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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (13): 1389-1392. 上一篇    下一篇

研究论文

胶体模板法制备有序大孔TiO2材料

麻明友*   

  1. (湖南吉首大学化学化工学院 吉首 416000)
  • 投稿日期:2006-03-13 修回日期:2006-06-07 发布日期:2006-07-14
  • 通讯作者: 麻明友

Synthesis of Ordered Macroporous Titania Using Colloid as Template

MA Ming-You*   

  1. (College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000)
  • Received:2006-03-13 Revised:2006-06-07 Published:2006-07-14
  • Contact: MA Ming-You

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以单分散的聚甲基丙烯酸甲酯(PMMA)微球为胶体模板, 采用钛酸丁酯、水、乙醇、盐酸等配成的混合溶胶填充在微球间间隙, 经水解形成凝胶, 然后通过程序升温焙烧去掉单分散的PMMA微球, 可得有序TiO2大孔材料. 实验结果表明, 溶胶的配比为V(钛酸丁酯)∶V(水)∶V(乙醇)∶V(盐酸)＝5∶2∶3∶1, 在空气中凝胶20 h. 去掉单分散的PMMA微球的程序升温控制的条件为1 ℃/min的升温速率升到250 ℃恒定3 h, 再以2 ℃/min的升温速率升到450 ℃恒定8 h, 最后以10 ℃/min的降温速率降到室温.

关键词: 聚甲基丙烯酸甲酯微球, 二氧化钛, 溶胶-凝胶法, 大孔材料

The ordered macroporous titania were synthesized using PMMA sphere colloid crystal as template and the Sol-Gel method. The PMMA spheres were removed by calcinations. The results showed that the sol of Ti(BuO)4, water, ethanol and hydrochloric acid was prepared according to volume ratio of V[Ti(BuO)4]∶V(H2O)∶V(EtOH)∶V(HCl) is 5∶2∶3∶1 and the gelled time was 20 h in air. Set the temperature program of calcinating PMMA spheres as follows: the rate of warming temperature was 1 ℃/min from room temperature to 250 ℃ and 2 ℃/min from 250 ℃ to 450 ℃, maintained it at 250 ℃ for 3 h, and at 450 ℃ for 8 h, the rate of decelerating temperature was 10 ℃/min from 450 ℃ to room temperature.

Key words: poly(methyl methacrylate) microsphere, titania, sol-gel method, macroporous