Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 22, Pages 9006-9009Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2009.06.071
Keywords
Cerium oxide; Ceria; Zinc oxide; Rare earth; Sunscreen; UV protection
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Funding
- CAPES
- CNPq
- FAPESP
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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 degrees C), that were characterized by X-ray diffraction, scanning electronmicroscopy, UV-vis reflectance. Their catalytic and photocatalytic activities were also evaluated. ZnO:CeO2 systems present higher UV absorption and transparency in the visible region. The photocatalytic activity of ZnO:CeO2 systems for the oxidation of organic materials is much smaller than that of titania, ceria and zinc oxide, suggesting that ZnO:CeO2 systems are promising candidates for use as optical materials in UV-filters. (C) 2009 Elsevier B.V. All rights reserved.
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