| 光促甲烷和水合成甲醇和氢催化剂的研究 |
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| 引用本文： | 桑丽霞,钟顺和.光促甲烷和水合成甲醇和氢催化剂的研究[J].燃料化学学报,2006,34(3):332-336. |
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| 作者姓名： | 桑丽霞 钟顺和 |
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| 作者单位： | 1. College of Chemical Engineering and Technology, Tianjin University, Tianjin 300072; 2. Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Education Commission, Beijing University of Technology, Beijing 100022 |
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| 摘 要： | 用表面改性法制备TiO2/SiO2，以等体积浸渍法制备负载型复合半导体催化剂(MoO3,ZnO)-TiO2/SiO2，通过XRD、BET、TPR、IR、UV-Vis DRS和TPD等技术对材料的表面形态结构、吸光特性、化学吸附性能及光催化甲烷和水的反应性能进行了表征和分析。结果表明，MoO3-TiO2/SiO2和ZnO-TiO2/SiO2的表面物种均具有显著的量子尺寸效应，在表面分别形成Mo—O—Ti和Zn—O—Ti复合结构；MoO3和TiO2在载体表面的复合可提高对光能的利用率并可增强对甲烷的化学吸附性能， 结果使得MoO3-TiO2/SiO2的光催化反应性能明显优于ZnO-TiO2/SiO2；在固定床环隙反应器中，150℃MoO3-TiO2/SiO2光催化气相甲烷和水合成了目的产物甲醇和氢，甲醇的选择性达到87.3％。
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| 关 键 词： | TiO2/SiO2 MoO3 ZnO 甲烷 甲醇 光催化 |
| 文章编号： | 0253-2409（2006）03-0332-05 |
| 收稿时间： | 2005-08-07 |
| 修稿时间： | 2006-02-04 |
Study on photocatalysts for synthesis of methanol and hydrogen from methane with water |
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| SANG Li-xia,ZHONG Shun-he.Study on photocatalysts for synthesis of methanol and hydrogen from methane with water[J].Journal of Fuel Chemistry and Technology,2006,34(3):332-336. |
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| Authors: | SANG Li-xia ZHONG Shun-he |
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| Institution: | 1. College of Chemical Engineering and Technology, Tianfin University, Tianfin 300072 2. Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beifing Education Commission, Beifing University of Technology, Beijing 100022 |
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| Abstract: | TiO2/SiO2 were prepared by the chemical modification reaction on SiO2, then the supported coupled semiconductors (MoO3, ZnO)-TiO2/SiO2 were prepared by isovolumic impregnating TiO2/SiO2. The surface structure, chemical adsorption capabilities, photon absorption properties and photocatalytic behaviors of MoO3-TiO2/SiO2 and ZnO-TiO2/SiO2 were systematically investigated by the techniques of X-ray differaction (XRD), BET, temperature programmed reduction (TPR), UV-Vis DRS, IR and temperature programmed desorpsion (TPD). The surface species of MoO3-TiO2/SiO2 and ZnO-TiO2/SiO2, comprising Mo—O—Ti and Zn—O—Ti bonds respectively, have the quantum size effects due to the supports interaction. The supported coupled semiconductors MoO3-TiO2/SiO2 exhibits higher photocatalytic activity than ZnO-TiO2/SiO2, because chemisorption property of CH4 and utilization of the photo energy enhanced effectively when MoO3 was incorporated on TiO2/SiO2. CH3OH and H2 are produced by the gas-phase photocatalytic reaction of CH4 and H2O over MoO3-TiO2/SiO2 catalyst at 150℃ in a fixed-bed annular photoreactor, and the CH3OH selectivity is 87.3%. |
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| Keywords: | TiO2/SiO2 MoO3 ZnO |
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