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Influence of temperature on the photocatalytic properties of nanostructured films of Fe2O3.

Grant number: 11/19390-8
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2011
Effective date (End): December 31, 2012
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal researcher:Flavio Leandro de Souza
Grantee:Lucas Costa de Castro Ferraz
Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil


Iron oxide used as photoanodes in photoeletrochemical cells (PECs) to generate hydrogen have been intensively studied in the last years. Thus, a significant number of research groups have been chasing new strategies to obtain nanostructures of different morphologies in order to acquire more efficient photoeletrochemical devices. In this research project, vertically aligned iron oxide nanorods onto transparent conductive glass substrates will be prepared by hydrothermal method originally known as Purpose Built Material (PBM), recently modified by our group with great success. The main focus of this work will study the influence of time and temperature on thermal treatment process of developed nanostructures in order to reach its adequate phase and functional properties. Nanostructured film submitted at different time and temperature of heat treatment will be accompanied by analyzing their structural, morphological and electrochemical properties. Besides, the applications of those films on PECs will be done. In recent studies, our group found out that annealing films with the temperature of 390° for 1 hour was not sufficient to reach the pure hematite phase (± -Fe2O3). It is well known in the literature that this material has catalytic properties. Therefore, these studies will be of fundamental importance and relevance in our project of optimization and reaching of better efficiency results of photoeletrochemical cells.

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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)
FERRAZ, LUCAS C. C.; CARVALHO, JR., WALDEMIR M.; CRIADO, DENISE; SOUZA, FLAVIO L. Vertically Oriented Iron Oxide Films Produced by Hydrothermal Process: Effect of Thermal Treatment on the Physical Chemical Properties. ACS APPLIED MATERIALS & INTERFACES, v. 4, n. 10, p. 5515-5523, OCT 2012. Web of Science Citations: 31.

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