Synthesis of Cu_xNi_1−x alloy nanoparticles from double complex salts and investigation of their magnetoimpedance effects

Abstract

In this work, the magnetic Cu x Ni 1-x alloy nanoparticles were obtained from DCSs by a chemical reduction method. In this method magnetic Cu x Ni 1-x alloy nanoparticles were prepared from [Cu(NH 3 ) 4 ][Ni(C 2 O 4 ) 2 ], [Cu(en) 2 ][Ni(C 2 O 4 ) 2 ] and [Cu(py) 4 ][Ni(C 2 O 4 ) 2 ]coordination complexes. Reduction of these complexes was occurred in ethanolic aqueous solution by hydrazine monohydrate. In order to characterization the synthesized compounds, we have used, IR spectroscopy, EDX, SEM and XRD. The magnetic properties of nanoalloys were measured using a Vibrating Sample Magnetometer (VSM). Magnetoimpedance (MI) measurements were performed 10 using a Lock-in Amplifier (7265 Perkin Elmer) at the frequency of 250 kHz. These alloys demonstrate ferromagnetic behaviour which is due to presence of nickel in the alloys. This property makes them as an excellent candidate for technological applications such as magnetic devices or sensors based on MI effect. The powder x-ray diffraction patterns were analyzed by Rietveld method. The analyses carried out with the GSAS software package. The results of the Rietveld refinements show a good agreement between the observed pattern and the calculated values.

Visualizing Ligand-Mediated Bimetallic Nanocrystal Formation Pathways with in Situ Liquid-Phase Transmission Electron Microscopy Synthesis

“…13,14 A critical missing piece to this approach is the capability to synthesize alloyed nanoparticles with arbitrary metal combinations and compositions to target DFT predicted catalytically active alloys. The use of complex ions containing two metal sites as precursors, such as metal-capping ligand complexes, 15−19 double ionic salts, 20,21 and molecular complexes formed by metallophilic interactions, 22 has been shown to encourage formation of bimetallic alloy nanocrystals. 23,24 For instance, heteronuclear metal thiolate complexes were shown to enhance copper alloying with gold in AuCu bimetallic nanoparticles.…”

“…The use of complex ions containing two metal sites as precursors, such as metal-capping ligand complexes, − double ionic salts, , and molecular complexes formed by metallophilic interactions, has been shown to encourage formation of bimetallic alloy nanocrystals. , For instance, heteronuclear metal thiolate complexes were shown to enhance copper alloying with gold in AuCu bimetallic nanoparticles . Metal–ligand complexes have been shown to prevent Ostwald ripening during synthesis of alloyed FeCo bimetallic nanoparticles .…”

Synthesis and investigation of the thermal properties of [Co(NH3)6][Co(C2O4)3]·3H2O and [Ir(NH3)6][Ir(C2O4)3]

“…by changing the ratio of the metals in the initial compound, the ratio of the metals in the resulting nanoalloy can be varied. In addition, mixing metals at the molecular level makes it possible to obtain bimetallic nanosystems at low decomposition temperatures and, in many cases, synthesize metastable multi-metal systems that cannot be obtained by mixing two starting compounds containing the required metals and calcining them under the same conditions (Filatov et al, 2020;Kahani & Shahrokh, 2015;Zadesenets et al, 2018Zadesenets et al, , 2019Korenev et al, 2003).…”

“…The choice of ammonia and oxalate as the ligand environment is because of the reducing ability of both ligands, which increases the probability of obtaining metallic solid solutions, and because the thermal decomposition of complex salts containing the oxalate anion proceeds at low temperatures (below 400 C) (Yusenko et al, 2019). It is also worth noting that the decomposition of these ligands does not form by-products that contaminate the target nanoalloy (Kahani & Shahrokh, 2015;Prodius et al, 2020;Verma et al, 2019).…”

Synthesis and Study of Catalytic, Anti–Bacterial, Anti–Oxidant, and DNA Cleavage Properties of Ag–Co and Ag–Ni Magnetic Nanoparticles

“…36 During the reduction process, if primary elements have different reduction properties they will form a core shell structure, otherwise this reaction will lead to a bimetallic nanoalloy generation. 37 Along this line and in continuation of our ongoing research on the synthesis and applications of nanocatalysts and nanoalloys, 38,39 we were prompted to explore the efficacy of Ag-Co and Ag-Ni magnetic nanoalloys as heterogeneous catalysts for the synthesis of 1,8-dioxooctahydroxanthenes. Also, the biological activities of these nanoalloys were studied.…”