Synthesis of nickel zinc ferrite nanoparticle/organic hybrid from metalorganics

Abstract

Ni,Zn)Fe 2 O 4 particle/organic hybrid was synthesized in situ from metalorganics below 100°C. A mixture of nickel (II) acetylacetonate (NA), zinc acetylacetonate (ZA), and iron (III) 3-allylacetylacetonate (IAA) was hydrolyzed and polymerized yielding a spinel oxide particle/organic hybrid. X-ray diffraction analysis revealed that the crystallinity of spinel particles was dependent upon the hydrolysis conditions of NA-ZA-IAA. Nanocrystalline nickel zinc ferrite particles below 5 nm were uniformly dispersed in the organic matrix. The magnetization of hybrid increased with an increasing amount of water for hydrolysis. Nano-sized nickel zinc ferrite particle/organic hybrid showed a magnetization-applied field (BH) curve with no remanence above 40 K. The magnetization versus H/T curves from 40 to 100 K were superimposed on the same curve and satisfied the Langevin equation. The remanent magnetization and coercive field of the hybrid were 7.2 emu/g and 150 Oe, respectively, at 4.2 K. The absorption edge of the hybrid was blue-shifted compared with that of bulk ferrite.

A magnetically recyclable photocatalyst with commendable dye degradation activity at ambient conditions

“…The very weak peak at 400.272 eV may be duely assigned to pyrrolic-N and the high binding energy peak at 401.77 eV is associated with the interaction between N + and protons 38 , 39 . The Nickel 2p 3/2 photoelectron emission spectra line in the composite with binding energy at 855.14 eV corresponds to that of NiO, indicating the Ni ions are divalent and the Zinc 2p 3/2 showed their peaks with typical binding energy at 1021.72 eV and 1044.02 eV associated with ZnO 40 . The observations suggest that the valence state of the Ni, Zn substituting the A sites in the regular spinel structure of NZF is not affected by PANi coating.…”

Catalytic activity of surface‐functionalized nanoscale nickel zinc multiferrites: potential vector for water purification

“…, which shows the existence of Ni, C, O, N, S, Fe and Zn in the spinel ferrite. The strong satellite emission spectral signal of Ni 2p 3/2 in the nanoparticles with binding energy at 854.92 eV demonstrates the presence of Ni 2+ , while Zn 2p 3/2 displays prominent peaks with characteristic binding energies at 1022 and 1044.82 eV . The broader peak of S 2p core lines shows three doublets with principal component S 2p 3/2 located at 163.4, 162.1 and 161.0 eV.…”