Integrating CoNi nanoparticles encapsulated by few-layer h-BN with excellent thermal conductivity and thermal stability

Fan, Dongliang; Lv, Xiaomeng; Feng, Jin; Zhang, Suyun; Xie, Jimin; Li, Jun

doi:10.1016/j.jallcom.2017.02.093

Cited by 8 publications

(2 citation statements)

References 38 publications

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“…Hexagonal boron nitride (h-BN) is known by the name white graphite. − As an isoelectronic body of graphite, h-BN that possesses a graphene-like two-dimensional layered structure exhibits excellent insulation, thermal conductivity, and thermal stability. , High-temperature resistance, pressure resistance, chemical corrosion resistance, anti-oxidation property, and good neutron radiation shielding performance make h-BN a new material with excellent performances and great development potential . The h-BN in-plane B and N atoms are associated by σ covalent bonds, forming a honeycomb-like structure with an interlayer thermal conductivity that can reach 300 W/(m·K) and still maintain its properties at 900 °C .…”

Section: Introductionmentioning

confidence: 99%

The Synthesis and Characterization of h-BN Nanosheets with High Yield and Crystallinity

Lou

et al. 2021

ACS Omega

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Nowadays, boron nitride (BN) has attracted a great deal of attention due to its physical and chemical properties, such as high-temperature resistance, oxidation resistance, heat conduction, electrical insulation, and neutron absorption. The unique lamellar, reticular, and tubular morphologies and physicochemical properties of BN make it attractive in the fields of adsorption, catalysis, hydrogen storage, thermal conduction, insulation, dielectric substrate of electronic devices, radiation protection, polymer composites, medicine, etc. Based on this, we propose a novel method to produce boron nitride nanosheets (BNNSs) by a two-step method. The structure and morphology of the prepared BNNSs were characterized by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, XRD, FTIR, etc. The results showed that the prepared BNNSs had high crystallinity and the stripping efficiency of h-BN as well as the performance and yield of BNNSs had been improved, and the cost and environmental pollution of BNNS preparation had been reduced accordingly.

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Section: Introductionmentioning

confidence: 99%

The Synthesis and Characterization of h-BN Nanosheets with High Yield and Crystallinity

Lou

et al. 2021

ACS Omega

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“…Hexagonal boron nitride (h-BN), a structural analogue of graphite (known as white graphene), is composed of alternating boron and nitrogen atoms in a honeycomb arrangement that is connected by sp 2 -hybridized B–N covalent bonds. , Due to its superb thermal conductivity, high mechanical strength, and excellent chemical and thermal stability (stable in air up to 1000 °C), h-BN has attracted massive research interest in many fields, such as electronic encapsulation, polymeric composite, and catalysis . Besides these, the local polarity of B–N bonds imparts h-BN excellent adsorption ability toward liquid and gaseous molecules. , Recently, Gao et al claimed that h-BN possesses adsorption capability toward elemental mercury by performing theoretical calculations.…”

Section: Introductionmentioning

confidence: 99%

Copper Sulfide-Loaded Boron Nitride Nanosheets for Elemental Mercury Removal from Simulated Flue Gas

Liu

et al. 2021

Energy Fuels

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Hexagonal boron nitride (h-BN), as a novel carbon-free layered material, has received extensive attention owing to its high mechanical strength and excellent chemical and thermal stability. Herein, an h-BN nanosheet is employed to capture elemental mercury (Hg 0 ) from simulated flue gas in a fixed-bed reactor at low temperatures. The h-BN displays mercury adsorption capability with the Hg 0 removal efficiency of 26.4−43.6% within 50−200 °C. CuS decoration can remarkably enhance the mercury capture performance of h-BN. The 10CuS/h-BN with a CuS loading value of 10 wt % performs the best. Complete mercury capture can be achieved over 10CuS/h-BN at 50−100 °C. The presence of NO inhibits Hg 0 removal to some extent, while the presence of SO 2 hardly shows any impact on Hg 0 capture. The copper and polysulfide sites as well as the nanoscale lamellar structure of h-BN account for the good Hg 0 capture performance of CuS-loaded h-BN.

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Shape Anisotropic Chain‐Like CoNi/Polydimethylsiloxane Composite Films with Excellent Low‐Frequency Microwave Absorption and High Thermal Conductivity

He,

Hu,

Yan

et al. 2024

Adv Funct Materials

107

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The demand for low‐frequency microwave absorption materials is becoming more and more urgent. Novel shape anisotropy chain‐like CoNi is fabricated using polyvinylpyrrolidone as a shape‐directing agent via solvothermal method, which is then mixed with polydimethylsiloxane (PDMS) to prepare corresponding multifunctional chain‐like CoNi/PDMS composite films. Shape anisotropy and strong magnetic coupling effect of chain‐like CoNi enhance natural resonance and magnetic loss capability. The minimum reflection loss (RLmin) is −50.5 dB and low‐frequency effective absorption bandwidth (EAB) is 1.04 GHz (2.64–3.68 GHz) at 3.9 mm for chain‐like CoNi. The corresponding 18 vol% chain‐like CoNi/PDMS composite films present optimal low‐frequency microwave absorption performance with RLmin of −56.7 dB and low‐frequency EAB of 1.04 GHz (2.96–4.00 GHz) at 4.1 mm, which is far superior to 18 vol% spherical CoNi/PDMS composite films with RLmin of −9.5 dB. Meantime, the in‐plane and inter‐plane thermal conductivity coefficients of 18 vol% chain‐like CoNi/PDMS composite films are 2.05 and 0.61 W m−1 K−1, about 1.5 times higher than 18 vol% spherical CoNi/PDMS composite films (1.36 and 0.42 W m−1 K−1), also 220% and 190% higher than pure PDMS (0.64 and 0.21 W m−1 K−1). This composite films with low‐frequency microwave absorption and thermal conductivity can broaden applications in 5G communications and flexible electronics.

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Integrating CoNi nanoparticles encapsulated by few-layer h-BN with excellent thermal conductivity and thermal stability

Cited by 8 publications

References 38 publications

The Synthesis and Characterization of h-BN Nanosheets with High Yield and Crystallinity

The Synthesis and Characterization of h-BN Nanosheets with High Yield and Crystallinity

Copper Sulfide-Loaded Boron Nitride Nanosheets for Elemental Mercury Removal from Simulated Flue Gas

Shape Anisotropic Chain‐Like CoNi/Polydimethylsiloxane Composite Films with Excellent Low‐Frequency Microwave Absorption and High Thermal Conductivity

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