Bimetallic sulfides embedded into porous carbon composites with tunable magneto-dielectric properties for lightweight biomass- reinforced microwave absorber |
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| Affiliation: | 1. School of Science, Xi''an University of Posts and Telecommunications, Xi''an, 710121, China;2. School of Materials and Chemical Engineering, Xi''an Technological University, Xi''an, 710021, China;1. School of Materials and Energy, Southwest University, Chongqing, 400715, China;2. College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China;1. School of Electrical and Mechanical Engineering, The University of Adelaide, Adelaide, 5005, SA, Australia;2. Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia;3. Adelaide Microscopy, The University of Adelaide, Adelaide, 5005, SA, Australia;1. Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing, 408100, PR China;2. Chongqing Sports Medicine Center, Department of Orthopedic Surgery, Southwest Hospital, The Third Military Medical University, Chongqing, 400038, People''s Republic of China;3. School of Robot Engineering, Yangtze Normal University, Chongqing, 408100, PR China;4. MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems, CQU-NUS Renewable Energy Materials & Devices Joint Laboratory, School of Energy & Power Engineering, Chongqing University, Chongqing, 400044, China;1. School of Chemistry and Environment, Yunnan Minzu University, Kunming, 650500, PR China;2. Key Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Regions, Yunnan Minzu University, Kunming, 650500, PR China;3. Chemical Engineering Department, Khalifa University, Abu Dhabi, United Arab Emirates;4. Yunnan Yongchang Silicon Industry Co., Ltd, PR China |
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| Abstract: | Currently, biomass-derived porous carbon materials have great potential for the development of advanced microwave absorbing materials (MAMs) with lightweight, high performance, wide effective bandwidth (EAB), and thin matching thickness. Herein, we reported low-cost, high-performance MAMs for the successful anchoring of Cu-based bimetallic sulfides CuCo2S4@CoS2 on biomass porous carbon (BPC) derived from pistachio shells using a simple carbonization, hydrothermal, and electrostatic self-assembly method. The results demonstrate that the prepared BPC@CuCo2S4@CoS2 composite exhibits excellent microwave absorption due to its balanced impedance matching and the combined effect of conductive loss, dipole polarization, interfacial polarization, dielectric loss, and magnetic loss. To be precise, the minimum reflection loss (RLmin) of BPC@CuCo2S4@CoS2 reaches −64.2 dB at a packing load of 20 wt%, with an EAB of 6.6 GHz and a thickness of 2.3 mm. This work provides new insights into the study of copper-based bimetallic sulfide and BPC composites in MAMs. |
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| Keywords: | Porous carbon Interfacial polarization Microwave absorption |
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