Zhiwang Hao , Jie Zhou , Shengnan Lin , Di Lan , Hongyu Li , Hui Wang , Dong Liu , Junwei Gu , Xiaobin Wang , Guanglei Wu
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引用次数: 0
摘要
随着电子设备和通信设备的日益普及,迫切需要开发高效的微波吸收材料,以消除电磁波污染的有害影响。异质界面和缺陷工程所带来的非凡优势,加上其独特的电磁特性,为基于 MXene 的电磁衰减吸收材料的开发注入了无限活力。然而,人们对不可逆氧化对二氧化二烯类材料表面化学性质和介电性质的影响仍缺乏了解。通过采用异质表面工程策略来促进界面电荷积累和极化,实现了显著的电磁吸收特性和耐腐蚀性。部分氧化的二氧化二烯烃,尤其是 Ti3C2Tx 和 V2CTx,分别显示出 -56.83 dB 和 -52.13 dB 的显著反射损耗(RL)值。此外,Nb2CTx 复合材料也表现出了卓越的性能,其带宽高达 9.84 GHz。通过对 MXenes 结构变化的广泛研究,这项工作旨在阐明氧化机制,并提出一种生产具有优异吸收特性的 MXenes 的可行方法。
Customized heterostructure of transition metal carbides as high-efficiency and anti-corrosion electromagnetic absorbers
The ever-increasing presence of electronic devices and communication equipment imposes a critical demand for the development of highly efficient microwave absorption materials, as a means to combat the detrimental effects of electromagnetic (EM) wave pollution. The extraordinary advantages offered by heterointerface and defect engineering, coupled with their distinctive electromagnetic traits, infuse boundless energy into the development of MXene-based absorbers for EM attenuation. However, there is still a lack of understanding regarding the consequences of irreversible oxidation on the surface chemistry and dielectric properties of MXenes. Through the employment of heterointerface engineering strategy to promote interfacial charge accumulation and polarization, remarkable EM absorption properties coupled with corrosion resistance have been realized. The partially oxidized MXenes, particularly Ti3C2Tx and V2CTx, displayed remarkable reflection loss (RL) values of −56.83 dB and −52.13 dB, respectively. Additionally, the Nb2CTx composites showcased exceptional performance, offering a significantly broader bandwidth of 9.84 GHz. By conducting an extensive examination of the structural changes in MXenes, this work aims to elucidate the oxidation mechanisms and proposes a feasible method for producing MXenes with excellent absorption properties.
期刊介绍:
The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.