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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Single crystalline rhabdophane-type CePO4 nanoparticles as efficient UV filters

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Author(s):
Lima, Juliana F. [1, 2] ; de Sousa Filho, Paulo C. [1, 3] ; Serra, Osvaldo A. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Chem, Rare Earth Lab, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil
[2] Univ Estado Rio De Janeiro, Inst Chem, Dept Gen & Inorgan Chem, R Sao Francisco Xavier 524, BR-20550900 Rio De Janeiro, RJ - Brazil
[3] Univ Paris Saclay, Ecole Polytech, Solid State Chem Grp, Lab Phys Matiere Condensee, F-91128 Palaiseau - France
Total Affiliations: 3
Document type: Journal article
Source: CERAMICS INTERNATIONAL; v. 42, n. 6, p. 7422-7431, MAY 1 2016.
Web of Science Citations: 9
Abstract

Cerium-based materials have shown good results when applied as inorganic UV filters, either absorbing and/or scattering light. Although most papers report the use of Ce(IV), Ce(III) has shown better results for UV protection applications, confirmed by photocatalysis involving the degradation of castor oil, and UV vis reflectance and absorbance spectroscopies. Reverse microemulsions have been widely employed to obtain nanosized particles with controlled morphology, thus water-in-oil microemulsion syntheses of cerium(III) orthophosphates using cetyltrimethylammonium bromide and 1-butanol as surfactant and co-surfactant are reported. Cerium(IV) oxide particles have been synthesized by the same way for concrete comparisons. The variations in the microemulsion compositions and their effects in the morphology and UV filter efficiency have been investigated. Electron micrographs evidence the formation of well dispersed and singly crystalline rhabdophane-type CePO4 nanorods, which display longer lengths as the surfactant amount decreases. The observation of D-2 <- F-2(5/2) Ce3+ transitions, ideal optical band gap energies (2.7-2.8 eV) and, the formation of nanosized particles support the applicability of CePO4 for UV protection. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

FAPESP's process: 13/01669-1 - Nanostructured phosphors and core@shell systems containing rare earths: applications in biological labeling, lighting, and visualization
Grantee:Paulo Cesar de Sousa Filho
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 12/24165-6 - Cerium, titanium, zinc oxide systems: Evaluation of syntheses and structural and morphological properties with photophysical and photochemical applications
Grantee:Juliana Fonseca de Lima
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 08/09629-0 - Cerium compounds with applications in the absorption of ultraviolet radiation
Grantee:Juliana Fonseca de Lima
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 14/22930-2 - Rare Earth-based colloidal luminescent nanoparticles: fundamental studies at the single particle scale and applications as biolabels
Grantee:Paulo Cesar de Sousa Filho
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor