Síntesis de materiales adsorbentes y fotocatalíticos para la remoción de contaminantes en sistemas acuosos

Abstract

Abstract: Contaminants present in aqueous systems represent a serious environmental problem. Adsorption and photocatalysis are interesting techniques in environmental remediation, due to their high efficiency. The objective of this research work is the synthesis of the photocatalysts of TiO2, ZnO, ZnO- TiO2, ZnTiO3 by the sol-gel method, and FAU zeolite from Ecuadorian clays by the hydrothermal method. The characterization was carried out by FRX and DRX, which confirmed the mineralogical composition and characteristic crystalline structure of the synthesized materials. The ability to remove colorants, was performed by reviewing the photocatalytic applications of the synthesized materials in the literature. From the bibliographic compilation it can be deduced that the hybrid photocatalyst ZnO- TiO2 has the highest activity, followed by the mixed oxide TiO2 /ZnTiO3; and the TiO2 and ZnO semiconductors also present good photocatalytic properties in the removal of contaminants; the combination of the two allows to form mixed oxides with vast advantages over oxides alone. Regarding the adsorbent capacity of the FAU zeolite, in the literature it was found that this zeolite is suitable for removing dyes in aqueous systems.