Ultrabroad Microwave Absorption Ability and Infrared Stealth Property of Nano-Micro CuS@rGO Lightweight Aerogels

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Авг. 20, 2022

Developing ultrabroad radar-infrared compatible stealth materials has turned into a research hotspot, which is still problem to be solved. Herein, the copper sulfide wrapped by reduced graphene oxide obtain three-dimensional (3D) porous network composite aerogels (CuS@rGO) were synthesized via thermal reduction ways (hydrothermal, ascorbic acid reduction) and freeze-drying strategy. It was discovered that phase components (rGO CuS phases) micro/nano structure (microporous nanosheet) well-modified modulating additive amounts of changing ways, resulted in variation pore structure, defects, complex permittivity, microwave absorption, radar cross section (RCS) value infrared (IR) emissivity. Notably, obtained CuS@rGO with single dielectric loss type can achieve an bandwidth 8.44 GHz at 2.8 mm low filler content 6 wt% hydrothermal method. Besides, aerogel realizes minimum reflection (RLmin) - 60.3 dB lower 2 wt%. The RCS reach 53.3 m2, effectively reduces probability target being detected detector. Furthermore, laminated architecture multicomponent endowed insulation IR versatility. Thus, this work offers facile method design develop rGO-based absorbers radar-IR stealth.

Язык: Английский

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Recent Progress of Metal Sulfide Photocatalysts for Solar Energy Conversion

Advanced Materials, Год журнала: 2022, Номер 34(45)

Опубликована: Май 27, 2022

Artificial photosynthetic solar-to-chemical cycles enable an entire environment to operate in a more complex, yet effective, way perform natural photosynthesis. However, such artificial systems suffer from lack of well-established photocatalysts with the ability harvest solar spectrum and rich catalytic active-site density. Benefiting extensive experimental theoretical investigations, this bottleneck may be overcome by devising photocatalytic platform based on metal sulfides predominant electronic, physical, chemical properties. These tunable properties can endow them abundant active sites, favorable light utilization, expedited charge transportation for conversion. Here, it is described how some vital lessons extracted previous investigations are employed promote further development photosynthesis, including water splitting, CO2 reduction, N2 pollutant removal. Their functions, properties, synthetic strategies, emerging issues, design principles, intrinsic functional mechanisms redox reactions discussed detail. Finally, associated challenges prospects utilization highlighted future trends photocatalysis envisioned.

Язык: Английский

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0D/1D/2D architectural Co@C/MXene composite for boosting microwave attenuation performance in 2–18 GHz

Carbon, Год журнала: 2022, Номер 193, С. 182 - 194

Опубликована: Март 15, 2022

Язык: Английский

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Synthesis of CuCo2S4@Expanded Graphite with crystal/amorphous heterointerface and defects for electromagnetic wave absorption

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Сен. 23, 2023

The remarkable advantages of heterointerface and defect engineering their unique electromagnetic characteristics inject infinite vitality into the design advanced carbon-matrix wave absorbers. However, understanding interface dipole effects based on microscopic macroscopic perspectives, rather than semi-empirical rules, can facilitate heterointerfaces defects to adjust impedance matching absorption material, which is currently lacking. Herein, CuCo2S4@Expanded Graphite heterostructure with multiple cation are reported, morphology, interfaces component regulated by varying concentration metal ions. results show that 3D flower-honeycomb crystal-crystal/amorphous abundant effectively conductive polarization losses, achieve balance carbon materials, improve wave. For sample CEG-6, effective Ku band RLmin -72.28 dB bandwidth 4.14 GHz realized at 1.4 mm, while filler loading only 7.0 wt. %. This article reports establishment potential relationship between heterointerfaces, defects, materials.

Язык: Английский

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Graphene Oxide‐Assisted Multiple Cross‐Linking of MXene for Large‐Area, High‐Strength, Oxidation‐Resistant, and Multifunctional Films

Advanced Functional Materials, Год журнала: 2022, Номер 33(11)

Опубликована: Дек. 30, 2022

Abstract Transition metal carbides/nitrides (MXenes) with metallic electrical conductivity and excellent processability attract increasing attention for assembling multifunctional macrostructures. However, the challenges, involving poor mechanical strength, inferior oxidation stability, limited scalable manufacturing, impede their wide applications. Herein, large‐area, high‐strength, ultra‐flexible hybrid films are developed through multiple physical chemical cross‐linking of MXene/cellulose facilitated by graphene oxide. The MXene‐based manifest significantly improved hydrophobicity, water/solvent resistance, meanwhile, maintain electromagnetic interference shielding performance. X‐band surface‐specific effectiveness (SE) 18,837.5 dB cm 2 g −1 an SE over 60 in ultra‐broadband frequency range achieved, comparable to best shields ever reported. Furthermore, wearable demonstrate photothermal antibacterial electrothermal deicing Thus, such high‐performance a facile manufacturing method have substantial application prospects flexible electronics, thermotherapy, compatibility, aerospace.

Язык: Английский

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Advancements in Microwave Absorption Motivated by Interdisciplinary Research

Advanced Materials, Год журнала: 2023, Номер 36(4)

Опубликована: Окт. 23, 2023

Abstract Microwave absorption materials (MAMs) are originally developed for military purposes, but have since evolved into versatile with promising applications in modern technologies, including household use. Despite significant progress bench‐side research over the past decade, MAMs remain limited their scope and yet to be widely adopted. This review explores history of from first‐generation coatings second‐generation functional absorbers, identifies bottlenecks hindering maturation. It also presents potential solutions such as exploring broader spatial scales, advanced characterization, introducing liquid media, utilizing novel toolbox (machine learning, ML), proximity lab end‐user. Additionally, it meticulously compelling medicine, mechanics, energy, optics, sensing, which go beyond efficiency, along current development status prospects. interdisciplinary direction differs previous primarily focused on meeting traditional requirements (i.e., thin, lightweight, wide, strong), can defined next generation smart absorbers. Ultimately, effective utilization ubiquitous electromagnetic (EM) waves, aided by third‐generation MAMs, should better aligned future expectations.

Язык: Английский

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Intrinsic mechanism and multiphysics analysis of electromagnetic wave absorbing materials: New horizons and breakthrough

Journal of Material Science and Technology, Год журнала: 2022, Номер 130, С. 136 - 156

Опубликована: Май 31, 2022

Язык: Английский

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Trimetallic Prussian blue analogue derived FeCo/FeCoNi@NPC composites for highly efficient microwave absorption

Composites Part B Engineering, Год журнала: 2022, Номер 246, С. 110268 - 110268

Опубликована: Сен. 5, 2022

Язык: Английский

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Ultrathin self-assembly MXene/Co-based bimetallic oxide heterostructures as superior and modulated microwave absorber

Journal of Material Science and Technology, Год журнала: 2022, Номер 134, С. 132 - 141

Опубликована: Июль 23, 2022

Язык: Английский

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From “100%” Utilization of MAX/MXene to Direct Engineering of Wearable, Multifunctional E‐Textiles in Extreme Environments

Advanced Functional Materials, Год журнала: 2023, Номер 33(41)

Опубликована: Авг. 24, 2023

Abstract Transition metal carbides/nitrides (MXenes) show great potential for preparing wearable, flexible multifunctional e‐textiles due to the exceptional electrical and mechanical properties easy processing in aqueous medium. At present, MXene‐based face challenges including high production costs, low utilization of precursor titanium aluminum carbide (MAX), poor durability extreme environments, inability achieve a balance between large‐scale fabrication performance. Here, this work proposes “100%” MAX/MXene strategy produce additive‐free conductive inks with controllable viscosity, subsequently enabling an accessible, scalable direct‐blade‐coating followed by chemical cross‐linking approach creating high‐performance, that perform conditions. The structural design provides integrated multifunctionality involving electromagnetic interference (EMI) shielding within ultrabroadband frequency range, visual electrothermal conversion, deicing, remarkable photothermal, antibacterial This employs process is simple, cost‐effective, scalable, presenting novel “100% efficiency” “waste‐to‐wealth” manufacture robust, durable, e‐textiles. exciting next generation wearable electronics, EMI compatibility, heating, thermotherapy, treatments, defense, aerospace applications.

Язык: Английский

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