| TiO2/SiO2复合粉体的制备及催化性能的研究 |
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| 引用本文： | 封娜,郑治祥,徐光青,汤文明,吴玉程.TiO2/SiO2复合粉体的制备及催化性能的研究[J].合肥工业大学学报(自然科学版),2006,29(6):651-654. |
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| 作者姓名： | 封娜 郑治祥 徐光青 汤文明 吴玉程 |
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| 作者单位： | 合肥工业大学,材料科学与工程学院,安徽,合肥,230009;合肥工业大学,材料科学与工程学院,安徽,合肥,230009;合肥工业大学,材料科学与工程学院,安徽,合肥,230009;合肥工业大学,材料科学与工程学院,安徽,合肥,230009;合肥工业大学,材料科学与工程学院,安徽,合肥,230009 |
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| 摘 要： | 文章采用XRD和FT-IR等方法对用Sol-Gel法制备的TiO2/SiO2复合粉体进行了表征,考察了原料组成和焙烧温度对复合物相变温度和晶型转变的影响,以及掺杂对甲基橙光催化降解的影响。研究表明,TiO2微粒以锐钛矿相高度分散在SiO2基质中,并与其形成了Ti-O-Si桥氧结构,提高了TiO2的表面积和表面缺陷,有利于有机物的吸附及半导体光生电子-空穴的分离,从而提高了半导体的光催化活性。
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| 关 键 词： | 复合微粒 TiO2/SiO2 甲基橙 光降解 |
| 文章编号： | 1003-5060(2006)06-0651-04 |
| 修稿时间： | 2005年7月8日 |
Study on the preparation of TiO2/SiO2 composite powder and its photocatalytic activity |
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| FENG Na,ZHENG Zhi-xiang,XU Guang-qing,TANG Wen-ming,WU Yu-cheng.Study on the preparation of TiO2/SiO2 composite powder and its photocatalytic activity[J].Journal of Hefei University of Technology(Natural Science),2006,29(6):651-654. |
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| Authors: | FENG Na ZHENG Zhi-xiang XU Guang-qing TANG Wen-ming WU Yu-cheng |
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| Abstract: | The TiO_2/SiO_2 composite powder made by the sol-gel technique was analyzed by means of XRD and FT-IR.The effects of composition and heat treatment on the transformation temperature of the anatase phase into the rutile phase as well as the effect of doping of SiO_2 on the photocatalytic degradation of methyl orange were examined.The investigation indicate that titanium dioxide particles were highly dispersed and the Ti-O-Si tetrahedral network was formed in the TiO_2/SiO_2 complex particles.The catalyst has a large specific surface area and high photocatalytic reactivity due to more effective separation of electrons and holes,resulting in enhanced degradation of methyl orange. |
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| Keywords: | complex particle TiO_2/SiO_2 methyl orange photocatalytic degradation |
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