| 纳米TiO2晶体的制备及光催化性能 |
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| 引用本文： | 李芳柏,古国榜,柏申文,林海山.纳米TiO2晶体的制备及光催化性能[J].华南理工大学学报(自然科学版),1999,27(12):38-43. |
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| 作者姓名： | 李芳柏 古国榜 柏申文 林海山 |
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| 作者单位： | 华南理工大学应用化学系!广州510640 |
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| 摘 要： | 采用Ｓｏｌ－Ｇｅｌ法成功地合成了ＴｉＯ２纳米粉末，并对其光催化性能进行了研究。ＸＲＤ与ＴＥＭ研究结果表明，热处理温度，保温时间等因素对材料结构和颗粒大小影响很大，粉末的平均粒径为８．０－２９．５ｎｍ。
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| 关 键 词： | 纳米粉末 光催化 量子尺寸效应 二氧化钛晶体 |
A STUDY ON THE PREPARATION OF TiO 2 NANO CRYSTALLITE AND ITS PHOTO CATALYTIC ACTIVITY |
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| Li Fangbai,Gu Guobang,Bai Shenwen,Lin Haishan.A STUDY ON THE PREPARATION OF TiO 2 NANO CRYSTALLITE AND ITS PHOTO CATALYTIC ACTIVITY[J].Journal of South China University of Technology(Natural Science Edition),1999,27(12):38-43. |
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| Authors: | Li Fangbai Gu Guobang Bai Shenwen Lin Haishan |
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| Abstract: | TiO 2 nanometer powder with sizes ranging from 8.0?nm to 29.5 nm was prepared by sol gel process with Ti(OBu) 4 as the precursor. XRD and TEM showed changes in structure and particle size of the powder with calcination temperature and time. Based on a model reaction of photocatalytic degradation of methylene blue irradiated by 125?W high pressure mercury lamp, the photo catalytic degradation rates of methylene blue increased with a rise of calcination temperature and the increasing of nano powder sizes. As a result, the quantum size effect drastically influenced the photocatalytic activity of TiO 2 owing to the changes of crystalline pattern and optical absorption spectra. |
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| Keywords: | nanometer powder titanium dioxide photocatalysis quantum size effect |
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