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UV-shielding property, photocatalytic activity and photocytotoxicity of ceria colloid solutions

Paper ID Volume ID Publish Year Pages File Format Full-Text
29915 44446 2011 7 PDF Available
Title
UV-shielding property, photocatalytic activity and photocytotoxicity of ceria colloid solutions
Abstract

UV-shielding property, photocatalytic activity and cytotoxicity (including photocytotoxicity) of citrate-stabilized ceria colloid solutions were studied. It was established that UV-shielding property (namely, the sun protection factor, the critical absorption wavelength and the UVA/UVB-ratio) of ceria nanoparticles are as good as those of titanium dioxide and zinc oxide nanoparticles. It was further demonstrated that ceria nanoparticles possesses substantially lower photocatalytic activity, which additionally decreases upon decrease in ceria particle size. It was found that colloid ceria solutions are non-toxic to mouse fibroblasts (L929) and fibroblast-like cells of African Green monkey (VERO). Moreover, ceria nanoparticles are capable to protect these cells from UV-irradiation-induced damage. It was proposed that nanocrystalline ceria could be used not only as UV-blocking material, but also as prophylactic and even therapeutic compound for sunburns treatment.

Keywords
Ceria; Photocatalysis; Photocytotoxicity; Size effect; Sunscreen
First Page Preview
UV-shielding property, photocatalytic activity and photocytotoxicity of ceria colloid solutions
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 102, Issue 1, 10 January 2011, Pages 32–38
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering