ZnO:CeO(2)-based nanopowders with low catalytic activity as UV absorbers

Ultrafine systems of zinc oxide and cerium oxide for use as ultraviolet filter were synthesized by a non-alkoxide sol-gel process at different temperatures, to obtain solid materials (40 and 70(o)C), that were characterized by X-ray diffraction, scanning electron microscopy, UV-vis reflectance. Thei...

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Published inApplied surface science Vol. 255; no. 22; pp. 9006 - 9009
Main Authors Lima, J.F.d., Martins, R F, Neri, C R, Serra, O A
Format Journal Article
LanguageEnglish
Published 30.08.2009
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Summary:Ultrafine systems of zinc oxide and cerium oxide for use as ultraviolet filter were synthesized by a non-alkoxide sol-gel process at different temperatures, to obtain solid materials (40 and 70(o)C), that were characterized by X-ray diffraction, scanning electron microscopy, UV-vis reflectance. Their catalytic and photocatalytic activities were also evaluated. ZnO:CeO(2) systems present higher UV absorption and transparency in the visible region. The photocatalytic activity of ZnO:CeO(2) systems for the oxidation of organic materials is much smaller than that of titania, ceria and zinc oxide, suggesting that ZnO:CeO(2) systems are promising candidates for use as optical materials in UV-filters.
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ISSN:0169-4332
DOI:10.1016/j.apsusc.2009.06.071