Resumen
Foi realizada a síntese de um catalisador baseado em óxido de ferro magnético promovido com níquel e suportado em sílica. O material foi caracterizado por microscopia eletrônica de varredura com detector de energia dispersiva de raios-X (MEV-EDS) e difratometria de raios-X (DRX). Ele foi testado como catalisador na oxidação do composto orgânico modelo azul de metileno (AM) utilizando o processo foto-Fenton que obteve uma atividade satisfatória para o catalisador de mais 75% de descoloração após 10 minutos de reação.
Palavras-chave: Óxido de Ferro Magnético. Níquel. Sílica. Catálise. Foto-Fenton.
Synthesis of nickel promoted magnetic iron oxide Redox catalyst supported on silica
Abstract
A catalyst based on magnetic iron oxide promoted with nickel and supported on silica was synthesized. The material was characterized by scanning electron microscopy with dispersive X-ray energy detector (SEM-EDS) and X-ray diffractometry (XRD). It was tested as a catalyst in the oxidation of the methylene blue organic compound using Photo-Fenton process in which a satisfactory activity was obtained for the catalyst with over 75% decolorization after 10 minutes of reaction.
Keywords: Magnetic Iron Oxide. Nickel. Silica. Catalysis. Photo-Fenton.
Citas
CORNELL, R. M.; SCHWERTMANN, R. M. The iron oxides: structure, properties, reactions, occurences and uses. 2. ed. Weinheim: Wiley-VCH, 2003.
MAZALEYRAT, F. et al. Silica coated nanoparticles: synthesis, magnetic properties and spin structure. Journal of Alloys Compounds, v. 483, p. 473-478, 2009.
MCFARLAND, E. W.; METIU, H. Catalysis by doped oxides. Chemical Reviews, v. 113, n. 6, p. 4391-427, 2013.
TASKER, S.; STANDLEY, E.; JAMISON, T. Recent advances in nickel homogeneous catalysis. Nature, v. 509, p. 299-309, 2014.