Gel�?�sol synthesis and aging effect on highly crystalline anatase nanopowder

Bulletin of materials science

Masoud Askari¹  Sharif Shahini¹  S K Sadrnezhaad¹ 

[1] Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-9466, Tehran, Iran$$Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-9466, Tehran, IranDepartment of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-9466, Tehran, Iran$$

关键词: Gelâ€�?�sol;    anatase;    titania;    nanoparticles;    aging.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Highly crystalline TiO₂ anatase nanoparticles were synthesized via gelâ€�?�sol method by using titanium isopropoxide and triethanolamine. The products were characterized by X-ray diffraction, transmission electron microscopy, thermogravimetric/differential thermal analysis and nitrogen gas absorption methods. The particle size ranged from 7 to 24 nm having specific surface area of 64 to 220 m²/g. Selective Ti(OH)₄ gel specifications and hydrothermal test conditions resulted in thermodynamically-stable phase-formation. Aging at 130°C for 4 h resulted in particle size of 7 nm; while at 130 and 160°C for 12 h resulted in 12 and 21 nm, respectively.

【 授权许可】

Unknown