-12-29

  Revised date: 2009-02-16

  Online published: 2009-09-20

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摘要

分别以Ti(OBun)4和Pluronic F127为无机前驱体和模板剂, 以硫脲为添加剂, 采用sol-gel法结合蒸发致自组装法（EISA）制备了锐钛矿结构的介孔TiO2薄膜材料.采用SEM、 XPS、N2 吸附-脱吸、XRD和 UV-Vis光谱对其进行了表征. 研究发现, 向前驱体溶液添加硫脲一方面改变了TiO2的介孔结构, 另一方面对介孔TiO2进行了N、S共掺杂. 当溶液中硫脲与Ti(OBun)4的摩尔比为2.5%时, 介孔TiO2的孔径由未掺杂的7.0nm增至12.4nm, 光催化降解甲基橙实验表明其在紫外光区具有最优的光催化活性; 当溶液中硫脲与Ti(OBun)4的摩尔比为5%时, 其吸收边由380nm扩展至520nm, 光催化降解罗丹明B实验表明其在可见光下显示出最优的光催化活性.

关键词： 介孔TiO2; 氮硫共掺杂; 可见光吸收; 光催化

本文引用格式

李 辉 , 王金淑 , 李洪义 , YIN Shu , SATO Tsugio . 氮硫掺杂介孔TiO2薄膜结构及其光催化性能[J]. 无机材料学报, 2009 , 24(5) : 909 -914 . DOI: 10.3724/SP.J.1077.2009.00909

Abstract

Using Ti(OBun)4 as the inorganic precursor, Pluronic F127 as the templating agent, and thiourea as the additive, mesoporous anatase TiO2 thin films were prepared through sol-gel method coupled with evaporationinduced self-assembly (EISA) process. Scanning electron microscope, X-ray photoelectron spectra, N2 adsorption-desorption, X-ray diffraction, and UV-Vis spectra were used to characterize the as-synthesized mesoporous TiO2 materials. It is found that, apart from doping N, S elements into the TiO2 lattice, the mesostructure of the TiO2 thin films is changed by adding thiourea into the reactive solution. When the mole ratio of thiourea to Ti(OBun)4 is 2.5%, the pore size of the synthesized mesostructured TiO2 reaches 12.4nm, and the mesoporous TiO2 sample shows the best UV photocatalytic activity in the degradation of the methyl organge (MO). When the mole ratio of thiourea to Ti(OBun)4 is 5%, the absorption edge of the as-synthesized sample can be extended from 380nm to 520nm, and the sample exhibits the best visible photo catalytic activity in decomposing the Rhodamine B (RhB).

Key words： mesoporous TiO2; N,S co-doping; visible light absorption; photocatalysis

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