Abstract

RAMOS-RAMIREZ, E. et al. Hydrotalcite-like mesoporous materials obtained by the sol-gel method with microwave radiation and his evaluation as catalists and sorbent. Rev. Mex. Ing. Quím [online]. 2015, vol.14, n.3, pp.711-722. ISSN 1665-2738.

With the purpose of obtaining materials potentially useful in the optimization of catalytic industrial processes and in environmental remediation for the elimination of toxic waste, this work presents the synthesis of hydrotalcite like mesoporous materials by the sol-gel method with microwave irradiation from metallic alcoxides of magnesium and aluminium with relations Mg/Al of 2 and 3. The materials obtained were characterized for the determination of their structural, thermal and textural properties. For the evaluation of the catalytic and adsorption capacities of the materials, these were probed both in the reaction of 2-propanol decomposition, as well as in the removal of chrome (VI) from watery solutions; the above mentioned evaluation shows the potential that they have for their employment in processes of environmental remediation. The catalysts obtained on having thermal treated of hydrotalcite like mesoporous materials to 400°C turned out to be active for the decomposition of 2-propanol giving a greater selectivity to propylene that to propanone, with which the formation of preferably acidic compounds is confirmed. In addition the hydrotalcite like mesoporous materials a showed a good capacity for the removal of chromates from watery solutions with values of 44 and 45mg of chrome the (VI)/g of hydrotalcite like mesoporous materials.

Keywords : hydrotalcite like mesoporous materials; sol-gel method; microwave irradiation; acid hydrotalcite chromium (VI).