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Catalytic synthesis and characterization of spindle-type α–Fe2O3 particles

Published online by Cambridge University Press:  01 March 2005

Xiuli Zhang ,
Hui Liu  and
Yu Wei
Xiuli Zhang
Affiliation:
College of Chemistry, Heibei Normal University, Shijiazhuang 050016, People's Republic of China
Hui Liu
Affiliation:
College of Chemistry, Heibei Normal University, Shijiazhuang 050016, People's Republic of China
Yu Wei*
Affiliation:
College of Chemistry, Heibei Normal University, Shijiazhuang 050016, People's Republic of China
*
a)Address all correspondence to this author. e-mail: weiyu@mail.hebtu.edu.cn
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Abstract

Catalytic synthesis of spindle-type hematite particles was studied for the first time under the conditions of boiling reflux and pH values ranging from 4 to 7, using Fe2(SO4)3 and NaOH as raw material, a trace amount of FeSO4 as the catalyst, and NaH2PO4 as the growth-regulating agent. The final products were characterized by x-ray diffraction, high-resolution electron microscopy, scanning electron microscopy, and Fourier transform infrared techniques. Primarily, the catalytic effect of ferrous ion on the conversion of ferric hydroxide was investigated. It was found that the addition of a trace amount of ferrous ion promoted fast conversion of ferric hydroxide and remarkably accelerated the transformation process to hematite. The reaction conditions affecting the conversion rate and morphologies in the presence of trace amount of ferrous ion were investigated. The final particles prepared had the characteristics of controlled size, a narrow particle size distribution, and good reproducibility.

Keywords

CatalyticMorphologyNucleation & growth
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 3 , March 2005 , pp. 628 - 635
Copyright
Copyright © Materials Research Society 2005

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