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J Environ Sci Health A Tox Hazard Subst Environ Eng

Title:		Chemical-physical properties of spinel CoMn2O4 nano-powders and catalytic activity in the 2-propanol and toluene combustion: Effect of the preparation method
Author(s):		Hosseini SA; Salari D; Niaei A; Deganello F; Pantaleo G; Hojati P;
Address:		"Department of Applied Chemistry and Chemical Engineering, Faculty of Chemistry, University of Tabriz, Tabriz, Iran. s_ali_hosseini@yahoo.com"
Journal Title:		J Environ Sci Health A Tox Hazard Subst Environ Eng
Year:		2011
Volume:		46
Issue:		3
Page Number:		291 - 297
DOI:		10.1080/10934529.2011.539093
ISSN/ISBN:		1532-4117 (Electronic) 1093-4529 (Linking)
Abstract:		"Spinel-type CoMn(2)O(4)nano-powders are prepared using sol-gel auto combustion (SGC) and co-precipitation (CP) methods and their catalytic activities are evaluated in combustion of 2-propanol and toluene. The chemical-physical properties of the oxides are characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), N(2)-adsorption-desorption, temperature programmed reduction (TPR) and scanning electron microscopy (SEM). After calcination at 700 degrees C, CoMn(2)O(4)-SGC shows higher amounts of the normal-type spinel phase and is more crystalline than CoMn(2)O(4)-CP. Higher calcination temperatures (850 degrees C) do not affect very much the weight percentage of the normal-type spinel phase; although the crystal size slightly increased. The TPR analysis evidences a large number of Mn(3+) cations in CoMn(2)O(4)-SGC compared to CoMn(2)O(4)-CP. This difference, together with the higher surface area, could justify the higher activity of CoMn(2)O(4)-SGC in both the investigated reactions"
Keywords:		"2-Propanol/*chemistry Air Pollutants/*chemistry Aluminum Oxide/*chemistry Catalysis Chemical Precipitation Cobalt/*chemistry Magnesium Oxide/*chemistry Manganese Compounds/*chemistry Microscopy, Electron, Scanning Nanostructures/*chemistry Phase Transitio;"
Notes:		"MedlineHosseini, Seyed Ali Salari, Dariush Niaei, Aligholi Deganello, Francesca Pantaleo, Giuseppe Hojati, Pejman eng Research Support, Non-U.S. Gov't England 2011/02/11 J Environ Sci Health A Tox Hazard Subst Environ Eng. 2011; 46(3):291-7. doi: 10.1080/10934529.2011.539093"