Preparation of BaCrO4 particles in the presence of EDTA from aqueous solutions

BaCrO 4 particles with well-defined morphologies have been synthesized in the presence of EDTA as a crystal growth modifier from aqueous solutions. The influence of pH on the morphology of BaCrO 4 crystals with and without EDTA additive was investigated to better understand the formation mechanism....

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Bibliographic Details
Published inJournal of coordination chemistry Vol. 65; no. 14; pp. 2432 - 2441
Main Authors Liang, Xue-Song, Ouyang, Jia-Hu, Liu, Zhan-Guo
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis Group 20.07.2012
Taylor & Francis Ltd
Subjects
Aggregation
Aqueous solutions
Atoms & subatomic particles
BaCrO
Crystal growth
EDTA
Nanostructured materials
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Summary:BaCrO 4 particles with well-defined morphologies have been synthesized in the presence of EDTA as a crystal growth modifier from aqueous solutions. The influence of pH on the morphology of BaCrO 4 crystals with and without EDTA additive was investigated to better understand the formation mechanism. EDTA has a strong interaction with the crystal faces of BaCrO 4 and influences the final morphology of BaCrO 4 crystals. In the presence of EDTA, BaCrO 4 particles at pH = 6 always exhibit a spindle-like morphology due to the large inhibition effect of EDTA on the BaCrO 4 crystallization. With decreasing pH, the particle morphology changes into a peanut-type at both pH = 5 and pH = 4 due to the relatively low inhibition and the following secondary heterogeneous nucleation and growth. The possible morphological evolution of BaCrO 4 particles is also proposed.
ISSN:0095-8972
1029-0389
DOI:10.1080/00958972.2012.696106