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Catalytic activity of the TiO2 nanotube in the water splitting process

Grant number: 17/07240-8
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): June 01, 2017
Effective date (End): October 31, 2017
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Elson Longo da Silva
Grantee:Amanda Fernandes Gouveia
Supervisor abroad: Juan Manoel Andres Bort
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Local de pesquisa : Universitat Jaume I, Spain  
Associated to the scholarship:13/26671-9 - Theoretical and experimental study of multifunctional semiconductors, BP.DR

Abstract

Semiconductors are solid capable of changing their conductivity, passing to an insulator or to a conductor, according to external factors such as temperature. Titanium dioxide, TiO2, is a multifunctional semiconductor, which has been used in several areas, for example: ceramics, cosmetics, and catalysts. One of the important factors to the great diversity of properties and applications of this material is due to the facility in the molding of its structural characteristics and, consequently, electronic, as observed in the vast diversity of published works.Results previously obtained (process number FAPESP 2013/26671-9) showed that was possible the synthesis of TiO2 nanotubes without secondary phases and also showed which surfaces are more stable for TiO2 in the anatase phase. These results generated information that may be very useful for the explanation of phenomena in areas related to the study of catalytic, sensory and luminescent properties.From this study of the surfaces will be carried out calculations of adsorption and water splitting on the most stable surfaces in order to study and create a mechanism to explain the hydrolysis that occurs on the surfaces of this semiconductor.The main objective of this internship abroad in the Theoretical and Computational Chemistry Group of University Jaume I is to learn how to use new computational tools and to be in contact with researchers that have a huge experience in the computational chemistry field in order to generate satisfactory contributions to the process of water splitting that occurs on the surfaces of TiO2 nanotubes. Therefore, will be performed searches of superficial active site in the study of the bulk and in the nanotubes.The theoretical simulations, which will be developed to these materials, involve the creation of optimized models that contain information of experimental samples synthesized in the project cited above. From these optimized models, it can be made detailed studies of the structure and its properties of TiO2.

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)
ANDRES, JUAN; GOUVEIA, AMANDA FERNANDES; GRACIA, LOURDES; LONGO, ELSON; MANZEPPI FACCIN, GIOVANI; DA SILVA, EDISON ZACARIAS; PEREIRA, DOUGLAS HENRIQUE; SAN-MIGUEL, MIGUEL ANGEL. Formation of Ag nanoparticles under electron beam irradiation: Atomistic origins from first-principles calculations. International Journal of Quantum Chemistry, v. 118, n. 9, SI MAY 5 2018. Web of Science Citations: 4.
MACEDO, NADIA G.; GOUVEIA, AMANDA F.; ROCA, ROMAN A.; ASSIS, MARCELO; GRACIA, LOURDES; ANDRES, JUAN; LEITE, EDSON R.; LONGO, ELSON. Surfactant-Mediated Morphology and Photocatalytic Activity of alpha-Ag2WO4 Material. Journal of Physical Chemistry C, v. 122, n. 15, p. 8667-8679, APR 19 2018. Web of Science Citations: 10.
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: 18.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.