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Nanostructured Cu\(_2\)O Synthesized via Bipolar Electrochemistry

McWilliams, Steven, Flynn, Connor D., McWilliams, Jennifer, Arnold, Donna C., Wahyuono, Ruri Agung, Undisz, Andreas, Rettenmayr, Markus, Ignaszak, Anna (2019) Nanostructured Cu\(_2\)O Synthesized via Bipolar Electrochemistry. Nanomaterials, 9 (12). ISSN 2079-4991. (doi:10.3390/nano9121781)

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Abstract

Cuprous oxide (Cu\(_2\)O) was synthesized for the first time via an open bipolar electrochemistry (BPE) approach and characterized in parallel with the commercially available material. As compared to the reference, Cu\(_2\)O formed through a BPE reaction demonstrated a decrease in particle size; an increase in photocurrent; more efficient light scavenging; and structure-correlated changes in the flat band potential and charge carrier concentration. More importantly, as-synthesized oxides were all phase-pure, defect-free, and had an average crystallite size of 20 nm. Ultimately, this study demonstrates the impact of reaction conditions (e.g., applied potential, reaction time) on structure, morphology, surface chemistry, and photo-electrochemical activity of semiconducting oxides, and at the same time, the ability to maintain a green synthetic protocol and potentially create a scalable product. In the proposed BPE synthesis, we introduced a common food supplement (potassium gluconate) as a reducing and complexing agent, and as an electrolyte, allowing us to replace the more harmful reactants that are conventionally used in Cu\(_2\)O production. In addition, in the BPE process very corrosive reactants, such as hydroxides and metal precursors (required for synthesis of oxides), are generated in situ in stoichiometric quantity, providing an alternative methodology to generate various nanostructured materials in high yields under mild conditions.

Item Type: Article
DOI/Identification number: 10.3390/nano9121781
Uncontrolled keywords: bipolar electrochemistry; green synthesis; substructure; photocurrent; semiconductors
Subjects: Q Science > QD Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Donna Arnold
Date Deposited: 14 Jan 2020 16:38 UTC
Last Modified: 14 Jan 2020 16:38 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/79577 (The current URI for this page, for reference purposes)
Arnold, Donna C.: https://orcid.org/0000-0003-0239-5790
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