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pH-Control as a way to fine-tune the Cu/Cu2O ratio in radiation induced synthesis of Cu2O particles
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry.ORCID iD: 0000-0003-0663-0751
2018 (English)In: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, Vol. 47, no 45, p. 16139-16144Article in journal (Refereed) Published
Abstract [en]

In this work we have optimized the -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 -radiation induced synthesis.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2018. Vol. 47, no 45, p. 16139-16144
National Category
Physical Chemistry
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URN: urn:nbn:se:kth:diva-240347DOI: 10.1039/c8dt02916dISI: 000451018400017PubMedID: 30378612Scopus ID: 2-s2.0-85056968525OAI: oai:DiVA.org:kth-240347DiVA, id: diva2:1271368
Note

QC 20181217

Available from: 2018-12-17 Created: 2018-12-17 Last updated: 2019-04-08Bibliographically approved

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Li, ZhuofengSoroka, InnaJonsson, Mats

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