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Synthesis of silver tungstate doped with Eu3+ and the study of their optical, photoluminescent and photocatalytic properties

Grant number: 13/23995-8
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2014
Effective date (End): August 31, 2018
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Ieda Lucia Viana Rosa
Grantee:Ivo Mateus Pinatti
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID
Associated scholarship(s):15/13669-1 - Structural and photoluminescence properties of Eu3+ doped Ag2WO4 synthesized by the green coprecipitation methodology, BE.EP.DR

Abstract

Noble metal nanoparticle preparation is an interdisciplinary subject that is attracting intense research and development due to both the fundamental and applied scientific value of nanometer scale metals. Tungstates exhibit photoluminescence properties and antimicrobial action. In addition, silver materials exhibit high photocatalytic properties under visible light for dye degradation, bacteria destruction and electrocatalytic property. This research project aims to investigate the photoluminescent and photocatalytic properties of single crystal tungstate silver (Ag2WO4) and doped with Eu3+ (Ag2-3xEuxWO4), using the method of co precipitation, which is fast, does not need high temperatures or require sophisticated equipment and yields materials with homogeneous shape and size without secondary phases. Emission bands of europium ions are easy to study in the visible region due to the structure of the energy levels, which enables its use as a spectroscopic probe. The luminescence properties of these ions, such as fine lines of absorption and emission, are due to electron transitions within the partially filled 4f layer which is protected from the environment by 5s and 5p external electron. In addition, the europium ion has characteristic red emission, can be use for white LEDs when doped tungstates and for site symmetry determination. The powders will be characterized by X-ray diffraction (XRD), Rietveld Refinement, FT-Raman spectroscopy (Raman), Fourier transform infrared spectroscopy (FT-IR), Ultraviolet-visible spectroscopy (UV-vis), Scanning Electron Microscopy with Field Emission Gun (FEG-SEM), Photocatalysis and Photoluminescence spectroscopy (PL).

Scientific publications (11)
(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)
SILVA CHAVES, MARISA DE JESUS; LIMA, GENESIS DE OLIVEIRA; DE ASSIS, MARCELO; SILVA MENDONCA, CARITAS DE JESUS; PINATTI, IVO MATEUS; GOUVEIA, AMANDA FERNANDES; VIANA ROSA, IEDA LUCIA; LONGO, ELSON; PINHEIRO ALMEIDA, MARCIO AURELIO; RODRIGUES DOS SANTOS FRANCO, TERESA CRISTINA. Environmental remediation properties of Bi2WO6 hierarchical nanostructure: A joint experimental and theoretical investigation. Journal of Solid State Chemistry, v. 274, p. 270-279, JUN 2019. Web of Science Citations: 0.
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.; PEREIRA, PAULA F. S.; DE ASSIS, MARCELO; LONGO, ELSON; ROSA, IEDA L. V. Rare earth doped silver tungstate for photoluminescent applications. Journal of Alloys and Compounds, v. 771, p. 433-447, JAN 15 2019. Web of Science Citations: 5.
ROSA, I. L. V.; TAVARES, F. A.; DE MOURA, A. P.; PINATTI, I. M.; DA SILVA, L. F.; LI, M. S.; LONGO, E. Luminescent and gas sensor properties of the ZrO2:Hhpa:Eu3+ Hybrid Compound. Journal of Luminescence, v. 197, p. 38-46, MAY 2018. Web of Science Citations: 1.
PEREIRA, P. F. S.; GOUVEIA, A. F.; ASSIS, M.; DE OLIVEIRA, R. C.; PINATTI, I. M.; PENHA, M.; GONCALVES, R. F.; GRACIA, L.; ANDRES, J.; LONGO, E. ZnWO4 nanocrystals: synthesis, morphology, photoluminescence and photocatalytic properties. Physical Chemistry Chemical Physics, v. 20, n. 3, p. 1923-1937, JAN 21 2018. Web of Science Citations: 21.
COSTA, JOSE ARNALDO S.; DE JESUS, ROBERTA A.; DORST, DIANE D.; PINATTI, IVO M.; OLIVEIRA, LUCAS M. DA R.; DE MESQUITA, MARIA E.; PARANHOS, CAIO MARCIO. Photoluminescent properties of the europium and terbium complexes covalently bonded to functionalized mesoporous material PABA-MCM-41. Journal of Luminescence, v. 192, p. 1149-1156, DEC 2017. Web of Science Citations: 5.
GONCALVES, R. F.; LONGO, E.; MARQUES, A. P. A.; SILVA, M. D. P.; CAVALCANTE, L. S.; NOGUEIRA, I. C.; PINATTI, I. M.; PEREIRA, P. F. S.; GODINHO, M. J. Structural investigation and photoluminescent properties of ZnWO4:Dy3+ nanocrystals. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, v. 28, n. 20, p. 15466-15479, OCT 2017. Web of Science Citations: 6.
PEREIRA, PAULA F. S.; SANTOS, CLAYANE C.; GOUVEIA, AMANDA F.; FERRER, MATEUS M.; PINATTI, IVO M.; BOTELHO, GLEICE; SAMBRANO, JULIO R.; ROSA, IEDA L. V.; ANDRES, JUAN; LONGO, ELSON. alpha-Ag2-2xZnxWO4 (0 <= x <= 0.25) Solid Solutions: Structure, Morphology, and Optical Properties. Inorganic Chemistry, v. 56, n. 13, p. 7360-7372, JUL 3 2017. Web of Science Citations: 9.
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.
PEREIRA, WYLLAMANNEY DA SILVA; FERRER, MATEUS MENEGHETTI; BOTELHO, GLEICE; GRACIA, LOURDES; NOGUEIRA, ICAMIRA COSTA; PINATTI, IVO MATEUS; ROSA, IEDA LUCIA VIANA; LA PORTA, FELIPE DE ALMEIDA; ANDRES, JUAN; LONGO, ELSON. Effects of chemical substitution on the structural and optical properties of alpha-Ag2-2xNixWO4 (0 <= x <= 0.08) solid solutions. Physical Chemistry Chemical Physics, v. 18, n. 31, p. 21966-21975, AUG 31 2016. Web of Science Citations: 7.
PINATTI, IVO M.; NOGUEIRA, ICAMIRA C.; PEREIRA, WYLLAMANNEY S.; PEREIRA, PAULA F. S.; GONCALVES, ROSANA F.; VARELA, JOSE A.; LONGO, ELSON; ROSA, IEDA L. V. Structural and photoluminescence properties of Eu3+ doped alpha-Ag2WO4 synthesized by the green coprecipitation methodology. DALTON TRANSACTIONS, v. 44, n. 40, p. 17673-17685, 2015. Web of Science Citations: 23.

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