Design of carbon sphere/magnetic quantum dots with tunable phase compositions and boost dielectric loss behavior

Wu, Guanglei; Cheng, Yonghong; Yang, Zhihong; Jia, Zirui; Wu, Hongjing; Yang, Lieji; Li, Hongliang; Guo, Peizhi; Lv, Hualiang

doi:10.1016/j.cej.2017.09.174

Cited by 404 publications

(85 citation statements)

References 59 publications

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“…In the first step, we propose that PS microspheres convert into carbon structure by releasing small volatile molecules, which might include HCl, methylbenzene and ethylbenzene. In the second step, we conclude that Fe 3 O 4 particles are reduced by as-generated carbon to Fe [29], as showing below in Eq. 4Fe 3 O 4 +C → Fe+CO 2 ↑ Eq.…”

Section: Resultsmentioning

confidence: 53%

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Meng

Zhang

et al. 2018

Ceramics International

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Carbon materials have aroused extensive interests for their remarkable electrical properties as electromagnetic wave (EMW) absorption. However, the synthesis of the wide-band electromagnetic wave absorbent is an insuperable challenge for attaining effective refection loss and electromagnetic matching. Herein, a facile method for large-scale synthesis of monodispersed Fe/Fe 3 O 4 /C composite microspheres is proposed. The carbon microspheres (1-2 μm in diameter) imbedded with nanosized Fe/Fe 3 O 4 2 particles (10-20 nm) are uniformly produced by polymerization and carbothermic reduction processes. The products exhibit the minimum refection loss-45.5 dB at 9.4 GHz and a broad bandwidth of 4.1 GHz below-10 dB from 7.8 GHz to 11.9 GHz with a thickness of 3.0 mm. The absorption mechanism indicates a unique deviated Debye dipolar relaxation effect in the absorbing bandwidth.

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Section: Resultsmentioning

confidence: 53%

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Meng

Zhang

et al. 2018

Ceramics International

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“…With the progression of science and technology, electronic units are developing towards the direction of miniaturization, portability, and high integration [1][2][3][4][5]. Therefore, the electronic packaging industry demands interconnect bonding technology, which could offer excellent electrical conductivity, good flexibility, and satisfied mechanical strength [6][7][8][9]. Besides, it should be cost effective and environmentally benign.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Epoxy Resin Filled with Ti3C2Tx MXene Nanosheets with Excellent Electric Conductivity

et al. 2020

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MXene represents new kinds of two-dimensional material transition metal carbides and/or carbonitrides, which have attracted much attention in various applications including electrochemical storage devices, catalysts, and polymer composite. Here, we report a facile method to synthesize Ti3C2Tx MXene nanosheets and prepare a novel electrically conductive adhesive based on epoxy resin filled with Ti3C2Tx MXene nanosheets by solution blending. The structure, morphology, and performance of Ti3C2Tx MXene nanosheets and epoxy/Ti3C2Tx MXene nanosheets composite were investigated. The results show that Ti3C2Tx MXene possesses nanosheet structure. Ti3C2Tx MXene nanosheets were homogeneously dispersed in epoxy resin. Electrical conductivity and mechanical properties measurements reveal that the epoxy/Ti3C2Tx MXene nanosheet composite exhibited both good electrical conductivity (4.52 × 10−4 S/m) and favorable mechanical properties (tensile strength of 66.2 MPa and impact strength of 24.2 kJ/m2) when the content of Ti3C2Tx MXene nanosheets is 1.2 wt %. Thus, Ti3C2Tx MXene is a promising filler for electrically conductive adhesive with high electric conductivity and high mechanical performance.

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“…5c). Wang et al [118] investigated the EM response (f) (e) (d) (g) 8 [118] behavior of diverse magnetic hierarchical porous carbon (MPC) composites prepared at different annealing temperature using loofah sponge biomass and Fe(NO 3 ) 3 ·9H 2 O as ingredients. From Fig.…”

Section: Biomass-derived Pc-based Ternary Composite Absorbermentioning

confidence: 99%

“…Consequently, the research on use of functional EM absorbers to eliminate the unwanted EM energies has attracted significant attention. Among the reported materials, carbon-based nanomaterials are promising because of their adjustable dielectric properties, low density, and good environmental stability [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption

et al. 2019

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HIGHLIGHTS• The synthetic methods and corresponding mechanisms of porous carbon (PC)-based nanostructures from biomass resource are reviewed.• The application of biomass-derived PC in microwave absorption is discussed in terms of structure and composition optimization.ABSTRACT Currently, electromagnetic (EM) pollution poses severe complication toward the operation of electronic devices and biological systems. To this end, it is pertinent to develop novel microwave absorbers through compositional and structural design. Porous carbon (PC) materials demonstrate great potential in EM wave absorption due to their ultralow density, large surface area, and excellent dielectric loss ability. However, the large-scale production of PC materials through low-cost and simple synthetic route is a challenge. Deriving PC materials through biomass sources is a sustainable, ubiquitous, and low-cost method, which comes with many desired features, such as hierarchical texture, periodic pattern, and some unique nanoarchitecture. Using the bio-inspired microstructure to manufacture PC materials in mild condition is desirable. In this review, we summarize the EM wave absorption application of biomass-derived PC materials from optimizing structure and designing composition. The corresponding synthetic mechanisms and development prospects are discussed as well. The perspective in this field is given at the end of the article.

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Design of carbon sphere/magnetic quantum dots with tunable phase compositions and boost dielectric loss behavior

Cited by 404 publications

References 59 publications

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

In-situ growth of Fe/Fe3O4/C hierarchical architectures with wide-band electromagnetic wave absorption

Preparation and Characterization of Epoxy Resin Filled with Ti3C2Tx MXene Nanosheets with Excellent Electric Conductivity

Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption

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