Synthesis of copper and copper oxide nanomaterials by electrical discharges in water with various electrical conductivities

License
Published under license by AIP Publishing

Embargo End Date
2021-01-09

Type
Article

Authors
Glad, Xavier
Profili, Jacopo
Cha, Min Suk
Hamdan, Ahmad

KAUST Department
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division

Online Publication Date
2020-01-09

Print Publication Date
2020-01-14

Date
2020-01-09

Abstract
In the present study, Cu-based nanomaterials are synthesized by initiating spark discharges between two copper electrodes immersed in de-ionized water. The electrical conductivity of water is varied by adding HCl at very low concentrations. The discharge and water properties are determined by measuring the current-voltage waveforms and monitoring water acidity and conductivity, respectively. Scanning electron and transmission electron microscopy analyses of the produced nanoparticles show that increasing water conductivity, by adding HCl, promotes the synthesis of Cu-based nanomaterials. Depending on the initial water conductivity, various nanostructures are observed, including nanoflakes of cuprite (Cu2O), dendrites with high Cu content, and unordered micrometric aggregates with a mixed Cu/Cu2O content. The initial water conductivity also affects the chemical structure, mainly the relative Cu/Cu2O crystalline content.

Citation
Glad, X., Profili, J., Cha, M. S., & Hamdan, A. (2020). Synthesis of copper and copper oxide nanomaterials by electrical discharges in water with various electrical conductivities. Journal of Applied Physics, 127(2), 023302. doi:10.1063/1.5129647

Acknowledgements
This publication is based upon the work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2018-CARF-1975.

Publisher
AIP Publishing

Journal
Journal of Applied Physics

DOI
10.1063/1.5129647

Additional Links
http://aip.scitation.org/doi/10.1063/1.5129647https://aip.scitation.org/doi/pdf/10.1063/1.5129647

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