Preparation and characterization of Cu–Co alloy nanoparticles from double complex salts by chemical reduction

Abstract

Magnetic Cu-Co alloy nanoparticles have been prepared by a chemical reduction method of double complex salts (DCSs). In this method Cu-Co alloy nanoparticles have been prepared from [Co(NH 3 ) 6 ] 2 [Cu(C 2 O 4 ) 2 ] 3 (DCS1), [Co(NH 3 ) 5 Cl][Cu(C 2 O 4 ) 2 ] (DCS2) and [Co(en) 3 ] 2 [Cu(C 2 O 4 ) 2 ] 3 (DCS3) coordination complexes. Reduction of these complexes occurred in ethanolic aqueous solution by hydrazine monohydrate. In order to characterize the synthesized compounds we have used XRD, EDX, SEM and IR spectroscopy. Magneticproperties and giant magnetoimpedance are investigated in Cu-Co nanoalloys. These alloys demonstrate ferromagnetic behavior, which is due to presence of Co in the alloys. This property makes them an excellent candidate for technological applications such as magnetic devices or sensors based on a magnetoimpedance effect. The relative phase abundances of Cu and Co were carried out with the GSAS software. 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 .…”

One-pot rapid preparation of carbon-coated Co–Cu alloy composites via the gaseous detonation method

“…Figure 2 shows the phase composition analysis, and three sharp diffraction peaks in S1 and S2 can be found. The diffraction peaks at 43.69, 50.98, and 74.68° are assigned to Co 0.52 Cu 0.48 (PDF#50-1452) (111), (200), and (220), respectively [12], which indicates the Co-Cu alloy was prepared by the gaseous detonation method. The crystallite size of the Co-Cu alloy was calculated by the Scherrer equation [13] 1.…”

Investigating the Effect of CuO/NiO and CuO/CoO Relative Composition on the Reduction Time of (CuO)x-(NiO)(1-x) and (CuO)x-(Co3O4)(1-x) with Methane Gas as the Reducing Agent in the Synthesis of Nano-bimetallic Nix-Cu(1-x) and Cux-Co(1-x)

“…Copper-nickel and copper-cobalt binary nanoparticles (BNPs) are consisted of copper and nickel and cobalt and copper metals, respectively, which provide many applications in different fields, compared to single-metal copper, nickel and cobalt nanoparticles, due to the composition of different percentages, varied particle sizes and the coexistent properties of both metals (copper and nickel or copper and cobalt) [7][8][9][10][11]. Nickel is completely mixed with copper and the resulting alloy only contains one phase in any ratio.…”