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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (06): 752-756. 上一篇    下一篇

研究简报

固态反应制备纳米钙钛矿型物质及其反应机理

丁士文*,1，张圆圆2，冯春燕3，李兰芬1   

  1. (1河北大学化学与环境科学学院 保定 071002)
    (2张家口市宣化区第一中学 张家口 075100)
    (3石家庄科技工程职业学院 石家庄 050800)
  • 投稿日期:2010-04-07 修回日期:2010-09-24 发布日期:2010-11-01
  • 通讯作者: 丁士文 E-mail:dingsw@mail.hbu.edu.cn
  • 基金资助:

    低温固态反应制备纳米钛酸钡基PTCR材料及其性能研究

Synthesis and Mechanism Research of Nano-perovskite Materials by Solid-state Reaction

Ding Shiwen*,1 Zhang Yuanyuan2 Feng Chunyan3 Li Lanfen1   

  1. (1 College of Chemistry and Environmental Science, Hebei University, Baoding 071002)
    (2 Xuanhua No.1 Middle School of Zhangjiakou, Zhangjiakou 075100)
    (3 Shijiangzhuang Vocational College for Scientific and Technical Engineering, Shijiazhuang 050800)
  • Received:2010-04-07 Revised:2010-09-24 Published:2010-11-01

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1579

被引次数

14

以TiCl4和碱土金属氢氧化物为原料, 采用低温固态反应合成了钙钛矿纳米晶. 首先, TiCl4水解制备高活性TiO2•H2O (H2TiO3), 再分别与碱土金属氢氧化物按物质的量比1∶1均匀混合研磨1 h后, 在一定温度下反应. XRD分析显示产物均为钙钛矿型物质. TEM形貌观察, 粒子均匀, 分散性较好, 平均粒径小于80 nm. 通过对不同反应温度和反应时间产物的XRD分析推断出了化学反应为该低温固态反应速度控制步骤, 并分析了影响反应温度的可能因素.

关键词: 固态反应, 纳米钙钛矿, 制备, 反应机理

Nano-perovskite nanocrystals were synthesized by a solid-state reaction at low temperature by using TiCl4 and alkaline-earth metal hydroxides as raw materials. Firstly, highly-active TiO2•H2O (H2TiO3) was prepared by the hydrolysis of TiCl4. Then the mixtures of TiO2•H2O and alkaline-earth metal hydroxides with molar ratio of 1∶1 were ground for 1 h, and then reacted at a certain temperature. XRD analysis demonstrates that the products are perovskite-type materials. TEM photograph shows that the particles are uniform in shape and dispersed well with average size less than 80 nm in diameter. It can be concluded from XRD patterns that the chemical reaction is the rate-determining step in this low temperature solid state reaction. Furthermore, the formation process of the as-obtained perovskite-type materials were investigated in detail.

Key words: solid-state reaction, nano-perovskite, preparation, mechanism