Modifying graphene oxide with magnetic nanoparticles and Mg-Al LDHs and its application as an efficient catalyst in organic reactions

Graphene oxide was synthesized and modified with Fe3O4 magnetic nanoparticles, followed by integration of Mg-Al-OH LDHs into the GO matrix through solvothermal method. The formed magnetic Fe3O4@GO@Mg-Al-OH LDHs was then characterized using conventional analytical methods. SEM images showed agglomerated nanoparticles of the monohybrids with an average particle size between 40 and 80 nm. EDX and X-ray mapping confirmed the presence of all expected elements, including carbon, iron, aluminum, and magnesium. Furthermore, VSM analysis demonstrated that the magnetic properties of Fe3O4 was meaningfully dropped in the final nanohybrid, although Fe3O4@GO@Mg-Al-OH LDHs still showed magnetic properties. The role of this nanohybrid as a catalyst was finally examined in the synthesis of isoxazolone and thiophene compounds.