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Dispersion and surface functionalization of oxide nanoparticles for transparent photocatalytic and UV-protecting coatings and sunscreens
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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2013 (English)In: Science and Technology of Advanced Materials, ISSN 1468-6996, E-ISSN 1878-5514, Vol. 14, no 2, 023001- p.Article, review/survey (Refereed) Published
Abstract [en]

This review describes recent efforts on the synthesis, dispersion and surface functionalization of the three dominating oxide nanoparticles used for photocatalytic, UV-blocking and sunscreen applications: titania, zinc oxide, and ceria. The gas phase and liquid phase synthesis is described briefly and examples are given of how weakly aggregated photocatalytic or UV-absorbing oxide nanoparticles with different composition, morphology and size can be generated. The principles of deagglomeration are reviewed and the specific challenges for nanoparticles highlighted. The stabilization of oxide nanoparticles in both aqueous and non-aqueous media requires a good understanding of the magnitude of the interparticle forces and the surface chemistry of the materials. Quantitative estimates of the Hamaker constants in various media and measurements of the isoelectric points for the different oxide nanoparticles are presented together with an overview of different additives used to prepare stable dispersions. The structural and chemical requirements and the various routes to produce transparent photocatalytic and nanoparticle-based UV-protecting coatings, and UV-blocking sunscreens are described and discussed.

Place, publisher, year, edition, pages
2013. Vol. 14, no 2, 023001- p.
Keyword [en]
dispersion, functionalization, synthesis, nanoparticles, zinc oxide, titanium dioxide, cerium dioxide, coatings, sunscreens, photocatalysis, transparency
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-90386DOI: 10.1088/1468-6996/14/2/023001ISI: 000318267000001OAI: oai:DiVA.org:su-90386DiVA: diva2:625772
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AuthorCount:7;

Available from: 2013-06-05 Created: 2013-06-03 Last updated: 2017-12-06Bibliographically approved

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