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Nanoporous ferrimagnetic membranes based on maghemite (γ-Fe 2 O 3 ) and cobalt ferrite (Fe 2 CoO 4 ) were prepared by the sol-gel route using colloidal ferrofluids. These membranes were used for the separation of paramagnetic and diamagnetic gaseous species at room temperature. Their magnetic properties were analyzed using a SQUID magnetometer, and their structures...
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