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

共 17 条

[1] CO oxidation on Pd/CeO2-ZrO2 catalysts
Bekyarova, E
Fornasiero, P
Kaspar, J
Graziani, M
[J]. CATALYSIS TODAY, 1998, 45 (1-4) : 179 - 183
[2] UV absorption properties of ceria-modified compositions within the fluorite-type solid solution CeO2-Y6WO12
Chevire, Francois
Munoz, Francisco
Baker, Charles F.
Tessier, Franck
Larcher, Olivier
Boujday, Souhir
Colbeau-Justin, Christophe
Marchand, Roger
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 2006, 179 (10) : 3184 - 3190
[3] *CTR DIFFR DAT JOI, 1988, POWD DIFFR FIL PDF 2
[4] Cullity B. D., 1978, The Elements of X-Ray Diffraction, V2nd
[5] Inorganic sunscreens
Dransfield, GP
[J]. RADIATION PROTECTION DOSIMETRY, 2000, 91 (1-3) : 271 - 273
[6] Resistive oxygen gas sensors based on CeO2 fine powder prepared using mist pyrolysis
Izu, N
Shin, W
Murayarna, N
Kanzaki, S
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 2002, 87 (01) : 95 - 98
[7] Crystallization behavior of nano-ceria powders by hydrothennal synthesis using a mixture of H2O2 and NH4OH
Lee, JS
Choi, SC
[J]. MATERIALS LETTERS, 2004, 58 (3-4) : 390 - 393
[8] UV-shielding properties of zinc oxide-doped ceria fine powders derived via soft solution chemical routes
Li, RX
Yabe, S
Yamashita, M
Momose, S
Yoshida, S
Yin, S
Sato, T
[J]. MATERIALS CHEMISTRY AND PHYSICS, 2002, 75 (1-3) : 39 - 44
[9] Synthesis of BN-coated CeO2 fine powder as a new UV blocking material
Masui, T
Yamamoto, M
Sakata, T
Mori, H
Adachi, G
[J]. JOURNAL OF MATERIALS CHEMISTRY, 2000, 10 (02) : 353 - 357
[10] Microfine zinc oxide (Z-Cote) as a photostable UVA/UVB sunblock agent
Mitchnick, MA
Fairhurst, D
Pinnell, SR
[J]. JOURNAL OF THE AMERICAN ACADEMY OF DERMATOLOGY, 1999, 40 (01) : 85 - 90

← 1 2 →