Synthesis, thermal stability, magnetic properties, and microwave absorption applications of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio
Magnetic alloy-C core-shell nanoparticles with tunable elemental components are highly expected for their controllable magnetic, catalytic, and electromagnetic properties, and high air stability. Here we present a simple one-step metal organic chemical vapor deposition for the synthesis of CoNi-C co...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-03-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379721000735 |
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| author | Lizhen Hou Xing Zhen Linlin Liu Daitao Kuang Yangyang Gao Heng Luo Lianwen Deng Chuansheng Chen Shiliang Wang |
| author_facet | Lizhen Hou Xing Zhen Linlin Liu Daitao Kuang Yangyang Gao Heng Luo Lianwen Deng Chuansheng Chen Shiliang Wang |
| author_sort | Lizhen Hou |
| collection | DOAJ |
| description | Magnetic alloy-C core-shell nanoparticles with tunable elemental components are highly expected for their controllable magnetic, catalytic, and electromagnetic properties, and high air stability. Here we present a simple one-step metal organic chemical vapor deposition for the synthesis of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio. The as-synthesized nanoparticles have core sizes of 5–50 nm, shell thicknesses of ~5 nm, and tunable Co/Ni molar ratio determined by the molar ratio of Co(acac)3/Ni(acac)2 used in the precursor. The core-shell nanoparticles are very stable in ambient atmosphere at the temperature below 200 °C, and exhibit a slight oxidation in the temperature range of 200–400 °C. The core-shell nanoparticles with Co/Ni molar ratios of 1.27:1, 0.64:1, and 0.30:1 exhibit saturation magnetization values of 41, 31, and 24 emu/g, and coercivity values of 483, 346, and 362 Oe, respectively. It is demonstrated that the microwave absorption parameters of the as-synthesized nanoparticles can be tuned by the Co/Ni molar ratio, which provides a practical strategy to regulate the microwave absorption properties of nanostructured absorbers. |
| first_indexed | 2024-12-14T17:14:08Z |
| format | Article |
| id | doaj.art-717e8882c58b460abd204f89d67a763a |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-14T17:14:08Z |
| publishDate | 2021-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-717e8882c58b460abd204f89d67a763a2022-12-21T22:53:28ZengElsevierResults in Physics2211-37972021-03-0122103893Synthesis, thermal stability, magnetic properties, and microwave absorption applications of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratioLizhen Hou0Xing Zhen1Linlin Liu2Daitao Kuang3Yangyang Gao4Heng Luo5Lianwen Deng6Chuansheng Chen7Shiliang Wang8School of Physics and Electronics, Hunan Normal University, Changsha 410081, ChinaSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, ChinaSchool of Physics and Electronics, Central South University, Changsha 410083, ChinaSchool of Physics and Electronics, Central South University, Changsha 410083, ChinaSchool of Physics and Electronics, Hunan Normal University, Changsha 410081, ChinaSchool of Physics and Electronics, Central South University, Changsha 410083, ChinaSchool of Physics and Electronics, Central South University, Changsha 410083, ChinaCollege of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaSchool of Physics and Electronics, Central South University, Changsha 410083, China; Corresponding author.Magnetic alloy-C core-shell nanoparticles with tunable elemental components are highly expected for their controllable magnetic, catalytic, and electromagnetic properties, and high air stability. Here we present a simple one-step metal organic chemical vapor deposition for the synthesis of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio. The as-synthesized nanoparticles have core sizes of 5–50 nm, shell thicknesses of ~5 nm, and tunable Co/Ni molar ratio determined by the molar ratio of Co(acac)3/Ni(acac)2 used in the precursor. The core-shell nanoparticles are very stable in ambient atmosphere at the temperature below 200 °C, and exhibit a slight oxidation in the temperature range of 200–400 °C. The core-shell nanoparticles with Co/Ni molar ratios of 1.27:1, 0.64:1, and 0.30:1 exhibit saturation magnetization values of 41, 31, and 24 emu/g, and coercivity values of 483, 346, and 362 Oe, respectively. It is demonstrated that the microwave absorption parameters of the as-synthesized nanoparticles can be tuned by the Co/Ni molar ratio, which provides a practical strategy to regulate the microwave absorption properties of nanostructured absorbers.http://www.sciencedirect.com/science/article/pii/S2211379721000735Core-shell nanoparticlesMetal organic chemical vapor depositionThermal stabilityMagnetic propertyMagnetic alloy |
| spellingShingle | Lizhen Hou Xing Zhen Linlin Liu Daitao Kuang Yangyang Gao Heng Luo Lianwen Deng Chuansheng Chen Shiliang Wang Synthesis, thermal stability, magnetic properties, and microwave absorption applications of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio Results in Physics Core-shell nanoparticles Metal organic chemical vapor deposition Thermal stability Magnetic property Magnetic alloy |
| title | Synthesis, thermal stability, magnetic properties, and microwave absorption applications of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio |
| title_full | Synthesis, thermal stability, magnetic properties, and microwave absorption applications of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio |
| title_fullStr | Synthesis, thermal stability, magnetic properties, and microwave absorption applications of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio |
| title_full_unstemmed | Synthesis, thermal stability, magnetic properties, and microwave absorption applications of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio |
| title_short | Synthesis, thermal stability, magnetic properties, and microwave absorption applications of CoNi-C core-shell nanoparticles with tunable Co/Ni molar ratio |
| title_sort | synthesis thermal stability magnetic properties and microwave absorption applications of coni c core shell nanoparticles with tunable co ni molar ratio |
| topic | Core-shell nanoparticles Metal organic chemical vapor deposition Thermal stability Magnetic property Magnetic alloy |
| url | http://www.sciencedirect.com/science/article/pii/S2211379721000735 |
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