Synthése, caractérisation et activité photo catalytique de l'oxyde de fer non dopé et dopé par voie sol-gel

Abstract

In photocatalysis reactions, semiconductors act as catalysts, and are therefore not consumed in the overall reaction. They are called "photo catalysts". Iron oxides are semiconductors and widely found in nature, appearing in soils, rocks, sediments, the atmosphere, fresh and salt water systems. The objective is to act on the physical and electrochemical properties of the Fe2O3 undoped and doped with SiO2 layer in order to improve the photocatalytic performance. We are investigating in this work the effect of the crystal structure of iron oxide, undoped and doped with SiO2 on their ability to adsorb the methylene blue solution in order to achieve color filters from the photo catalytic process . The main objective of this dissertation is to study the influence of the concentration of the solution on the structural and optical properties of thin layers of Fe2O3 produced by the SolGel method.