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Preparación y caracterización de óxidos mixtos nanoestructurados soportados sobre MgO

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Author(s): Claudio Lugo | Edder Garcia | Jairo Rondón | Hildemaro Melendez | Patricia Pérez | Héctor Del Castillo

Journal: Avances en Química
ISSN 1856-5301

Volume: 5;
Issue: 1;
Start page: 37;
Date: 2010;
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Keywords: nanoparticles | oxides mixed | MgO

ABSTRACT
Mixed oxide catalysts of Co, Ni, Cu and Mn supported on MgO were synthesized using two different methods to obtain nanoparticles: the combustion method with urea and the sol-gel modified with citric acid. Different techniques were used to determine their physicochemical properties. X-ray diffraction (XRD), the N2 physisorption by BET method, the temperature programmed reduction (TPR-H2), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX). The results show particle sizes between 5 and 31nm in diameter for solid preparations. Co and Mn show changes in their oxidation states.
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