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    A research team of AUST has made important progress in the research of graphene-based three-dimensional lightweight wave-absorbing materials
    2021-04-30 | BROWSE TIMES: | Edit:admin

    Recently, Professor ShuRuiwen’sresearch teamatthe School of Chemical Engineering has made important progress in the research of graphene-based three-dimensional lightweight wave-absorbing materials, and published a paper entitled "Synthesis of ultralight three-dimensional nitrogen-doped reduced graphene oxide/multiwalled carbon nanotubes/zinc ferritecomposite aerogel for highly efficient electromagnetic wave absorption" in the Journal of Colloid and Interface Science (IF =7.489, JCR Q1, CASPartition1, Top Journal).

    Synthesis process and performance mechanism of nitrogen-doped graphene/multi-walled carbon nanotubes/zinc ferrite composite aerogel

    The development of new wave-absorbing materials with light weight, broadband, strong absorption and thin thickness is an effective way to address electromagnetic radiation pollution. In this study, nitrogen-doped graphene/multi-walled carbon nanotubes/zinc ferrite (NRGO/MWCNTs/ZnFe2O4) ternary magnetic composite aerogels were synthesized by a two-step solvent heat and hydrothermalreactioncombined with freeze-drying technique. It was found that the composite conductive MWCNTs and magnetic ZnFe2O4 microspheres can effectively enhance the wave absorption performance of NRGO aerogel; the obtained ternary composite aerogel has an extremely low density (0.0144g·cm-3) and excellent comprehensive wave absorption performance, with a minimum reflection loss of -52.6dB when the filler content is 10wt% and the matched thickness is 1.7mm ( 99.999% absorption), the specific reflection loss is as high as -30.9dB/mm; the effective absorption bandwidth is 5.1GHz (12.7~17.8GHz) when the matching thickness is 1.65mm. The excellent wave absorption performance of this composite aerogel is mainly attributed to the unique three-dimensional mesh-like porous structure, good impedance matching, enhanced polarization loss (dipole polarization, interfacepolarization, etc.), magnetic resonance loss and conduction loss. This study provides new ideas for the design and development of carbon-based lightweight and high-performance wave-absorbing materials.

    Anhui University of Science and Technology is the first unit to complete thepaper.LiNingning, a master’sdegree candidateatthe School of Chemical Engineering(grade2020), is the first author of the paper, and Professor ShuRuiwen is the corresponding author of the paper. This research work was supported by the Outstanding Young Scientists Fund of Anhui Province, the Key Project of Natural Science Research of Anhui Provincial Department of Education, China Postdoctoral Science Foundation, and the Special Fund for Environmentally Friendly Materials and Occupational Health Research Institute (Wuhu) of AUST.



    Written byQian Yuan

    Reviewed byLiu Feng

    Edited by Xia Yafeng

    Approved by Ruan Jinhua

    Translated by Wang Yijun


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