Facile synthesis of monodispersed copper oxalate flaky particles in the presence of EDTA

Xing Chen; Kai Huang; Cheng-yan Wang

doi:10.1007/s12613-018-1624-5

Volume 25 Issue 7

Jul. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(7): 762-769

Xing Chen, Kai Huang, and Cheng-yan Wang, Facile synthesis of monodispersed copper oxalate flaky particles in the presence of EDTA, Int. J. Miner. Metall. Mater., 25(2018), No. 7, pp. 762-769. https://doi.org/10.1007/s12613-018-1624-5

Cite this article as:

Xing Chen, Kai Huang, and Cheng-yan Wang, Facile synthesis of monodispersed copper oxalate flaky particles in the presence of EDTA, Int. J. Miner. Metall. Mater., 25(2018), No. 7, pp. 762-769. https://doi.org/10.1007/s12613-018-1624-5

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Research Article

Facile synthesis of monodispersed copper oxalate flaky particles in the presence of EDTA

+ Author Affiliations

Corresponding authors:
Kai Huang E-mail: khuang@metall.ustb.edu.cn

Cheng-yan Wang E-mail: wchy3207@sina.com
Received: 16 October 2017; Revised: 8 April 2018; Accepted: 13 April 2018

Abstract

Abstract

Monodispersed copper oxalate particles with flaky morphology were prepared via a simple one-pot synthesis method. Scanning electron microscope (SEM), X-ray diffraction (XRD), and fourier transform infrared (FTIR) spectra were used to characterize particle morphology, size, phase composition, and functional groups. It was found that the presence of ethylenediaminetetraacetic acid (EDTA) and the solution pH value had strong influence on the morphological and size evolution of the precipitated particles. On the basis of controlled release of copper ions from a Cu²⁺–EDTA complex and Weimarn’s law, a strategy for the controlled synthesis of monodispersed copper oxalate particles was designed by referring to the basic mode of the Stöber method. The inherent nature of crystallization to form the flaky solid in the early stage of precipitation as well as the driving force of the long-lasting low supersaturation in the growth stage was proposed to explain the size and morphological evolution of the copper oxalate precipitates. Thermodynamic equilibrium concentrations of copper(Ⅱ) species in the Cu(Ⅱ)–EDTA–oxalate–H₂O solution system were calculated to help explain the possible formation mechanism of copper oxalate precipitates.
- copper oxalate;
- flaky morphology;
- ethylenediaminetetraacetic acid;
- one-pot synthesis

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