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Stability of ZnMgO oxide in a weak alkaline solution
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. Laboratoire de Magnétisme de Bretagne, France. (Institut de la Corrosion)
Laboratoire de Magnétisme de Bretagne, France.
Laboratoire de Magnétisme de Bretagne, France.
RISE - Research Institutes of Sweden, Materials and Production, KIMAB. (Institut de la Corrosion)
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2012 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 520, no 7, p. 2819-2823Article in journal (Refereed) Published
Abstract [en]

Zinc oxide (ZnO) is a chemical compound of great interest used, for example, as photocatalyst in the purification of wastewater or polluted air. However, neither dissolution, nor photo-dissolution of ZnO is negligible: indeed, both processes reduce significantly the efficiency of photocatalysis and then lead to a secondary pollution by free Zn 2 +. In the present study, the stability of ZnMgO thin films in weak alkaline solution is investigated. We demonstrate that the replacement of Zn 2 + ion with Mg 2 + ion results in the production of a Zn 0.84Mg 0.16O solid solution, whose stability is higher than that of the ZnO sample. This alloy, thus, constitutes an alternative to the use of ZnO in photocatalysis applications. To gain more insights into the higher resistance of such alloys to the dissolution process, X-Ray photoelectron spectroscopy measurements were performed. They highlighted the role of OH group adsorption in the experimentally observed enhancement of ZnMgO stability.

Place, publisher, year, edition, pages
2012. Vol. 520, no 7, p. 2819-2823
Keywords [en]
Dissolution, Photo-dissolution, Solid solution, Spray coatings, X-ray photoelectron spectroscopy, Zinc magnesium oxide, Zinc oxide, Alkaline solutions, Dissolution process, OH group, Secondary pollution, Spray coating, ZnMgO, ZnO, Adsorption, Air cleaners, Alkalinity, Chemical compounds, Chemical stability, Chemicals removal (water treatment), Magnesium, Photocatalysis, Photons, Stability, Wastewater, X ray photoelectron spectroscopy, Zinc, Zinc alloys, Solid solutions
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Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-40415DOI: 10.1016/j.tsf.2011.10.033Scopus ID: 2-s2.0-84856389943OAI: oai:DiVA.org:ri-40415DiVA, id: diva2:1361427
Available from: 2019-10-16 Created: 2019-10-16 Last updated: 2019-10-16Bibliographically approved

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