高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (1): 115.

• 论文 • 上一篇    下一篇

超细多孔TiO2的制备及机理研究

赵敬哲, 王子忱, 王莉玮, 薛丽晶, 刘艳华, 杨桦, 赵慕愚   

  1. 吉林大学化学系, 长春 130023
  • 收稿日期:1997-12-24 出版日期:1999-01-24 发布日期:1999-01-24
  • 基金资助:

    国家自然科学基金;吉林省科学发展规划资助;吉林大学无机合成与制备开放实验室资助

The Preparation and Mechanism Studies on Ultrafine Porous Titania

ZHAO Jing-Zhe, WANG Zi-Chen, WANG LI-Wei, XUE LI-Jing, LIU Yan-Hua, YANG Hua, ZHAO Mu-Yu   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1997-12-24 Online:1999-01-24 Published:1999-01-24

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摘要： 以硫酸和氨水为原料,以乙醇为分散剂,采用化学沉淀法合成了超细多孔TiO2,并详细考察了pH值和反应温度对TiO2前驱体结构的影响.多孔TiO2随着焙烧温度的提高,比表面有所降低,导致这一现象的原因是晶粒生长及相转变.从孔分布曲线分析可知,200℃得到样品的一部分微孔,在较高温度的焙烧过程中被烧结,得到了孔分布更为均匀的多孔粉体,由TEM照片可清晰看到多孔TiO2的空间网络结构.

关键词: 超细, 多孔, TiO2, 制备, 机理

Abstract: Ultrafine porous titania pow ders were synthesized by precipitating method with titania sulf ate and ammonia as raw materials and ethanol as dispersing agent.The influences of pHand reaction temperatures on the t ex ture of titania precursor powders were investigated.The causes of surface area reduction with calcining temperat ures are grain growth and phase t ransform ation. Micropores could be sintered as enhancing calcining temperature.from TEM photos space network of porous titania is clearly seen.

Key words: Ultrafine, Porous, TiO2, Preparation, Mechanism

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