典型文献
Hierarchically porous carbon derived from natural Porphyra for excellent electromagnetic wave absorption
文献摘要：
A highly efficient absorber with features including lightweight,broad bandwidth,and tunable elec-tromagnetic property still remains challenging for practical applications.Herein,the Porphyra-derived porous carbon(PPC)was fabricated via facile procedures of low-temperature pre-carbonization combined with KOH chemical activation.The composition,microstructure,and electromagnetic wave absorption properties of the samples were elucidated based on X-ray diffraction(XRD),Raman,X-ray photoelec-tron spectroscopy(XPS),scanning electron microscopy(SEM),transmission electron microscopy(TEM),Brunauer-Emmer-Teller(BET),and vector network analyzer(VNA).The porosity of PPC can be readily regulated by adjusting activation temperature.The PPC obtained at 750℃was composed of a three-dimensional hierarchically porous carbon network.The C and N elements of natural Porphyra were intro-duced into the carbon skeleton during the carbonization process.The large specific surface,dopants,and three-dimensional hierarchically porous carbon network can effectively improve the impedance matching and dielectric dissipation,leading to an excellent electromagnetic wave absorption performance.Espe-cially,the optimal reflection loss(RL)value reached-57.75 dB at 9.68 GHz with a broad bandwidth(RL＜-10 dB)value of 7.60 GHz at 3.5 mm.Overall,the results indicate that the PPC can provide a new way to achieve lightweight,effective,and sustainable absorbers.
文献关键词：
中图分类号：
作者姓名：
Juhua Luo;Ziyang Dai;Mengna Feng;Xiaowen Chen;Caihong Sun;Ying Xu
作者机构：
School of Materials Science and Engineering,Yancheng Institute of Technology,Yancheng 224051,China;National and Local Joint Engineering Research Center for Mineral Salt Deep Utilization,Huaiyin Institute of Technology,Huaiyin 223003,China
文献出处：
引用格式：
[1]Juhua Luo;Ziyang Dai;Mengna Feng;Xiaowen Chen;Caihong Sun;Ying Xu-.Hierarchically porous carbon derived from natural Porphyra for excellent electromagnetic wave absorption)[J].材料科学技术（英文版）,2022(34):206-214
A类：
Emmer,Espe
B类：
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AB值：
0.593965
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