Ceramics-Silikáty 56, (3) 254 - 260 (2012) |
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SYNTHESIS OF MgO, ZnO AND Al2O3 BY SOLID AND SOLUTION COMBUSTION PROCESSES AND STUDY OF THEIR PERFORMANCES IN Co2+ UPTAKE
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Moreno-Marcelino J. E. 1, Granados-Correa F. 2, Pfeiffer H. 2,
Bulbulian S. 3
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1 Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, Col. Escandón,
Delegación Miguel Hidalgo, 11801 México D.F., México
2 Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México,
circuito exterior s/n, Cd. Universitaria, Del. Coyoacan, CP 04510, México D.F, México
3 CCADET, Universidad Nacional Autónoma de México,
circuito exterior s/n, Cd. Universitaria, Del. Coyoacan, CP 04510, México D.F, México
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Keywords: Metallic oxides, Solid-combustion process, X-ray diffraction, Surface properties, Co2+ uptake
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The study discusses the effect of magnesium, zinc and aluminum oxides prepared by the solid and solution-combustion
process. The powders were synthesized by using different urea to metal nitrates ratio and different water concentrations in
the solutions. They were characterized by X-ray diffraction, BET surface area and their performance in Co2+ uptake from
aqueous solutions was studied. Results showed that water addition up to a certain limit during the solution combustion
method modified the textural properties of the different oxides and that powders obtained by this process have interesting
properties, increase the capacity to uptake Co2+ present in water, and increase the surface area of the materials. It was also
found that further increments of water in the solutions decreased the Co2+ uptake capacity of the obtained solids. Results with
Co2+ ions indicate that they are readily related to the solids prepared by solution combustion processes. It was found that that
solution combustion favors cobalt uptake, depending on the amount of water used in the solution. |
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