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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

锐钛矿型TiO2纳米粉体的电化学沉淀法制备及其表征

景介辉1, 孙都成1, 徐秀梅2   

  1. 1. 新疆大学化学化工学院, 乌鲁木齐 830046; 2. 黑龙江科技学院资源环境系, 哈尔滨 150027
  • 收稿日期:2005-01-10 修回日期:2005-03-22 出版日期:2006-01-20 网络出版日期:2006-01-20

Preparation and Characterization of Nano-scale Anatase Titania by Electrolytic Precipitate Method

JING Jie-Hui1, SUN Du-Cheng1, XU Xiu-Mei2   

  1. 1. College of Chemistry and Chemical Engineering, Xinjiang University, Urumuqi 830046, China; 2. Department of Resource and Environment,
    Heilongjiang Scientific and Technological College, Harbin 150027, China
  • Received:2005-01-10 Revised:2005-03-22 Published:2006-01-20 Online:2006-01-20

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摘要： 利用阴离子交换膜为隔膜将电解槽分为两室, 控制阴极室电极的恒定电流密度, 在电解过程中消耗阴极室溶液中的H+浓度, 促使TiO2+与电解产
生的OH-中和水解反应, 形成TiO2·xH2O均匀沉淀, 在不同温度的热处理后,得到不同晶型的纳米TiO2微粒. TEM和XRD分析表明: 在773K焙
烧2h后, TiO2微粒呈锐钛矿型结构, 粒径约为 30～50nm; 在873K热处理后可得到金红石相约占3.85%的锐钛矿型和金红石型混晶结构的TiO2
粉体. 本文对其形成的机理进行了初步的探讨.

关键词: 电解法, 二氧化钛, 纳米粉体

Abstract: The electrolyser was divided into the cathode chamber and the anode chamber by the septum of the anion-exchange membrane. When hydrogen ions in the cathode chamber were consumed under
the electrolyzing process with a constant current density on the cathode, titanyl ions were promoted to react to hydroxide ions produced by electrolyzing
to form uniform deposition of hydrous titania. Titania with different crystal phaseswas produced under different temperatures. TEM and XRD analyses show that the
nanoparticles are spherical and with the average size from 30 to 50nm at 773K, and mainly anatase phase at 873K containing
3.85% rutile. The mechanism of forming ultrafine powder was elementarily investigated.

Key words: electrolytic method, titania, ultrafine

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