Edta-Grafted Cu2+-Doped Superparamagnetic Nanoparticles: Facile Novel Synthesis and Their Structural and Magnetic Characterizations Publisher



Aghazadeh M¹ ; Karimzadeh I² ; Ganjali MR^{3, 4} ; Gharailou D³ ; Hamad SM⁵
Source: Applied Physics A: Materials Science and Processing Published:2019

Abstract

In this work, ethylenediaminetetraacetic acid (EDTA) surface grafting and copper(II) doping of superparamagnetic iron oxide nanoparticles (EDTA/Cu-SPIONs) were simultaneously performed during their formation by a simple electrochemical procedure. This method was achieved by applying a constant current of 10 mA/cm2 to the two-electrode electrochemical cell containing aqueous electrolyte of iron(II) chloride (0.75 g), iron(III) nitrate (2 g), copper(II)chloride (0.5 g) and 0.2 g EDTA. The prepared EDTA/Cu-SPION samples are specified by TEM, VSM, IR, EDS, FE-SEM, TGA and XRD analyses. The magnetite (i.e., Fe3O4) crystal structure (verified by the XRD results), 10 nm particle size (proved by TEM observations), 11 wt% doped copper (revealed though EDS data), and 10 wt% surface coat (calculated from the thermogravimetric data) were specified for the deposited SPION powder. IR data showed all the absorptions related to the chemical bonds (i.e., C–C, C–N, N–H, C–O) of EDTA and proved the EDTA-grafted configuration of the deposited SPIONs. VSM measurements exhibited the superparamagnetic behavior of the EDTA-grafted EDTA/Cu-SPION sample, where relative high saturation magnetization (Ms = 31.38 emu g−1), low remanence (Mr = 0.31 emu g−1) and negligible coercivity (Hci = 6.6 Oe) were observed. Based on the results, the developed route is introduced as a facile procedure for the preparation of EDTA-grafted metal ion-doped magnetite fine particles. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.