| 碳黑改性TiO2薄膜光催化剂的结构性质 |
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| 引用本文： | 陈中颖,余刚,张彭义,蒋展鹏.碳黑改性TiO2薄膜光催化剂的结构性质[J].环境科学,2002,23(2):55-59. |
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| 作者姓名： | 陈中颖 余刚 张彭义 蒋展鹏 |
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| 作者单位： | 清华大学环境科学与工程系环境模拟与污染控制国家重点实验室 北京100084;;清华大学环境科学与工程系环境模拟与污染控制国家重点实验室 北京100084;;清华大学环境科学与工程系环境模拟与污染控制国家重点实验室 北京100084;;清华大学环境科学与工程系环境模拟与污染控制国家重点实验室 北京100084; |
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| 基金项目： | 教育部跨世纪人才培养计划资助项目(1998);国家自然科学基金青年基金项目(59908004) |
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| 摘 要： | 通过碳黑掺杂制备了改性的TiO2薄膜光催化剂(CB-TiO2),并采用液氮吸附、X射线衍射(XRD)和紫外-可见光漫反射光谱(DRS)对催化剂的比表面积、物相、晶粒度和最大激发波长等结构性质进行了表征.结果表明,CB-TiO2的吸附性能大大改善,不同热处理温度下,BET比表面积增加50%～80%;同时碳黑掺杂能够减小催化剂的晶粒尺度,使相变温度降低.相应的光催化降解试验也表明,碳黑改性TiO2的活性大大提高,其一级反应速率常数为普通TiO2的1.5倍.
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| 关 键 词： | 光催化氧化 TiO2薄膜 碳黑改性 比表面积 XRD DRS |
| 文章编号： | 0250-3301(2002)02-05-0055 |
| 收稿时间： | 2001/2/16 0:00:00 |
| 修稿时间： | 6/1/2001 12:00:00 AM |
Structural Properties of TiO2 Thin Film Modified by Carbon Black |
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| Chen Zhongying,Yu Gang,Zhang Pengyi and Jiang Zhanpeng.Structural Properties of TiO2 Thin Film Modified by Carbon Black[J].Chinese Journal of Environmental Science,2002,23(2):55-59. |
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| Authors: | Chen Zhongying Yu Gang Zhang Pengyi and Jiang Zhanpeng |
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| Institution: | State Key Joint Lab of Environment Simulation and Pollution Control, Dept. of Environ. Sci. & Eng., Tsinghua Univ., Beijing 100084, China. chenzhy97@mails.tsinghua.edu.cn |
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| Abstract: | TiO2 photocatalytic film(CB-TiO2) modified by doping carbon black was prepared, and the some structural properties, such as specific surface area, phase, crystal grain size and excitation wavelength were gave, through liquid nitrogen adsorption, X-ray diffraction(XRD) and diffuse reflection spectrum(DRS). The results indicated that adsorbability of CB-TiO2 was greatly improved, BET specific surface area of which enhanced 50%-80% than that of TiO2, baked under 300 degrees C-500 degrees C. And CB modification reduced the crystal grain size, so the temperature of phase transformation was decreased. Corresponding, the photocatalytic activity of CB-TiO2 also was greatly improved, the reaction rate of which was 1.5 times of that of TiO2. |
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| Keywords: | photocatalytic oxidation TiO2 thin film carbon black modification specific surface area XRD DRS |
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