Synthesis, characterization, elastic, and electro-magnetic properties of MFe2O4 ferrites (M = Co2+, Ni2+, Cu2+, Mg2+, and Zn2+) via sucrose auto-combustion

Synthesis of polyaniline/spinel ferrites core-shell nanocomposites via sucrose auto-combustion and in situ polymerization

“…The crystallite sizes, L XRD , were evaluated using Scherrer's equation, listed in table 1, which revealed that the largest crystallite size was for CoFe 2 O 4 nanocomposites, and the smallest one was for CuFe 2 O 4 . The average lattice parameter, a, calculated using atomic planes, hkl, and the interlayer spacing, d, summarized in table 1, indicated close agreement to those reported for pure ferrites in our previous work [16]. These results proved the interaction absence between ferrites and the PANI matrix.…”

“…Comparing the obtained of the prepared nanocomposites' FT-IR spectra with that of pure PANI indicated the appearance of two characteristic bands υ 1 and υ 2 could be referred to as the M-O bonds' stretching vibration mode in octahedral and tetrahedral sublattices of spinel ferrites, respectively [26]. Their positions (summarized in table 1) agreed well with those that appeared for pure NiFe 2 O 4 (previously published [16]). The absence of any changes in the bands' positions indicates the absence of any interaction between all ferrites and the PANI matrix.…”

“…The magnetization order resembles that obtained with pure ferrites [16], in which CoFe 2 O 4 has the highest values while ZnFe 2 O 4 has the lowest ones. The obtained coercivity is obviously higher than those of the pure ferrites [16] and indicated hard magnetic characterization for CoFe 2 O 4 and CuFe 2 O 4, while others possess soft ones.…”

“…These data clearly revealed that all ferrites' magnetic features were greatly impacted by the PANI matrix in the nanocomposite structure. Regarding our previously reported magnetic data for all pure ferrites [16], the saturation magnetization and the remanence magnetization were found to be drastically decreased. On the other hand, the coercivity values indicated an apparent increase.…”

“…The effect of ferrites' presence, and their type on the PANI properties, was also debated. The process for the synthesis of magnetic ferrites, MFe 2 O 4 (M = Co 2+ , Cu 2+ , Mg 2+ , Ni 2+ , and Zn 2+ ) involved a mixture of the ferric nitrate as an oxidizing agent and individual metal nitrate, besides the sucrose (fuel) [16].…”