物理化学学报 >> 2001, Vol. 17 >> Issue (08): 713-717.doi: 10.3866/PKU.WHXB20010809

研究论文 上一篇    下一篇

单分散超细二氧化钛颗粒的制备及粒径控制

陈洪龄;王延儒;时钧   

  1. 南京工业大学化工学院,南京 210009
  • 收稿日期:2001-02-23 修回日期:2001-04-03 发布日期:2001-08-15
  • 通讯作者: 陈洪龄 E-mail:hlchen@njuct.edu.cn

Preparation of Monodispersed Superfine Titanium Dioxide Particles and Size Control

Chen Hong-Ling;Wang Yan-Ru;Shi Jun   

  1. Institute of Chemical Engineering, Nanjing University of Technology, Nanjing 210009
  • Received:2001-02-23 Revised:2001-04-03 Published:2001-08-15
  • Contact: Chen Hong-Ling E-mail:hlchen@njuct.edu.cn

摘要: 四氯化钛和三乙醇胺在90 ℃反应生成钛可溶性化合物.该化合物溶液在145 ℃下陈化反应48 h,生成单分散性较好的锐钛矿型二氧化钛颗粒.讨论了钛可溶性化合物的形成和水解过程.陈化液的pH值在0.9~10.5变化时, 对颗粒大小和形状有显著的影响, 酸度越大, 颗粒越小.颗粒的大小也可以通过加入晶种得到控制.在pH为10.5时加入晶种, 颗粒的尺寸变小, 形貌基本维持棒状.用TEM和XRD等手段测定了颗粒的晶型、形貌和比表面积.

关键词: 四氯化钛, 二氧化钛, 超细颗粒, 粒径控制, 晶种

Abstract: Titanium tetrachloride reacted with triethanolamine to form soluble titanium compound. The compound was aged at 145 ℃ for 48 h forming monodispersed titanium dioxide particles. The formation and hydrolysis of the compound were discussed. Change of the pH value of the aging solution between 0.9 and 10.5 great influences the particle size and shape, the higher the acidity, the less the particles size. Rod particles are formed at pH 10.5 and spherelike particles are formed at the pH less than 10.0. The particle size can also be controlled by adding seeds. In the case of adding seeds at pH 10.5, the shape of the particles keeps rod. Crystal habits of the particles were detected by TEM and XRD etc.

Key words: Titanium tetrachloride, Titanium dioxide, Superfine particles, Size control, Seed