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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 3    June 2007

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Preparation and formation mechanism of Al2O3 nanoparticles by reverse microemulsion
HUANG Ke-long(黄可龙), YIN Liang-guo(尹良果),
LIU Su-qin(刘素琴), LI Chao-jian(李朝建)

School of Chemistry and Chemical Engineering, Central South University,
Changsha 410083, China

Abstract:Al2O3 nanoparticles were prepared by polyethylene glycol octylphenyl ether(Triton X-100)/n-butyl alcohol/cyclohexane/ water W/O reverse microemulsion. The proper calcination temperature was determined at 1 150 ℃ by thermal analysis of the precursor products. The structures and morphologies of Al2O3 nanoparticles were characterized by X-ray diffraction, transmission electron microscopy and UV-Vis spectra. The influences of mole ratio of water to surfactant on the morphologies and the sizes of the Al2O3 nanoparticles were studied. With the increase of surfactant content, the particles size becomes larger. The agglomeration of nanoparticles was solved successfully. And the formation mechanisms of Al2O3 nanoparticles in the reverse microemulsion were also discussed.

 

Key words: reverse microemulsion; Al2O3; nanoparticle; formation mechanism

ISSN 1672-7029
CN 43-1423/U

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