Investigation on the critical factors of MoSe 2 -based microwave absorbing property
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Investigation on the critical factors of MoSe2-based microwave absorbing property Ying Xia1, Wenfeng Zhu1, Qing Zhu1, Jiandong Wu1, Zhuguang Nie1, Weidong Zhang1,*, Shuirong Zheng1, and Shuhua Qi1,* 1
School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072 Xi’an, China
Received: 14 September 2020
ABSTRACT
Accepted: 21 October 2020
MoSe2 is a graphene-like material with hierarchical structure similar to MoS2, which is similar to many transition metal sulfides. Compared with MoS2, a widely used microwave absorber, MoSe2 possesses a narrower bandgap. Due to the high similarity between MoSe2 and MoS2, MoSe2 is considered as a dielectric loss type of microwave absorber. In recent years, layered, spherical and flowerlike microstructures are popular due to their unique multi interface nanostructures and good interfacial loss ability. In this work, the relationship between MoSe2 with three morphological structures (MoSe2-NS, MoSe2-MS and MoSe2NF), the introduction of C source and MAP were studied. MoSe2-NF has the best effective absorption bandwidth of electromagnetic wave, reaching 6.1 GHz (11.9 GHz–18.0 GHz) and the minimum RL value is - 38.5 dB, covering the whole Ku band. When the thickness of MoSe2/C is 1.7 mm, the corresponding effective absorption bandwidth (RL \ - 10 dB) is as high as 6.2 GHz (11.8 GHz–18.0 GHz) and the minimum RL is - 43.1 dB.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction Electromagnetic (EM) waves pollution has become increasingly serious and ubiquitous, due to the abuse of electronic communication equipment and facilities, which have been attracted great attention originated from people’s health and industrial production [1–7]. It is urgent to exploit EM protection materials with ‘‘thin, light, wide and strong’’ performances that requires thin thickness, low density, wide absorption frequency range and strong absorption capacity[8–13].
Graphene, as the most typical low-dimensional nanomaterials, has been extensively and in-depth explored [14, 15]. Researches on Graphene about its ability to absorb microwaves are adequate. Molybdenum selenide (MoSe2) as a member of the metal chalcogenide semiconductor nanocrystals group III– V compound family possessing a typical graphitelike microstructure that is a kind of non-centrosymmetric material with indirect energy gap, which is slightly different from graphene and has potential application prospects in many fields such as photocatalysis, friction, photoelectric detection, energy storage, solar cells, supercapacitors, and biosensing.
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https://doi.org/10.1007/s10854-020-04737-1
J Mater Sci: Mater Electron
As a result of its unique properties such as large specific surface area, high conductivity, high reactivity and strong microwave absorption [16–22]. For example, Yan et al. [23] prepare flower-like MoSe2 spheres to eliminate microwave interference, the results shown that flower-like MoSe2 i
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