Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/15108
Title: Rota sintética para produção de óxidos de ferro utilizando pectina como agente direcionador em meio não aquoso
Authors: Guerreiro, Mário César
Carvalho, Iara do Rosario Guimarães
Sales, Priscila Ferreira de
Keywords: Óxidos de ferro - Produção
Síntese em meio orgânico
Solvente glicerol
Foto-Fenton
Pectina
Iron oxides - Production
Synthesis in organic medium
Pectin
Solvent glycerol
Photo-Fenton
Issue Date: 8-Aug-2017
Publisher: Universidade Federal de Lavras
Citation: MEDEIROS, A. F. de. Rota sintética para produção de óxidos de ferro utilizando pectina como agente direcionador em meio não aquoso. 2017. 51 p. Dissertação (Mestrado em Agroquímica)-Universidade Federal de Lavras, Lavras, 2017.
Abstract: Several methodologies for the synthesis of iron oxide particles in nonaqueous medium have been studied in recent years, since they have an excellent control over the size and shape of the particles, as well as crystallinity, purity, etc. In this context, the new synthesis method proposed in this dissertation aims to produce iron oxides in non-aqueous medium from reagents from industrial residues such as citrus pectin and glycerol. In addition, through the insertion of different copper contents in the materials, we sought to identify the influence of this metal in the formation of oxides phases, which were characterized by infrared vibration spectroscopy, X-ray diffraction, thermogravimetric analysis, X-ray fluorescence and vibrating sample magnetometry. In addition, the degree of pectin esterification was analyzed by a potentiometric titration, this determination being important to evaluate the interactions of this polysaccharide with the copper and iron metals. The association of these techniques evidenced the presence of the hematite and maghemite phases in different proportions for each material. When tested in photo-Fenton reactions, the materials containing copper in the structure showed better degradability of the blue methylene compound, since this metal plays a very important role for photocatalysis reactions.
URI: http://repositorio.ufla.br/jspui/handle/1/15108
Appears in Collections:Agroquímica - Mestrado (Dissertações)



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