Sol-hydrothermal synthesis and hydrothermally structural evolution of nanocrystal titanium dioxide

被引:306
作者
Wu, MM [1 ]
Lin, G
Chen, DH
Wang, GG
He, D
Feng, SH
Xu, RR
机构
[1] Zhongshan Univ, Sch Chem & Chem Engn, State Key Lab Ultrafast Laser & Spectroscopy, Guangzhou 510275, Peoples R China
[2] Jilin Univ, Key Lab Inorgan Synthesis & Preparat Chem, Changchun 130023, Peoples R China
关键词
D O I
10.1021/cm0102739
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A sol-hydrothermal method has been proposed to prepare uniform and unaggregated nanocrystals of pure anatase and rutile from various acidic mediums. The phase formation, particle sizes, and morphologies varying with different acids and their concentrations at different reaction temperatures and times have been investigated using X-ray diffraction and transmission electron microscopy. The use of HCl and the effect of its concentrations on the formation of rutile phase at different temperatures for various reaction times have been described in detail. The effect of the addition of NaCl salt on particle sizes and rutile fractions has also been studied. In this work, the phase transformation from anatase to rutile in the presence of and the absence of NaCl salt has been considered both in neutral and in acidic mediums, The presence of a trace rutile in starting materials of anatase can show obvious effects on the phase transformation under hydrothermal conditions.
引用
收藏
页码:1974 / 1980
页数:7
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