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Calcium sulfide: morphological and optical properties

Grant number: 10/19484-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2011
Effective date (End): August 31, 2013
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal researcher:Elson Longo da Silva
Grantee:Cristiane Wienke Raubach Ratmann
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil


The sulfides generally have various applications, such as photoluminescence, electro-optics, electroluminescence, photo catalysis, among others. The calcium sulfide (CaS) has interesting properties such as high luminescence, with applications in television screens, lamps, phosphorescence, etc. However, for such applications, it is necessary to consider some factors regarding the formation of this compound, mainly including: high purity, control over the morphology and formation of a monodisperse system. In principle, it is expected that changes in morphology and size of calcium sulfide nanostructures result in improvements in their physical and chemical properties. This fact, which can promote the use of this material to develop new technological applications. Therefore, this work aims to study and analyze the synthesis of nanostructures through the CaS processing method solvothermal assisted by microwaves. These materials will be characterized by X-ray diffraction (XRD), scanning electron microscopy electron gun with field emission (FEG-SEM) and energy dispersive X-ray (EDX). In this project, is also analyzed the formation mechanism of the morphologies of the synthesized materials obtained. (AU)

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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)
RAUBACH, CRISTIANE W.; DE SANTANA, YURI V. B.; FERRER, MATEUS M.; BUZOLIN, PRESCILA G. C.; SAMBRANO, JULIO R.; LONGO, ELSON. Photocatalytic activity of semiconductor sulfide heterostructures. DALTON TRANSACTIONS, v. 42, n. 31, p. 11111-11116, . (10/19484-0)
RAUBACH, CRISTIANE W.; GOUVEIA, AMANDA F.; DE SANTANA, YURI V. B.; VARELA, JOSE A.; FERRER, MATEUS M.; LI, MAXIMO S.; LONGO, ELSON. Towards controlled synthesis and better understanding of blue shift of the CaS crystals. JOURNAL OF MATERIALS CHEMISTRY C, v. 2, n. 15, p. 2743-2750, . (10/19484-0, 12/14468-1, 12/22823-6, 12/07967-1)
RAUBACH, CRISTIANE W.; POLASTRO, LISANIAS; FERRER, MATEUS M.; PERRIN, ANDRE; PERRIN, CHRISTIANE; ALBUQUERQUE, ANDERSON R.; BUZOLIN, PRESCILA G. C.; SAMBRANO, JULIO R.; DE SANTANA, YURI B. V.; VARELA, JOSE A.; et al. Influence of solvent on the morphology and photocatalytic properties of ZnS decorated CeO2 nanoparticles. Journal of Applied Physics, v. 115, n. 21, . (12/17500-3, 10/19484-0)

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