Obtenção de óxidos mistos de cério e ferro pela decomposição térmica de 8-hidroxiquinolinatos para degradação fotocatalítica de propranolol

Abstract

Currently, medication has increasingly been used, and in hance, there’s a boost of inappropriate waste disposal. Nowadays, sewage plants are ineffective for treating these compounds, leading to river and sea contamination, causing health and environment injury. Therefore, it is important to highlight the heterogenic photocatalysis that aims to use capable material to decay these contaminants in few minutes. The material needed, composed with CeO2 despite redox properties, excel mitigation of environment pollutant. Thus, introducing iron in its structure promotes bigger crystalline deformation, causing higher tension in its crystalline network, providing oxygen vacancies, which operates in the contaminant material. Thereby, it is being studied ways to fight these water contaminants through CeO2 based material. So, cerium and iron mixed oxides (solid solutions) – Ce1xFexO2δ, 0 ≤ x ≤ 0,05 – were synthesized by 8hydroxyquinolinat thermic decomposing method despite the type of experimental planning rotational central compound delineation, which calcination temperature varies, such as iron contents. These oxides were characterized aiming to get knowledge of the effects of iron in CeO2 structure. Thermic analysis, XRD, colorimetry, FTIR and SEMEDS tests were made to investigate iron incorporation in CeO2 structure, because the iron used was properly introduced in this structure and crystallite structure has its size reduced, increasing crystalline microstrain structure and oxygen vacancies concentrations. Afterward, mixed oxides were investigated to understand the photocatalytic capacity to deteriorate propranolol hydrochloride. The level of iron sample by 0,73% and calcined at 984,2 ºF showed higher drug degradation (23%), and the 2,50% level of iron sample, calcined at 932 ºF revealed less active drug degradation by the imposed conditions.