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无机材料学报

无机材料学报

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Al2O3异质复合对TiO2纳米晶晶型转变和晶粒生长的影响

王志义1,2, 崔作林2   

  1. 1. 中国海洋大学化学化工学院, 青岛 266003; 2. 青岛科技大学材料与环境科学学院, 青岛 266042
  • 收稿日期:2004-12-27 修回日期:2005-04-19 出版日期:2006-01-20 网络出版日期:2006-01-20

Effects of Heterogeneous Composite Agent Al2O3 on Phase Transition Process and Particle Growth of TiO2 Nanocrystal

WANG Zhi-Yi1,2, CUI Zuo-Lin2   

  1. 1. Ocean University of China, Qingdao 266003, China; 2. Qingdao University of Science and Technology, Qingdao 266042, China
  • Received:2004-12-27 Revised:2005-04-19 Published:2006-01-20 Online:2006-01-20

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摘要： 以Al2O3为异质相, 采用液相共沉淀法, 考察了异质相的复合及复合量对TiO2纳米晶晶型转化、晶粒生长及紫外-可见光吸收性能的影响, 同时对其复合结构进行了初步解析. 结
果表明: TiO2晶经Al2O3复合后, 其相变过程和晶粒生长均得到显著的抑制, 900℃仍完全是锐钛矿结构, 950～1050℃之间为良好的混晶结构; 950℃晶粒呈球形,
粒径平均在20～30nm左右, 分散均匀, 其紫外-可见光吸收特性较700℃纯TiO2晶有较大的提高.

关键词: TiO2, Al2O3, 异质相, 纳米复合晶

Abstract: TiO2 composite oxide nanocrystals were prepared by a chemical co-precipitation method with Al2O3 as heterogeneous composite agent and TiCl4 as starting materials. The influences
of the heterogeneous composite agent on TiO2 phase transition process, particles growth and optical absorbance in UV and visible region were studied in detail, and the composite structure was
elementarily concluded. The results show that after compounded by Al2O3, the phase transition process and particles growth of TiO2 oxcide nanocrystal are restrained notablely. TiO2 composite
oxide nanocrystals are with anatase structure entirely after calcined at 900℃, and well mixed crystalline structure in the range of 950～1050℃, and the particles after calcined at 950℃
are spherical, average diameter 20～30nm, dispersed equably, and have no reuniting phenomenon, and have the super optical absorbance in UV-Vis region than TiO2 nanocrystal after calcined at 700℃.

Key words: TiO2, Al2O3, heterogeneous agent, composite nanocrystal

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