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Mesoporous silica films with controlled porosity were utilized as the host matrices to prepare FeCo–SiO 2 nanocomposites through an impregnation process. The mesoporous silica films were first impregnated with a solution containing Co(II) and Fe(III) ions and then submitted to a reduction treatment under H 2 flow. FeCo nanocrystals growth took place inside the mesopores, and their...
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