Molecularly imprinted magnetite nanomaterials and its application as corrosion inhibitors

Molecularly imprinted (MI) magnetic submicroparticles with iron oxide core and silica shell were used as substrate for immobilization of different functions. The activity toward heavy metals was provided via attachment of ethylene diamine tetra acetate (EDTA) silica coated magnetite nanomaterials; then their use in the immobilization of MI magnetite (Fe3O4/SiO2/Thermosensitive/EDTA-CS) nanomaterials to the silica surface with subsequent chemical grafting of EDTA on which coupling occurred via an chitosan bonding. MI of manmade polymeric materials (Fe3O4/SiO2/Thermosensitive/EDTA nanomaterials) are functionalized by the cross-linking of monomeric molecules as an analyte, which react as a molecular template (Self-assembly process). Covalent binding of CS to the magnetite surface proceeds using a free −CH2OH group of CS and a NH2-group of magnetite with EDTA as a cross-linker. This perspective has been originated by Wulff and his subordinates. MI magnetite (Fe3O4/SiO2/Thermosensitive/EDTA-CS) nanomaterials were characterized by X-ray diffraction spectrometry, scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform-infrared spectroscopy, vibrating sample magnetometry, and dynamic light scattering. The prepared MI magnetite nanomaterials (Fe3O4/SiO2/Thermosensitive/EDTA-CS) were used as corrosion inhibitors.Download : Download full-size imageFigure A. Mechanism of MI magnetite nanomaterials (Fe3O4@SiO2) with Trinitrotoluene (TNT) (Ahmad et al., 2018). Reproduced with permission from Ahmad, I., Siddiqui, W.A., Qadir, S., & Ahmad, T. (2018). Synthesis and characterization of molecular imprinted nanomaterials for the removal of heavy metals from water. Journal of Materials Research and Technology, 7(3), 270–282. Copyright 2021 @ Elsevier. Figure A. Mechanism of MI magnetite nanomaterials (Fe3O4@SiO2) with Trinitrotoluene (TNT) (Ahmad et al., 2018). Reproduced with permission from Ahmad, I., Siddiqui, W.A., Qadir, S., & Ahmad, T. (2018). Synthesis and characterization of molecular imprinted nanomaterials for the removal of heavy metals from water. Journal of Materials Research and Technology, 7(3), 270–282. Copyright 2021 @ Elsevier.