Abstract
A one-step ultrasonication technique for the preparation of magnetic metal (oxide) organic frameworks (MOFs) with a size of >135 nm based on sodium alginate crosslinked with Ca2+ ions and maghemite (γ-Fe2O3) nanoparticles with sizes from 7 to 20 nm was proposed. The MOFs were characterized by Mossbauer spectroscopy, TEM, magnetometry, and UV-VIS and IR spectroscopy. The grid (crosslinks) preliminarily formed by Ca2+ ions plays an important role in the stabilization of maghemite nanoparticles, and the resulting MOFs can be used as magnetic carriers in systems for hyperthermia and drug delivery.
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