Initiating Binary Metal Oxides Microcubes Electromagnetic Wave Absorber Toward Ultrabroad Absorption Bandwidth Through Interfacial and Defects Modulation

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Oct. 9, 2023

Cobalt nickel bimetallic oxides (NiCo2O4) have received numerous attentions in terms of their controllable morphology, high temperature, corrosion resistance and strong electromagnetic wave (EMW) absorption capability. However, broadening the bandwidth is still a huge challenge for NiCo2O4-based absorbers. Herein, unique NiCo2O4@C core-shell microcubes with hollow structures were fabricated via facile sacrificial template strategy. The concentration oxygen vacancies morphologies three-dimensional (3D) cubic framework effectively optimized by adjusting calcination temperature. specially designed 3D structure facilitated multiple reflections incident waves provided rich interfaces between components, generating significant interfacial polarization losses. Dipole polarizations induced could further enhance attenuation ability EM waves. exhibit superior EMW capability minimum RL (RLmin) -84.45 dB at 8.4 GHz thickness 3.0 mm. Moreover, ultrabroad effective (EAB) as large 12.48 (5.52-18 GHz) obtained. This work believed to illuminate path synthesis high-performance cobalt absorbers excellent capability, especially bandwidth.

Language: Английский

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Boron and fluorine Co-doped laser-induced graphene towards high-performance micro-supercapacitors

Carbon, Journal Year: 2023, Volume and Issue: 212, P. 118101 - 118101

Published: May 11, 2023

Laser-induced graphene (LIG) has attracted extensive research as an electrode material for micro-supercapacitors (MSC). However, the low capacitive performance of LIG arising from both limited specific surface area and few active sites remains challenging. Herein, in situ doping fluorine boron atoms into laser-induced was innovatively achieved via laser direct writing approach using boron-doped fluorinated polyimide (FB-PI) precursor. The porous co-doped (FB-LIG) exhibits more improved wettability significantly enhanced due to synergistic effect co-doping. By tuning weight ratio fluorine, MSC utilizing FB-LIG poly(vinyl alcohol) (PVA)/H2SO4 gel electrolyte delivers a high areal capacitance 49.81 mF/cm2 at current density 0.09 mA/cm2, 23 times higher that commercial (PI)-based LIG, 3 PI-based LIG. In addition, MSCs possess excellent mechanical stability flexibility, rendering them promising flexible wearable microelectronics.

Language: Английский

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Energy- and cost-efficient salt-assisted synthesis of nitrogen-doped porous carbon matrix decorated with nickel nanoparticles for superior electromagnetic wave absorption

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(4)

Published: July 1, 2023

Language: Английский

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Durable washable wearable antibacterial thermoplastic polyurethane/carbon nanotube@silver nanoparticles electrospun membrane strain sensors by multi-conductive network

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(3)

Published: May 16, 2023

Language: Английский

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Construction of three-dimensional conductive network and heterogeneous interfaces via different ratio for tunable microwave absorption

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(6)

Published: Oct. 16, 2023

Language: Английский

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Electron-rich biochar enhanced Z-scheme heterojunctioned bismuth tungstate/bismuth oxyiodide removing tetracycline

Inorganic Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 10(20), P. 6045 - 6057

Published: Jan. 1, 2023

In the synthesized BC/BWI catalyst, introduction of biochar and construction Z-type heterojunctions accelerated photogenerated carrier separation to reach an efficient removal tetracycline.

Language: Английский

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Heterodimensional hybrids assembled with multiple-dimensional copper selenide hollow microspheres and graphene oxide nanosheets for electromagnetic energy conversion and electrochemical energy storage

Advanced Composites and Hybrid Materials, Journal Year: 2024, Volume and Issue: 7(1)

Published: Jan. 18, 2024

Language: Английский

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Pore-regulation in 2D biochar-based flakes towards wideband microwave absorption

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 464, P. 142568 - 142568

Published: March 31, 2023

Language: Английский

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Photocatalytic hydrogen under visible light by nitrogen-doped rutile titania graphitic carbon nitride composites: an experimental and theoretical study

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(2)

Published: April 1, 2023

Language: Английский

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Experimental design of paraffin/methylated melamine-formaldehyde microencapsulated composite phase change material and the application in battery thermal management system

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 169, P. 124 - 136

Published: July 19, 2023

In order to maintain the optimal operating temperature of battery surface and meet demand for thermal storage technology, management system based on phase change materials has attracted increasing interest. this work, a kind core-shell structured microcapsule was synthesized by an in-situ polymerization, where paraffin used as core, while methanol applied modify melamine-formaldehyde shell reduce toxicity improve stability. Moreover, three different types heat conductive fillers with same content 10 wt.%, i.e., nano-Al2O3, nano-ZnO carbon nanotubes were added, generating composites. The microcapsules uniform, not affected fillers, which evenly dispersed around. composite sample (10 wt.%) showed highest conductivity 0.50 W/(m K) latent 139.64 J/g. Furthermore, according leakage testing charge/discharge experiments, compared Al2O3 ZnO, addition remarkably enhances ability from 126.98 J/g prepared 125.86 one then J/g, well dissipation performance cooling effect decreasing 2% 12% microcapsule, presents broad application prospect in energy field.

Language: Английский

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