Síntese e caracterização de nanopartículas de óxido de ferro suportadas em matriz carbonácea: remoção do corante orgânico azul de metileno em água Synthesis and characterization of iron oxide nanoparticles supported on carbon matrix: oxidation of the dye methylene blue in water

• Main Authors: Maraísa Gonçalves, Cínthia Soares de Castro, Luiz C. A. Oliveira, Mário César Guerreiro
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2009-01-01
• Series: Química Nova
• Subjects: iron oxide; oxidation; nanoparticules
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422009000700008

<abstract language="eng">In this work were prepared composites of iron oxide and carbonaceous materials in two different weight proportions (Carbon/Fe 1/1 and 1/2). The physico-chemical properties of the composites were determined by temperature programmed reduction (TPR), adsorption/dessorption of N2, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and pulse titration H2. The XRD and XPS analysis showed a cubic iron oxide phase, identified as maghemite, formed over the carbon surface. The particle size of maghemite showed to be within 10-30 nm. Carbon/Fe 1/2 was the most active in MB removal kinetics and ESI-MS studies showed that MB removal by both composites leads to oxidized intermediates.