Ultralight N-doped platanus acerifolia biomass carbon microtubes/RGO composite aerogel with enhanced mechanical properties and high-performance microwave absorption

Wu, Peikun; Feng, Yingrui; Xu, Jie; Fang, Zhenguo; Liu, Qiangchun; Kong, Xiangkai

doi:10.1016/j.carbon.2022.10.011

Cited by 59 publications

(9 citation statements)

References 60 publications

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“…Due to the superior electron hopping ability of the rGO layer and the poor electron hopping ability of Gd 2 O 2 S nanosheets, the resulting rapid interfacial electron hopping is conducive to enhancing interfacial polarization loss. The low-frequency region shows a straight line, which means a conduction loss capacity for Gd 2 O 2 S/rGO composites . The Cole–Cole curve of Gd 2 O 2 S possesses several semicircles with no straight-line part, meaning the presence of only various dielectric relaxation processes (Figure S9).…”

Section: Resultsmentioning

confidence: 98%

High-Quality Ultrathin Gd₂O₂S Nanosheets with Oxygen Vacancy-Decorated rGO for Enhanced Electromagnetic Wave Absorption

Li,

Wen,

et al. 2023

ACS Appl. Mater. Interfaces

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The development of extreme performance and multifunctional electromagnetic (EM) wave absorption materials is essential to eliminating undesirable frequency EM pollution. As a promising rare-earth compound, gadolinium oxysulfide (Gd 2 O 2 S) has become a significant field of study among nanomaterials with multidisciplinary applications. Herein, the ultrathin Gd 2 O 2 S nanosheets with 1 nm thickness were fabricated via a facile hot injection method and then mixed with reduced graphene oxide (rGO) through coassemble and carbonization methods to form Gd 2 O 2 S/rGO composites. As a new kind of multifunction EM-wave absorption materials, Gd 2 O 2 S/rGO composites exhibited excellent EM-wave absorption performance with an absorption capacity of −65 dB (2.1 mm) and an adequate absorption bandwidth of 5.6 GHz at 1.9 mm. Additionally, their EM-wave absorption mechanisms have been unveiled for the first time. The outstanding EM-wave absorption performance of Gd 2 O 2 S/rGO composites could be attributed to the ultrathin Gd 2 O 2 S nanosheets with oxygen vacancy and rGO layers with high conductivity and large specific surface area, which will also facilitate the polarization loss, conductivity loss, and multiple reflection and scattering of EM waves between the rGO layer and Gd 2 O 2 S nanosheets. Overall, compared to previously reported rGO-based EM-wave absorption materials, this work provides a promising approach for the exploitation and synthesis of Gd 2 O 2 S/rGO composites with lightweight and high-performance microwave attenuation.

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Section: Resultsmentioning

confidence: 98%

High-Quality Ultrathin Gd₂O₂S Nanosheets with Oxygen Vacancy-Decorated rGO for Enhanced Electromagnetic Wave Absorption

Li,

Wen,

et al. 2023

ACS Appl. Mater. Interfaces

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“…When a sample is subjected to an alternating magnetic field, the magnetic components therein can induce eddy currents, which can convert microwaves into thermal energy. Based on the skin effect, the eddy current loss C 0 can be expressed as a function of frequency C 0 = μ ″ ( μ ′ ) − 2 f − 1 …”

Section: Resultsmentioning

confidence: 99%

Toward Enhanced S-Band Absorption Ability via Ni Element Modification of Peach Pit Carbon

Yang,

Xiong,

Wang

et al. 2023

Ind. Eng. Chem. Res.

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The problem of microwave pollution becomes more serious with the widespread popularity of electronic equipment; the development of microwave absorption materials has assumed critical importance. However, most reported carbon-based microwave absorption materials have no obvious absorption performance in 2–4 GHz (S band), which seriously limits their application. In this work, Ni(OH)2-coated peach pit carbon [Ni(OH)2/C1] is prepared by simple precipitation to achieve a minimum reflection loss (RL) value of −46.2 dB (5.6 mm, at 2.9 GHz) and absorption band cover 2.54–4 GHz in the thickness range of 3.7–6 mm in the S-band. In addition, Ni(OH)2/C1 achieved an RLmin value of −58.05 dB (2.7 mm, at 7.68 GHz) and maximum effective absorption bandwidth (EAB) of 3.95 GHz in the range 2–18 GHz. Our work provides new insights into the microwave absorption in low frequencies and expands the application range and scenarios of carbon-based materials.

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“…Biomass‐derived carbon (BC) has attracted considerable interest due to the large number of heteroatoms and defects that can be used as active sites for lithium storage [6–8] . BC not only has large specific surface volume, abundant adjustable pore structure, good conductivity and stable electrochemical performance, but also can increase the electrical conductivity and additional active sites of materials of carbon through self‐doping effect (such as oxygen, nitrogen, sulfur and other elements) [9–12] . And they are certainly more advantageous in terms of raw material sources and costs.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen‐rich Graphite Flake from Hemp as Anode Material for High Performance Lithium‐ion Batteries

Wang

Sui

Sha

et al. 2023

Chemistry An Asian Journal

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Biomass-derived carbon (BC) has attracted extensive attention as anode material for lithium ion batteries (LiBs) due to its natural hierarchical porous structure and rich heteroatoms that can adsorb Li + . However, the specific surface area of pure biomass carbon is generally small, so we can help NH 3 and inorganic acid produced by urea decomposition to strip biomass, improve its specific surface area and enrich nitrogen elements. The nitrogen-rich graphite flake obtained by the above treatment of hemp is named NGF. The product that has a high nitrogen content of 10.12% has a high specific surface area of 1151.1 m 2 g À 1 . In the lithium ion battery test, the capacity of NGF is 806.6 mAh g À 1 at 30 mA g À 1 , which is twice than that of BC. NGF also showed excellent performance that is 429.2 mAh g À 1 under high current testing at 2000 mA g À 1 . The reaction process kinetics is analyzed and we found that the outstanding rate performance is attributed to the large-scale capacitance control. In addition, the results of the constant current intermittent titration test indicate that the diffusion coefficient of NGF is greater than that of BC. This work proposes a simple method of nitrogen-rich activated carbon, which has a significantly commercial prospect.

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Ultralight N-doped platanus acerifolia biomass carbon microtubes/RGO composite aerogel with enhanced mechanical properties and high-performance microwave absorption

Cited by 59 publications

References 60 publications

High-Quality Ultrathin Gd₂O₂S Nanosheets with Oxygen Vacancy-Decorated rGO for Enhanced Electromagnetic Wave Absorption

High-Quality Ultrathin Gd₂O₂S Nanosheets with Oxygen Vacancy-Decorated rGO for Enhanced Electromagnetic Wave Absorption

Toward Enhanced S-Band Absorption Ability via Ni Element Modification of Peach Pit Carbon

Nitrogen‐rich Graphite Flake from Hemp as Anode Material for High Performance Lithium‐ion Batteries

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Ultralight N-doped platanus acerifolia biomass carbon microtubes/RGO composite aerogel with enhanced mechanical properties and high-performance microwave absorption

Cited by 59 publications

References 60 publications

High-Quality Ultrathin Gd2O2S Nanosheets with Oxygen Vacancy-Decorated rGO for Enhanced Electromagnetic Wave Absorption

High-Quality Ultrathin Gd2O2S Nanosheets with Oxygen Vacancy-Decorated rGO for Enhanced Electromagnetic Wave Absorption

Toward Enhanced S-Band Absorption Ability via Ni Element Modification of Peach Pit Carbon

Nitrogen‐rich Graphite Flake from Hemp as Anode Material for High Performance Lithium‐ion Batteries

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Product

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High-Quality Ultrathin Gd₂O₂S Nanosheets with Oxygen Vacancy-Decorated rGO for Enhanced Electromagnetic Wave Absorption

High-Quality Ultrathin Gd₂O₂S Nanosheets with Oxygen Vacancy-Decorated rGO for Enhanced Electromagnetic Wave Absorption