| 光催化剂SO2- 4/TiO2和TiO2 的光谱行为比较 |
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| 引用本文： | 苏文悦,付贤智,魏可镁.光催化剂SO2- 4/TiO2和TiO2 的光谱行为比较[J].光谱学与光谱分析,2000,20(5):655-657. |
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| 作者姓名： | 苏文悦 付贤智 魏可镁 |
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| 作者单位： | 福州大学光催化研究所,350002,福州 |
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| 基金项目： | 中国科学院资助项目，国家产业化前期关键技术开发项目，福建省自然科学基金，教育部留学基金，29843003，98-03，B9820001，1999-363，，，， |
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| 摘 要： | 用ＩＲ、Ｒａｍａｎ和ＤＲＳ光谱研究了ＳＯ＾２－４／ＴｉＯ２光催化剂和ＴｉＯ２光催化剂的光谱行为差别。结果表明，ＴｉＯ２光催化剂的表面只有Ｌ酸中心，而ＳＯ＾２－４／ＴｉＯ２光催化剂表面既有Ｌ酸中心也有Ｂ酸中心。ＴｉＯ２的硫酸化有效地抑制了晶相转变和晶粒度的增加。与ＴｉＯ２相比，ＳＯ＾２－４／ＴｉＯ２光催化剂的锐钛矿相含量较多、晶粒较小、光谱吸收边蓝移，从而增大了光吸收阈值，增强了光生空穴和电子的氧化
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| 关 键 词： | 光催化剂 光谱行为 二氧化钛 硫酸修饰 |
Comparative Studies on the Spectral Behavior between SO2 -4/TiO2 and TiO2 Photocatalysts |
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| Wenyue SU,Xianzhi FU,Kemei WEI.Comparative Studies on the Spectral Behavior between SO2 -4/TiO2 and TiO2 Photocatalysts[J].Spectroscopy and Spectral Analysis,2000,20(5):655-657. |
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| Authors: | Wenyue SU Xianzhi FU Kemei WEI |
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| Institution: | Research Institute of Photocatalysis, Fuzhou University, 350002 Fuzhou. |
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| Abstract: | The differences of spectral behavior between SO4(2-)/TiO2 and TiO2 photocatalysts were studied by using IR, Raman as well as UV-Vis diffuse reflectance spectroscopy(DRS). The results showed that both L and B acid sites exist on SO4(2-)/TiO2 photocatalyst while only L acid sites on TiO2 photocatalyst. As compared with unmodified TiO2, the sulfated TiO2 (SO4(2-)/TiO2) exhibits higher resistance to crystal phase transition from anatase to rutile, higher resistance to growth of crystal grain. As the results of sulfation, SO4(2-)/TiO2 samples possess higher anatase content, smaller crystal grain, and the blue-shifted band edge of adsorption spectra, which increases the optical absorption threshold value and yield larger redox potential. |
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| Keywords: | SO- 2- 4/TiO 2 TiO 2 Photocat alyst Spectral behavior |
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