Characterization of Ternary CuNiCo Metallic Nanoparticles Produced by Hydrogen Reduction
Different methods of producing nanostructured materials at the laboratory scale have been studied using a variety of physical and chemical techniques, though the challenge here is the homogeneous distribution of the elements which also depends on the precursor elements. This work thus focused on the...
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MDPI AG
2021-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/20/6006 |
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| author | Eliana Paola Marín Castaño José Brant de Campos Ivan Guillermo Solórzano-Naranjo Eduardo de Albuquerque Brocchi |
| author_facet | Eliana Paola Marín Castaño José Brant de Campos Ivan Guillermo Solórzano-Naranjo Eduardo de Albuquerque Brocchi |
| author_sort | Eliana Paola Marín Castaño |
| collection | DOAJ |
| description | Different methods of producing nanostructured materials at the laboratory scale have been studied using a variety of physical and chemical techniques, though the challenge here is the homogeneous distribution of the elements which also depends on the precursor elements. This work thus focused on the micro-analytical characterization of Cu–Ni–Co metallic nanoparticles produced by an alternative chemical route aiming to produce solid solution nanoparticles. This method was based on two steps: the co-formation of oxides by nitrates’ decomposition followed by their hydrogen reduction. Based on the initial composition of precursor nitrates, three homogeneous ternaries of the Ni, Cu and Co final alloy products were pre-established. Thus, the compositions in %wt of the synthesized alloy particles studied in this work are 24Cu–64Ni–12Co, 12Cu–64Ni–24Co and 10Cu–80Ni–10Co. Both precursor oxides and metallic powders were characterized by means of X-ray powder diffraction (XRD), scanning electron microscopy (SEM/EDS) and transmission electron microscopy (TEM). The results show that the synthesis procedure was successful since it produced a homogeneous material distributed in different particle sizes depending on the temperature applied in the reducing process. The final composition of the metallic product was consistent with what was theoretically expected. Resulting from reduction at the lower temperature of 300 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>°</mo></msup></semantics></math></inline-formula>C, the main powder product consisted of particles with a spheroidal and eventually facetted morphology of 50 nm on average, which shared the same FCC crystal structure. Particles smaller than 100 nm in the Cu–Ni–Co alloy agglomerates were also observed. At a higher reduction temperature, the ternary powder developed robust particles of 1 micron in size, which are, in fact, the result of the coarsening of several nanoparticles. |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T06:25:39Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-1d0416338e3649b293713c4fbd11587a2023-11-22T18:57:28ZengMDPI AGMaterials1996-19442021-10-011420600610.3390/ma14206006Characterization of Ternary CuNiCo Metallic Nanoparticles Produced by Hydrogen ReductionEliana Paola Marín Castaño0José Brant de Campos1Ivan Guillermo Solórzano-Naranjo2Eduardo de Albuquerque Brocchi3Department of Chemical Engineering and Materials Science, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22453-900, BrazilDepartment of Mechanical Engineering, Rio de Janeiro State University, Rio de Janeiro 20559-900, BrazilDepartment of Chemical Engineering and Materials Science, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22453-900, BrazilDepartment of Chemical Engineering and Materials Science, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22453-900, BrazilDifferent methods of producing nanostructured materials at the laboratory scale have been studied using a variety of physical and chemical techniques, though the challenge here is the homogeneous distribution of the elements which also depends on the precursor elements. This work thus focused on the micro-analytical characterization of Cu–Ni–Co metallic nanoparticles produced by an alternative chemical route aiming to produce solid solution nanoparticles. This method was based on two steps: the co-formation of oxides by nitrates’ decomposition followed by their hydrogen reduction. Based on the initial composition of precursor nitrates, three homogeneous ternaries of the Ni, Cu and Co final alloy products were pre-established. Thus, the compositions in %wt of the synthesized alloy particles studied in this work are 24Cu–64Ni–12Co, 12Cu–64Ni–24Co and 10Cu–80Ni–10Co. Both precursor oxides and metallic powders were characterized by means of X-ray powder diffraction (XRD), scanning electron microscopy (SEM/EDS) and transmission electron microscopy (TEM). The results show that the synthesis procedure was successful since it produced a homogeneous material distributed in different particle sizes depending on the temperature applied in the reducing process. The final composition of the metallic product was consistent with what was theoretically expected. Resulting from reduction at the lower temperature of 300 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>°</mo></msup></semantics></math></inline-formula>C, the main powder product consisted of particles with a spheroidal and eventually facetted morphology of 50 nm on average, which shared the same FCC crystal structure. Particles smaller than 100 nm in the Cu–Ni–Co alloy agglomerates were also observed. At a higher reduction temperature, the ternary powder developed robust particles of 1 micron in size, which are, in fact, the result of the coarsening of several nanoparticles.https://www.mdpi.com/1996-1944/14/20/6006Cu–Ni–Co alloycharacterizationhydrogen reductionnanoparticles |
| spellingShingle | Eliana Paola Marín Castaño José Brant de Campos Ivan Guillermo Solórzano-Naranjo Eduardo de Albuquerque Brocchi Characterization of Ternary CuNiCo Metallic Nanoparticles Produced by Hydrogen Reduction Materials Cu–Ni–Co alloy characterization hydrogen reduction nanoparticles |
| title | Characterization of Ternary CuNiCo Metallic Nanoparticles Produced by Hydrogen Reduction |
| title_full | Characterization of Ternary CuNiCo Metallic Nanoparticles Produced by Hydrogen Reduction |
| title_fullStr | Characterization of Ternary CuNiCo Metallic Nanoparticles Produced by Hydrogen Reduction |
| title_full_unstemmed | Characterization of Ternary CuNiCo Metallic Nanoparticles Produced by Hydrogen Reduction |
| title_short | Characterization of Ternary CuNiCo Metallic Nanoparticles Produced by Hydrogen Reduction |
| title_sort | characterization of ternary cunico metallic nanoparticles produced by hydrogen reduction |
| topic | Cu–Ni–Co alloy characterization hydrogen reduction nanoparticles |
| url | https://www.mdpi.com/1996-1944/14/20/6006 |
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