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.
News published in Agência FAPESP Newsletter about the scholarship: