Magnetic and Thermodynamic Properties of Nanosized Zn Ferrite with Normal Spinal Structure Synthesized Using a Facile Method

Abstract

Normal spinel zinc ferrite (ZnFe2O4) nanoparticles (NPs) with zero net magnetization were synthesized by a facile coprecipitation method in which two kinds of organic alkali, namely, 1-amino-2-propanol (MIPA) and bis(2-hydroxypropyl)-amine (DIPA), were used. The diameters of the ZnFe2O4 NPs were determined to be about 7 and 9 nm for samples prepared with MIPA and DIPA, respectively, and the normal spinel structure was confirmed by the magnetic property measurement at room temperature and the temperature dependence of the direct current magnetization. These results are different from those reported in the literature, where ZnFe2O4 NPs show a nonzero net magnetization. The heat capacity of the ZnFe2O4 NPs synthesized using DIPA was measured using a physical property measurement system in the temperature range from 2 to 300 K, and the thermodynamic functions were calculated based on the curve fitting of the experimental heat capacity data. The heat capacity of the ZnFe2O4 NPs was compared with that of a nanosized (Zn(0.795)Fe(0.205))[Zn(0.205)Fe(1.795)]O4 material studied in the literature, indicating that the Debye temperature of the present sample is more comparable with that of the bulk ZnFe2O4 reported by Westrum et al.

Improved Electrochemical Performance of a ZnFe2O4 Nanoflake‐Based Supercapacitor Electrode by Using Thiocyanate‐Functionalized Ionic Liquid Electrolytes

“…The observed results were in good agreement with earlier reports, indicating the oxidation state of Fe was +3. Furthermore, the inset in Figure S6 shows the high‐resolution O 1s spectra with binding energy of 530.24 eV resulting from the lattice oxygen (O 2– ) in the prepared ZnFe 2 O 4 thin film 29…”

Engineering of magnetically separable ZnFe2O4@ TiO2 nanofibers for dye-sensitized solar cells and removal of pollutant from water

“…5, two characteristics absorption peaks at about 466 cm −1 and 1100 cm −1 are belongs to Ti-O stretching [33,34]. Furthermore, the absorption peaks at around 550 cm −1 can be assigned to tetrahedral Zn-O bonds while absorption peak at around 415 cm −1 can be associated to octahedral Fe-O bonds [35,36].…”

Effects of synthesis method on cation distribution and optical properties of Co/Cr co-doped MgGa2O4 nanoparticles

“…To overcome the difficulty, several wet chemical synthesis techniques have been developed, including sol-gel method (SG), hydrothermal and co-precipitation (CP), which have the advantage of good chemical homogeneity, high purity and low temperature processing in comparison with solid state reaction [9][10][11][12].…”