| 微乳法制备纳米TiO2 /SiO2的结构及光催化研究 |
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| 引用本文： | 蒲玉英,方建章,彭峰,李浩. 微乳法制备纳米TiO2 /SiO2的结构及光催化研究[J]. 无机化学学报, 2007, 23(6): 1045-1050 |
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| 作者姓名： | 蒲玉英 方建章 彭峰 李浩 |
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| 作者单位： | 1. 华南师范大学化学与环境学院,广州,510006
2. 华南理工大学化工与能源学院,广州,510640 |
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| 基金项目： | 广东省科技厅科技计划;广东省重点实验室基金 |
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| 摘 要： | Nanosized TiO2 and TiO2/SiO2 particles were prepared by hydrolysis of tetrabutyl titanate (TBOT) and tetraethyl orthosilicate (TEOS) in the TX-100 reverse microemulsion. These particles were characterized by TG-DSC, XRD, FTIR, TEM，N2 adsorption-desorption. Their photocatalytic activity was tested by degradation of methyl orange. The result shows that TiO2/SiO2 nanoparticles are with a monodispersed spherical phase and a uniform size distribution，and TiO2 particles are dispersed on the surface of SiO2. The band for Ti-O-Si vibration in FTIR was observed, the Ti-O-Si bond increased the stability of anatase TiO2, suppressed the phase transformation of titania from anatase to rutile. And due to the addition of SiO2, the average size of titania decreased from 38 nm in pure TiO2 to 5 nm in TiO2/SiO2. It was found, under UV light irradiation, TiO2/SiO2 particles showed higher activity than pure TiO2, and TiO2/SiO2(1/1) particles showed the highest photocatalytic activity on the photocatalytic decomposition of methyl orange, which was influenced by crystal structure, particle size, crystallinity and Surface area Characteristics.
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| 关 键 词： | 纳米TiO2/SiO2； TX-100； 微乳； 结构； 光催化 |
| 文章编号： | 1001-4861（2007）06-1045-06 |
| 修稿时间： | 2006-09-272007-02-27 |
Structure and Photocatalytic Activity of Nanosized TiO2/SiO2 Particles Prepared by Microemulsion |
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| PU Yu-Ying,FANG Jian-Zhang,PENG Feng and LI Hao. Structure and Photocatalytic Activity of Nanosized TiO2/SiO2 Particles Prepared by Microemulsion[J]. Chinese Journal of Inorganic Chemistry, 2007, 23(6): 1045-1050 |
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| Authors: | PU Yu-Ying FANG Jian-Zhang PENG Feng LI Hao |
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| Affiliation: | School of Chemistry and Enviroment, South China Normol University, Guangzhou 510006,School of Chemistry and Enviroment, South China Normol University, Guangzhou 510006,School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640 and School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640 |
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| Abstract: | Nanosized TiO2 and TiO2/SiO2 particles were prepared by hydrolysis of tetrabutyl titanate (TBOT) and tetraethyl orthosilicate (TEOS) in the TX-100 reverse microemulsion. These particles were characterized by TG-DSC, XRD, FTIR, TEM,N2 adsorption-desorption. Their photocatalytic activity was tested by degradation of methyl orange. The result shows that TiO2/SiO2 nanoparticles are with a monodispersed spherical phase and a uniform size distribution,and TiO2 particles are dispersed on the surface of SiO2. The band for Ti-O-Si vibration in FTIR was observed, the Ti-O-Si bond increased the stability of anatase TiO2, suppressed the phase transformation of titania from anatase to rutile. And due to the addition of SiO2, the average size of titania decreased from 38 nm in pure TiO2 to 5 nm in TiO2/SiO2. It was found, under UV light irradiation, TiO2/SiO2 particles showed higher activity than pure TiO2, and TiO2/SiO2(1/1) particles showed the highest photocatalytic activity on the photocatalytic decomposition of methyl orange, which was influenced by crystal structure, particle size, crystallinity and Surface area Characteristics. |
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| Keywords: | nanosized TiO2/SiO2 particles TX-100 microemulsion structure photocatalysis |
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