| TiO2纳米粒子膜的表面态性质及其光催化活性的研究 |
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| 引用本文： | 曹亚安,陈咏梅,管自生,马颖,吴志芸,白玉白,李铁津,姚建年.TiO2纳米粒子膜的表面态性质及其光催化活性的研究[J].影像科学与光化学,1999,17(2):100-103. |
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| 作者姓名： | 曹亚安 陈咏梅 管自生 马颖 吴志芸 白玉白 李铁津 姚建年 |
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| 作者单位： | 1. 中国科学院感光化学研究所 北京100101;2. 吉林大学化学系 长春130023 |
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| 基金项目： | 中国科学院资助项目，中国科学院基础研究项目 |
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| 摘 要： | TiO2纳米粒子膜催化剂光催化降解水中污染物,与粉末相比具有可重复使用、易回收等优点,近年来,在光化学领域受到人们的高度重视1～3].膜催化剂的表面性质与其光催化活性直接相关,研究这些性质能够为研制、开发高效催化剂提供理论依据.本文采用TiCl4水解法,制备了酸性、碱性条件下TiO2纳米粒子膜.利用原子力显微镜(AFM)、X-射线衍射谱(XRD)、红外光谱(IR)和场诱导表面光电压谱(EFISPS)测定其表面微结构.考察了它们对苯酚降解的光催化活性,讨论了膜催化剂的表面性质对光催化活性的影响.
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| 关 键 词： | TiO2纳米粒子膜 表面态 光催化活性 |
| 收稿时间： | 1999-02-02 |
RELATIONSHIP OF PHOTOCATALYTIC ACTIVITY AND SURFACE STATES OF TiO2 NANOPARTICLE FILM |
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| CAO Yaan,CHEN Yongmei,GUAN Zisheng,MA Ying,WU Zhiyun,BAI Yubai,LI Tiejin,YAO Jiannian.RELATIONSHIP OF PHOTOCATALYTIC ACTIVITY AND SURFACE STATES OF TiO2 NANOPARTICLE FILM[J].Imaging Science and Photochemistry,1999,17(2):100-103. |
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| Authors: | CAO Yaan CHEN Yongmei GUAN Zisheng MA Ying WU Zhiyun BAI Yubai LI Tiejin YAO Jiannian |
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| Affiliation: | 1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China;2. Department of Chemistry, Jilin University, Changchun 130023, P. R. China |
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| Abstract: | TiO2 nanoparticle film catalysts have been prepared in acid and basic conditions
respectively, by method of the hydrolysis of TiCl4. Their surface microstructures and surface
energy levels were tested by infrared (IR) spectra and electrical field induced surface
photovoltage spectra (EFISPS). The results demonstrate that surface properties of the two kinds
of TiO2 films are different. A new peak at 1350 cm-1 due to superoxide radical appears in the IR
spectrum of TiO2 powder prepared by basic condition, while it is not found in the one prepared
by acidic condition. Furthermore, a new peak at 390nm attributed to Ti3+ surface state is also
found in EFISPS of the film obtained from basic colloid, whereas the peak disappears in EFISPS
of the film obtained from acidic colloid. Photodegradation of phenol shows that photocatalytic
activity is affected by surface properties of the film. Photocatalytic activity of the latter is better
than that of the former confirms that Ti3+ reduces photocatalytic activity of catalyst. |
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| Keywords: | TiO2 nanoparticle film surface state photocatalytic activity |
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