Reactivity in the Solid State Between Cobalt and A

Authors: M Kassem

Publish Date: 2010/08/03

Volume: 31, Issue: 5, Pages: 433-438

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Abstract

The reactivity of aluminum molybdate with cobalt was studied Pure materials have been synthesized by the solid state method using Al2O3 and MoO3 in proportional quantities The product then mixed with different quantities of Cobalt in molar ratio Co/Al2MoO43 = 01 0203 04 05 06 08 and 1 The pure initial and resultant materials were characterized using powder xray diffraction Fourier transform IR FTIR differential thermal analysis DTA and nitrogen adsorption The results suggest that Co when mixed at fixed temperature with Al2MoO43 in the solid state does not remain inert This statement is based on the absence of any detectable free cobalt in any sample by the techniques which were employed Two other phases CoMoO4 and MoO2 appear gradually besides the original phase with increasing the molar ratio The CoMoO4 starts to appear overall the used molar ratio range while MoO2 shows up only for molar ratio higher than 06 The appearance of these two phases detected by xray diffraction has also been confirmed by FTIR and DTA measurements The reactivity of cobalt towards aluminum molybdate is manifested also by the modification of the adsorption isotherm and pore size distribution where a mesoporosity has been clearly shown for samples containing molar ratio higher than 06The author would like to thank Professor I Othman General Director of the Atomic Energy Commission of Syria as well as Dr T Yassin Head of Chemistry Department for their support Thanks are also to Dr S Alkhawaja for the valuable discussion Ms H Alsawaf and Mr H Harmalani for the technical helps 0000045/02

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