TY - JOUR
T1 - Synthesis and characterization of Co - Hydrotalcite - Like compounds
AU - Hesiquio-Garduño, M.
AU - Zeifert, B.
AU - Salmones, J.
AU - Reza, H.
PY - 2004
Y1 - 2004
N2 - Co-Hydrotalcite-like compounds (Co-HTlcs), as precursors of mixed oxides, were synthesized by coprecipitation technique from Mg(NO3) 2·6H2O, Al(NO3) 3·9H2O and Co(NO3) 2·6H2O, with a constant molar ratio Mg/Al of 1.6 and a variable molar ratio Co/Mg from 0.01 to 0.1. The pH was controlled around 10. It is shown by XRD results, processed with the Winplotr software, that the "c" lattice parameter increases with an increasing of Co/Mg ratio and there is no change on the "a" lattice parameter. This behaviour is discussed and it was attributed to the substitution between the Mg and Co atoms in the hydrotalcite structure. Moreover, the microstructural parameters (crystallite size and strain) were analyzed by XRD, using the Williamson-Hall plot and the Two Stages Approach. It was observed that the crystal perfection is increased as the Co content increases. The morphology and layers size were studied by SEM and it was observed that the particles are stacked and formed by several layers, which causes porosity into the particles.
AB - Co-Hydrotalcite-like compounds (Co-HTlcs), as precursors of mixed oxides, were synthesized by coprecipitation technique from Mg(NO3) 2·6H2O, Al(NO3) 3·9H2O and Co(NO3) 2·6H2O, with a constant molar ratio Mg/Al of 1.6 and a variable molar ratio Co/Mg from 0.01 to 0.1. The pH was controlled around 10. It is shown by XRD results, processed with the Winplotr software, that the "c" lattice parameter increases with an increasing of Co/Mg ratio and there is no change on the "a" lattice parameter. This behaviour is discussed and it was attributed to the substitution between the Mg and Co atoms in the hydrotalcite structure. Moreover, the microstructural parameters (crystallite size and strain) were analyzed by XRD, using the Williamson-Hall plot and the Two Stages Approach. It was observed that the crystal perfection is increased as the Co content increases. The morphology and layers size were studied by SEM and it was observed that the particles are stacked and formed by several layers, which causes porosity into the particles.
KW - Crystallite Size
KW - Hydrotalcite-Like Compounds
KW - Microstrain
KW - Mixed Oxides
UR - http://www.scopus.com/inward/record.url?scp=8644239471&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/JMNM.20-21.257
DO - 10.4028/www.scientific.net/JMNM.20-21.257
M3 - Artículo de la conferencia
AN - SCOPUS:8644239471
SN - 1422-6375
VL - 20-21
SP - 257
EP - 262
JO - Journal of Metastable and Nanocrystalline Materials
JF - Journal of Metastable and Nanocrystalline Materials
T2 - Proceedings of the 10th International Symposium on Metastable Mechanically Alloyed and Nanocrystalline Materials (ISMANAM-2002)
Y2 - 24 August 2003 through 28 August 2003
ER -