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Structural and photoluminescence properties of Eu3+ doped Ag2WO4 synthesized by the green coprecipitation methodology

Grant number: 15/13669-1
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): February 01, 2016
Effective date (End): July 31, 2016
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal researcher:Ieda Lucia Viana Rosa
Grantee:Ivo Mateus Pinatti
Supervisor abroad: Jack Silver
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Research place: Brunel University, England  
Associated to the scholarship:13/23995-8 - Synthesis of silver tungstate doped with Eu3+ and the study of their optical, photoluminescent and photocatalytic properties, BP.DR


Silver tungstate (±-Ag2WO4) is a potential material in the field of science and technology due to its several applications, especially in the photoluminescence and photocatalytic field. Eu-doped silver tungstate can be a promising luminescent material since it emission spectra comprises a broad band in the blue region and narrow peaks in the red region. Moreover, new intermediary levels between the valence and conduction bands are created due to the insertion of Eu ions, resulting in a novel electronic configuration for photocatalytic purpose. Previous results developed in São Carlos - UFSCar (FAPESP: 2013/23995-8 - part of CEPID - CDMF 2013/07296-2) showed efficiently synthesis and characterization of undoped and Eu-doped silver tungstate (±-Ag2-3xEuxWO4). However, once the ±-Ag2WO4 matrix presents different clusters sites for Eu3+ occupation due to its complexity host lattice, it is necessary more specified characterizations to understand the behavior of the structural and luminescent modifications caused by the insertion of a different ion into the matrix. The main objective of this internship abroad in "Wolfson Centre for Materials Processing" (Centre for Phosphors and Display Materials) at Brunel University London is to learn how to use new luminescence characterizations in order to better explain the optical properties of the system created using Eu3+ and silver tungstate. In this sense, luminescent characterizations, which will be used to these materials, can give us valuable information concerning excitation and emission spectra, lifetime, judd ofelt parameters calculation, among other, to further explain the structural environment around the Eu3+ surroundings.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PINATTI, IVO M.; FERN, GEORGE R.; LONGO, ELSON; IRELAND, TERRY G.; PEREIRA, PAULA F. S.; ROSA, V, IEDA L.; SILVER, JACK. Luminescence properties of alpha-Ag2WO4 nanorods co-doped with Li+ and Eu3+ cations and their effects on its structure. Journal of Luminescence, v. 206, p. 442-454, FEB 2019. Web of Science Citations: 4.
PINATTI, IVO M.; IRELAND, TERRY G.; FERN, GEORGE R.; ROSA, IEDA L. V.; SILVER, JACK. Low temperature micro Raman and laser induced upconversion and downconversion spectra of europium doped silver tungstate Ag2-3xEuxWO4 nanorods. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, v. 28, n. 10, SI, p. 7029-7035, MAY 2017. Web of Science Citations: 0.

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