Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (05): 556-559.doi: 10.3866/PKU.WHXB20050519

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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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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