ZnO:CeO2-based nanopowders with low catalytic activity as UV absorbers

被引：91

作者：

de Lima, Juliana Fonseca ^{[1
]}

Martins, Renata Figueredo ^{[1
]}

Neri, Claudio Roberto ^{[1
]}

Serra, Osvaldo Antonio ^{[1
]}

机构：

[1] USP, FFCLRP, Dept Chem, BR-14040901 Ribeirao Preto, SP, Brazil

来源：

APPLIED SURFACE SCIENCE | 2009年 / 255卷 / 22期

基金：

巴西圣保罗研究基金会;

关键词：

Cerium oxide; Ceria; Zinc oxide; Rare earth; Sunscreen; UV protection; OXIDE-DOPED CERIA; CEO2 FINE POWDER; SHIELDING PROPERTIES; PARTICLES;

D O I：

10.1016/j.apsusc.2009.06.071

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：9006 / 9009

页数：4

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