Influence of the method of formation a nanosized CoFe2O4/nontronite composite on its structure and properties
Abstract
The aim of the study was to establish the influence of the method of formation of the CoFe2O4/nontronite nanocomposite on its structure and properties.
Impurity-free nanoparticles of cobalt ferrite CoFe2O4 (XRD), close to spherical in shape, with a predominant particle fraction in the range of 8-20 nm (TEM), were synthesized using the citrate combustion method. The formation of the CoFe2O4/nontronite nanocomposite was carried out by two methods: mechanical mixing of available precursors followed by annealing and combustion of iron-cobalt citrate with the formation of spinel in the presence of nontronite in the reactor.
The CoFe2O4/nontronite nanocomposite formed by the first method is characterized by the decomposition of natural aluminosilicate aggregates and a higher sorption activity with respect to formaldehyde than the original clay mineral and spinel. The second method of composite formation leads to the formation of coarse-grained silica structures with worse sorption activity in comparison with natural aluminosilicate and CoFe2O4.
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