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Nanocrystalline metal sulphides obtained by synthesis at the interface of two solvents assisted by microwave

Grant number: 12/22823-6
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): June 01, 2013
Effective date (End): August 31, 2014
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:José Arana Varela
Grantee:Yuri Vinicius Bruschi de Santana
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil

Abstract

Among the nanostructured semiconductors, a class that has been much interest in recent years are the metallic sulphides such as ZnS, CdS, Ag2S and CuS, among others. Particularly, their optical, electrical, and magnetic properties strongly depend on the size of the nanoparticles, their shape and size distribution. In addition, these materials have a wide area of technological applications such as sensors, optical devices, catalysts, photodetectors and are extensively studied in fundamental research. However, for such applications, it is necessary a high degree of accuracy in the synthesis of this compound, in order to obtain: high purity, control over the shape, morphology, and particle formation of a monodisperse system. Therefore, the synthesis of nanoparticles with size distribution and homogeneous morphology is one of the most intriguing challenges of nanotechnology. The search for synthetic methods for low cost, sustainable and exhibiting good control over the structure of materials is intensely investigated by researchers. In this context, this design aims at achieving a new method of synthesizing nanocrystalline sulfides, based on the coupling of two theories already used and successful, the use of microwaves and synthesis at the interface of two solvents. Also be employed experimental techniques and theoretical simulations, in order to provide information about the structural arrangement and electronic systems. Thus, it is intended to prepare a theoretical / experimental about the influence of synthesis parameters on the photocatalytic and luminescent properties of these materials, the latter highly dependent on the structure of the material.

Scientific publications (4)
(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)
SANTANNA, M. A.; MENEZES, W. T.; SANTANA, Y. V. B.; FERRER, M. M.; GOUVEIA, A. F.; FACETO, A. D.; TEREZO, A. J.; OLIVEIRA, A. J. A.; LONGO, E.; FREITAS, R. G.; PEREIRA, E. C. The effect of TiO2 nanotube morphological engineering and ZnS quantum dots on the water splitting reaction: A theoretical and experimental study. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 43, n. 14, p. 6838-6850, APR 5 2018. Web of Science Citations: 3.
DE SANTANA, YURI V. B.; CARDOSO GOMES, JOSE ERNANE; MATOS, LEANDRO; CRUVINEL, GUILHERME HENRIQUE; PERRIN, ANDRE; PERRIN, CHRISTIANE; ANDRES, JUAN; VARELA, JOSE A.; LONGO, ELSON. Silver Molybdate and Silver Tungstate Nanocomposites with Enhanced Photoluminescence. NANOMATERIALS AND NANOTECHNOLOGY, v. 4, AUG 1 2014. Web of Science Citations: 48.
FERRER, MATEUS M.; DE SANTANA, YURI V. B.; RAUBACH, CRISTIANE W.; LA PORTA, FELIPE A.; GOUVEIA, AMANDA F.; LONGO, ELSON; SAMBRANO, JULIO R. Europium doped zinc sulfide: a correlation between experimental and theoretical calculations. Journal of Molecular Modeling, v. 20, n. 8 AUG 2014. Web of Science Citations: 10.
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, 2014. Web of Science Citations: 13.

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