| 原位红外光谱法研究Gd3+掺杂TiO2光催化降解乙烯性能 |
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| 引用本文： | 黄雅丽,李旦振,付贤智,王绪绪.原位红外光谱法研究Gd3+掺杂TiO2光催化降解乙烯性能[J].无机化学学报,2004,20(7):868-872. |
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| 作者姓名： | 黄雅丽 李旦振 付贤智 王绪绪 |
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| 作者单位： | 福州大学光催化研究所,福州,350002 |
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| 基金项目： | 国家自然科学基金重点项目(No.20133010)，国家自然科学基金项目(No.20273014)，教育部科技重点项目(No.03061,01059)，福建省自然科学基金重大项目(No.2003F004,2002H008)，福建省教育厅重点项目(No.JA02138,JA01002)资助。 |
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| 摘 要： | 随着环境污染的日益严重,寻求环境友好、节能、高效的污染治理技术已成为各国科学研究者致力的目标。以TiO2半导体为主的多相光催化氧化技术因与传统污染处理技术相比具有许多优点而倍受青睐,但是,目前以TiO2为基础的光催化技术还存在量子效率低、太阳能利用率低等技术难题1,2
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| 关 键 词： | TiO2 掺杂 原位红外光谱 光催化氧化 乙烯 |
| 修稿时间： | 2004年2月5日 |
In Situ FTIR Study On Photocatalytic Degradation of Ethylene Over Gd3+-Doped TiO2 |
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| HUANG Ya-Li,LI Dan-Zhen,FU Xian-Zhi and WANG Xu-Xu.In Situ FTIR Study On Photocatalytic Degradation of Ethylene Over Gd3+-Doped TiO2[J].Chinese Journal of Inorganic Chemistry,2004,20(7):868-872. |
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| Authors: | HUANG Ya-Li LI Dan-Zhen FU Xian-Zhi and WANG Xu-Xu |
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| Institution: | Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002,Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002,Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002 and Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002 |
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| Abstract: | The Gd3+-doped TiO2 photocatalyst was prepared by the sol-gel and impregnation method. The effect of Gd3+ doping on crystalline size, BET surface area and photocatalytic activity was studied by XRD, FTIR, BET, UV-Vis diffuse reflection spectroscopy, surface photovoltage spectroscopy (SPS). The activities of TiO2 and Gd3+-doped TiO2 catalysts for photocatalytic degradation of ethylene were studied by means of in situ FTIR. The photocatalytic reaction rate constant of ethylene becomes larger through Gd3+ doping. The rate constant of TiO2 was k1=8.51×10-4 min-1, while that of Gd/TiO2 was k2=1.85×10-3min-1. At the same time, the yield of CO2 increased with Gd3+ doping. The enhancement in photocatalytic activity is probably due to the increase of light absorption, higher content of anatase, smaller crystal line size and higher specific surface area. In addition, the higher photocatalytic activity of Gd3+-doped TiO2 might be attributed to the effective separation of photo-generated electron-hole pairs. |
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| Keywords: | TiO2 doping in situ FTIR photocatalytic oxidation ethylene |
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