| 纳米TiO2粉晶的光学特性研究 |
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| 引用本文： | 尹荔松,沈辉,张进修. 纳米TiO2粉晶的光学特性研究[J]. 电子学报, 2002, 30(6): 808-810 |
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| 作者姓名： | 尹荔松 沈辉 张进修 |
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| 作者单位： | 1. 中南大学,湖南长沙 410075;2. 中科院广州能源所,广东广州 510070;3. 中山大学物理系,广东广州 510275 |
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| 基金项目： | 中科院百人计划项目;长沙铁道学院基金及湖南省科委资助项目(No.006002,GK2004) |
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| 摘 要： | 用溶胶-凝胶方法(Sol-gel)制备了平均粒度为22nm的纳米TiO2粉晶.用X射线衍射(XRD)分析了粉晶的结构变化,并用红外光谱法(IR)及紫外-可见光谱法(UV-VIS)对粒子的光学特性进行了分析.结果表明:经不同温度热处理的纳米TiO2的光学性能随其晶型转变及粒子尺寸的变化而有着显著变化,与粗晶TiO2相比,纳米TiO2粒子在纳米尺度内,IR吸收边有明显红移和蓝移并存现象,而UV-VIS吸收边随粒子尺寸减小发生蓝移,表现出量子尺寸效应.
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| 关 键 词： | 纳米晶粉 TiO2 光学特性 |
| 文章编号： | 0372-2112(2002)06-0808-03 |
| 收稿时间： | 2000-11-21 |
Preparation and Optics Characteristics of Nanocrystalline TiO2 Powders |
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| YIN Li-song ,,SHEN Hui ,ZHANG Jin-xiu. Preparation and Optics Characteristics of Nanocrystalline TiO2 Powders[J]. Acta Electronica Sinica, 2002, 30(6): 808-810 |
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| Authors: | YIN Li-song SHEN Hui ZHANG Jin-xiu |
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| Affiliation: | 1. Center South University,Changsha,Hunan 410075,China;2. Guangzhou Institute of Energy Conversion,CAS,Guangzhou,Guangdong 510070,China;3. Department of Physics,Zhongshan University,Guangzhou,Guangdong 510275,China |
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| Abstract: | Nanocrystalline TiO 2 powders(average grain-size of 22nm) were prepared by the sol-gel process.The structure of the powders at different annealing temperatures was studied by XRD.Using IR and UV-VIS spectroscopy, the optics-characteristics of the powders have been researched.The result showed with the transformation of crystal style,the optics-characteristics of the powders annealing at different temperatures have remarkable variation.Compared with raw crystal TiO 2,the IR absorbing sides of the nanocrystalline TiO 2 powders shift to both lower frequencies and higher frequencies,and with the grain-size becomes small,the UV-VIS absorbing sides shift to lower frequencies,showing the quantum size effect. |
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| Keywords: | nanocrystalline powder TiO 2 optics characteristics |
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