物理化学学报 >> 2008, Vol. 24 >> Issue (12): 2287-2292.doi: 10.3866/PKU.WHXB20081223

研究论文 上一篇    下一篇

粒径可控球形TiO2的制备

扈玫珑, 白晨光, 徐盛明, 徐刚, 梁栋   

  1. 重庆大学材料科学与工程学院, 重庆 400030; 清华大学核能与新能源技术研究院, 北京 100084
  • 收稿日期:2008-07-09 修回日期:2008-08-26 发布日期:2008-12-04
  • 通讯作者: 白晨光; 徐盛明 E-mail:bguang@cqu.edu.cn; smxu@tsinghua.edu.cn

Preparation of the Size-Controlled TiO2 with Spherical Morphology

HU Mei-Long, BAI Chen-Guang, XU Sheng-Ming, XU Gang, LIANG Dong   

  1. College of Material Science and Engineering, Chongqing University, Chongqing 400030, P. R. China; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China
  • Received:2008-07-09 Revised:2008-08-26 Published:2008-12-04
  • Contact: BAI Chen-Guang; XU Sheng-Ming E-mail:bguang@cqu.edu.cn; smxu@tsinghua.edu.cn

摘要: 在正丙醇与水的混合溶剂体系中以Ti(SO4)2为前驱物制备得到了粒径分布窄, 分散性好的球形TiO2. 对表面活性剂种类及用量, 反应物浓度及焙烧温度和时间等影响因素进行了研究, 结果表明, 在正丙醇与水的体积比为1:1的条件下, 以聚乙烯吡咯烷酮(PVP)为表面活性剂, 温度为70-90 ℃时可制得粒径分布窄、分散性好的高质量的球形TiO2颗粒. 通过TG-DSC、SEM、XRD等分析表明, 颗粒粒度大小及粒径分布受表面活性剂浓度和反应前驱物浓度影响大; 物相间的转化主要由焙烧温度和时间来决定. 并引入LaMer模型对颗粒形核、长大的过程进行理论说明.

关键词: 球形TiO2, 粒径分布, 分散性, 物相转化, LaMer模型

Abstract: Spherical Titania (TiO2) with narrow size distribution and nice dispersibility was obtained by hydrolysis in the mixed solvent of 1-propanol and de-ionized water from titanium sulfate (Ti(SO4)2). Parameters like surfactant, precursor concentration, calcination temperature, and calcination time were investigated. The results showed that high quality TiO2 could be synthesized using polyvinylpyrrolidone (PVP) as surfactant when the volume ratio of 1-propanol to de-ionized water was 1:1 at 70-90 ℃. And the optimal surfactant concentration had an important impact on the size distribution and dispersibility. The products were characterized by TG-DSC, SEM, and XRD. The results displayed that the size and size distribution of the particles were affected by the surfactant concentration and the precursor concentration. However, phase transformation of TiO2 was mainly determined by calcination temperature and time. And a LaMer model was introduced to explain the nucleation and growth of the TiO2 particles.

Key words: Spherical TiO2, Size distribution, Dispersibility, Phase transformation, LaMer model

MSC2000: 

  • O648