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| Synthesis, magnetic and microwave absorption properties of extremely Ni-C core-shell nanoparticles |
| KUANG Daitao1, WEN Xiang2, LIANG Bingbing1, HOU Lizhen2, MA Songshan1, WANG Shiliang1 |
1. School of Physics and Electronics, Central South University, Changsha 410081, China;
2. School of Physics and Information Science, Hunan Normal University, Changsha 410081, China |
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Abstract Ultra-small Ni-C core-shell nanoparticles were synthesized by the metal organic chemical vapor deposition (MOCVD) using Ni(acac)2 as precursor. The structure and magnetic properties of the as-synthesized nanoparticles were characterized by XRD, Raman spectroscopy, TEM and Physical Property Measurement System respectively. The Ni nanocores have an average diameter of 13 nm, and are encapsulated by C shells with the thickness of 1-3 nm. The Ni-C core-shell nanoparticles have a saturation magnetic moment of 24.5 emu/g, coercivity of 65.5 Oe which is much smaller than the corresponding values of bulk Ni and Ni-C core-shell nanoparticles which are 20 nm in diameters. In the microwave absorption tests, a low reflection loss (RL) of -48.7 dB and a large effective bandwidth (frequency range for RL≤-10 dB) of 7.4 GHz are obtained from the composites of small Ni-C core-shell nanoparticles and paraffin. This suggests that the as-synthesized ultra-small Co-C core-shell nanoparticles have a high potential as the microwave- absorbing materials.
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Received: 20 April 2017
Published: 12 July 2019
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[1] WANG H, GUO H H, DAI Y Y, et al.Optimal electromagnetic- wave absorption by enhanced dipole polarization in Ni/C nanocapsules[J]. Applied Physics Letters, 2012, 101(8): 083116.
[2] ZHANG D F, HAO Z F, ZENG B, et al.Theoretical calculation and experiment of microwave electromagnetic property of Ni(C) nanocapsules[J]. Chinese Physics B, 2016, 25(4): 040201.
[3] LIU W, SHAO Q, JI G, et al.Metal-organic-frameworks derived porous carbon-wrapped Ni composites with optimized impedance matching as excellent lightweight electromagnetic wave absorber[J]. Chemical Engineering Journal, 2017, 313: 734-744.
[4] CHEN T T, DENG F, ZHU J, et al.Hexagonal and cubic Ni nanocrystals grown on graphene: Phase-controlled synthesis, characterization and their enhanced microwave absorption properties[J]. Journal of Materials Chemistry, 2012, 22(30): 15190-15197.
[5] ZHAO H B, FU Z B, CHEN H B, et al.Excellent electromagnetic absorption capability of Ni/Carbon based conductive and magnetic foams synthesized via a green one pot route[J]. ACS Applied Materials & Interfaces, 2016, 8(2): 1468-1477.
[6] WU N D, LIU X G, ZHAO C Y, et al.Effects of particle size on the magnetic and microwave absorption properties of carbon-coated nickel nanocapsules[J]. Journal of Alloys and Compounds, 2016, 656: 628-634.
[7] ZHANG X F, DONG X L, HUANG H, et al.Microwave absorption properties of the carbon-coated nickel nanocapsules[J]. Applied Physics Letters, 2006, 89(5): 053115.
[8] LIU X G, JIANG J J, GENG D Y, et al.Dual nonlinear dielectric resonance and strong natural resonance in Ni/ZnO nanocapsules[J]. Applied Physics Letters, 2009, 94(5): 053119.
[9] FENG X, LIAO G, DU J, et al.Electrical conductivity and microwave absorbing properties of nickel-coated multiwalled carbon nanotubes/poly (phthalazinone ether sulfone ketone)s composites[J]. Polymer Engineering and Science, 2008, 48(5): 1007-1014.
[10] SKOMSKI R, COEY J M D. Permanent Magnetism[M]. Taylor & Francis, 1999.
[11] CULLITY B D, GRAHAM C D.Introduction to Magnetic Materials[M]. Wiley, 2011.
[12] JACOB D S, GENISH I, KLEIN L, et al.Carbon-coated core shell structured copper and nickel nanoparticles synthesized in an ionic liquid[J]. The Journal of Physical Chemistry B, 2006, 110(36): 17711-17714.
[13] NASIBULIN A G, MOISALA A, BROWN D P, et al.Carbon nanotubes and onions from carbon monoxide using Ni(acac)2 and Cu(acac)2 as catalyst precursors[J]. Carbon, 2003, 41(14): 2711-2724.
[14] NISHIJO J, OKABE C, OISHI O, et al.Synthesis, structures and magnetic properties of carbon-encapsulated nanoparticles via thermal decomposition of metal acetylide[J]. Carbon, 2006, 44(14): 2943-2949.
[15] MA C, LUO B, SONG H H, et al.Preparation of carbon- encapsulated metal magnetic nanoparticles by an instant pyrolysis method[J]. New Carbon Materials, 2010, 25(3): 199-204.
[16] NARKIEWICZ U, PODSIADŁY M. Synthesis of carbon- encapsulated nickel nanoparticles[J]. Applied Surface Science, 2010, 256(17): 5249-5253.
[17] CHIANG R T, CHIANG R K, SHIEU F S.Emergence of interstitial-atom-free HCP nickel phase during the thermal decomposition of Ni3C nanoparticles[J]. RSC Advances, 2014, 4(37): 19488-19494.
[18] YUANZHI C.Preparation and magnetic properties of nickel nanoparticles via the thermal decomposition of nickel organometallic precursor in alkylamines[J]. Nanotechnology, 2007, 18(50): 505703.
[19] WANG S, HUANG X, HE Y, et al.Synthesis, growth mechanism and thermal stability of copper nanoparticles encapsulated by multi-layer graphene[J]. Carbon, 2012, 50(6): 2119-2125.
[20] FERRARI A C, ROBERTSON J.Interpretation of Raman spectra of disordered and amorphous carbon[J]. Physical Review B, 2000, 61(20): 14095-14107.
[21] FANG C M, SLUITER M H F, VAN HUIS M A, et al. Structural and magnetic properties of NiCx and NiNx (x=0 to 1/3) solid solutions from first-principles calculations[J]. Physical Review B, 2012, 86(13): 134114.
[22] ZHAO S C, GAO Z, CHEN C Q, et al.Alternate nonmagnetic and magnetic multilayer nanofilms deposited on carbon nanocoils by atomic layer deposition to tune microwave absorption property[J]. Carbon, 2016, 98: 196-203.
[23] LIU T, XIE X, PANG Y, et al.Co/C nanoparticles with low graphitization degree: a high performance microwave-absorbing material[J]. Journal of Materials Chemistry C, 2016, 4(8): 1727-1735.
[24] ZHANG D, XU F, LIN J, et al.Electromagnetic characteristics and microwave absorption properties of carbon-encapsulated cobalt nanoparticles in 2-18 GHz frequency range[J]. Carbon, 2014, 80: 103-111. |
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2018, Vol. 23 
