物理化学学报 >> 2005, Vol. 21 >> Issue (05): 556-559.doi: 10.3866/PKU.WHXB20050519

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纳米TiO2的制备及对三甲胺气体的敏感性能

吴凤清; 任辉; 邹博; 王竹仪; 张彤; 邹乐辉; 徐宝琨   

  1. 吉林大学化学学院；  吉林大学电子科学与工程学院，长春   130023； 吉林大学生物与农业工程学院，长春   130025
  • 收稿日期:2004-09-08 修回日期:2004-10-25 发布日期:2005-05-15
  • 通讯作者: 吴凤清 E-mail:fqwu@mail.jlu.edu.cn

Preparation of TiO2 Nanocrystalline and Its Sensitive Property to TMA

WU Feng-Qing; REN Hui; ZOU Bo; WANG Zhu-Yi; ZHANG Tong; ZOU Le-Hui; XU Bao-Kun   

  1. College of Chemistry, Jilin University;    College of Electronic Sciences and Engineering, Jilin University, Changchun   130023；  College of Biological & Agricultural Engineering, Jilin University, Changchun   130025
  • Received:2004-09-08 Revised:2004-10-25 Published:2005-05-15
  • Contact: WU Feng-Qing E-mail:fqwu@mail.jlu.edu.cn

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摘要： 用硬脂酸凝胶法制备纳米TiO2材料,并用XRD、TEM、IR对纳米晶的晶型、晶粒大小及形貌进行表征；用XPS分析不同晶型的纳米TiO2表面吸附氧的情况，发现锐钛矿型纳米TiO2比金红石型纳米TiO2有较多的表面吸附氧. 检测了不同晶型纳米TiO2对三甲胺（TMA）气体的敏感性能.结果表明锐钛矿型纳米TiO2对TMA有较高的灵敏度. 对敏感性能的机理进行了讨论.

关键词: 纳米晶, TiO2, 气敏特性, 三甲胺, 鱼鲜度

Abstract: TiO2 nanocrystalline material has been synthesized by stearic-acid gel method. The TiO2 crystal species and grains are characterized by XRD. TEM showed that the TiO2 grains are spherical and well dispersed. The results of XPS illustrated that the absorbed oxygen on anatase TiO2 is much more than that on rutile TiO2. The sensitivity of the two species to trimethylamine (TMA) was studied. The results showed that anatase TiO2 has much higher sensitivity to TMA than rutile TiO2. The mechanism of TiO2 sensitivity to TMA was discussed.

Key words: Nanocrystalline, TiO2, Sensitivity, TMA, Fish freshness