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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International Journal of Minerals, Metallurgy and Materials > 2018 > 25(7): 762-769. > DOI: 10.1007/s12613-018-1624-5

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://dx.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

Xing Chen¹⁾,
Kai Huang^1,2), , and
Cheng-yan Wang^1), ,

Author Affilications

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Beijing Key Lab of Green Recycling and Extraction of Metals, University of Science and Technology Beijing, Beijing 100083, China

Funds:

This work was financially supported by the Special Fundamental Funds by Beijing Scientific Committee for the Project of New Functional Materials for Environmental Remediation (No. 00012245).

Received: 15 October 2017; Revised: 07 April 2018; Accepted: 12 April 2018;

Graphical Abstract

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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References (23)

References

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