化学学报 ›› 2003, Vol. 61 ›› Issue (9): 1484-1487. 上一篇    下一篇

研究论文

TiO_2纳米粒子的表面修饰研究

李宗威;朱永法   

  1. 清华大学化学系
  • 发布日期:2003-09-15

Study on the Surface-modification of TiO_2 Nanoparticles

Li Zongwei;Zhu Yongfa   

  1. Department of Chemistry, Tsinghua University
  • Published:2003-09-15

利用表面修饰法合成了油酸(OA)修饰的TiO_2纳米粒子,采用红外光谱(IR )、透射电子显微镜(TEM)和X射线光电子能谱(XPS)对表面修饰的TiO_2纳米粒 子进行了结构表征,并研究了油酸浓度对TiO_2表面覆盖量及在油中分散性能的影 响。研究结果表明通过油酸表面修饰,成功合成了具有油分散性能的纳米TiO_2, 并且获得了油酸修饰量与TiO_2的最佳配比。

关键词: 油酸, 氧化钛, 红外分光光度法, 透射电子显微术, X射线光电子谱法, 结构表征

TiO2 nanoparticles modified by oleic acid ( OA) were prepared using surface-modification method. Infrared spectroscopy (IR), transmission electron microscopy (TEM) and X-ray photoelectron spectra (XPS) were used to investigate' the structure of the modified TiO_2 nanopartieles. Effects of OA concentration on coverage and dispersion in oil were also studied. The optimal proportion of OA to TiO_2 was established. The results indicate that the oleic acid is bonded to the surface of TiO_2 nanoparticles. The OA-modified TiO_2 nanoparticles have good dispersive capacity in organic solvent and mineral oil. An esterification mechanism for the surface-modification is proposed.

Key words: OLEIC ACID, TITANIUM OXIDE, IR, TEM, XPS, STRUCTURE CHARACTERISTICS

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