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pH-Control as a way to fine-tune the Cu/Cu2O ratio in radiation induced synthesis of Cu2O particles

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Abstract

In this work we have optimized the γ-radiation induced synthesis of Cu–Cu2O particles from aqueous CuSO4 solution by investigating the effect of pH. The obtained precipitate was analyzed by XRD and SEM techniques. The results indicated that at solution pH lower than 3.75, quasi-spherical Cu agglomerates can be formed while at pH higher than 4.40 only octahedron-shaped Cu2O particles are produced. At solution pH in the range from 3.75 to 4.40, a Cu–Cu2O mixture is produced. It was found that the relative amount of Cu2O in the Cu–Cu2O precipitate increases with pH in the studied range. The influence of solution pH on the Cu/Cu2O ratios in the product can be explained on the basis of pH-dependent competition kinetics between the reactions leading to either Cu or Cu2O formation. As a consequence, the composition and morphology of the Cu–Cu2O precipitate can be tuned by controlling pH of the aqueous CuSO4 solution during the γ-radiation induced synthesis.

Graphical abstract: pH-Control as a way to fine-tune the Cu/Cu2O ratio in radiation induced synthesis of Cu2O particles

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Publication details

The article was received on 17 Jul 2018, accepted on 26 Oct 2018 and first published on 29 Oct 2018


Article type: Paper
DOI: 10.1039/C8DT02916D
Citation: Dalton Trans., 2018, Advance Article
  • Open access: Creative Commons BY license
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    pH-Control as a way to fine-tune the Cu/Cu2O ratio in radiation induced synthesis of Cu2O particles

    Z. Li, I. L. Soroka, F. Min and M. Jonsson, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT02916D

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