姬广斌

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教授 博士生导师

招生学科专业:
化学 -- 【招收硕士研究生】 -- 材料科学与技术学院
材料科学与工程 -- 【招收博士、硕士研究生】 -- 材料科学与技术学院
材料与化工 -- 【招收博士、硕士研究生】 -- 材料科学与技术学院
能源动力 -- 【招收博士、硕士研究生】 -- 材料科学与技术学院

性别:男

学历:南京大学

学位:理学博士学位

所在单位:材料科学与技术学院

办公地点:江宁校区1号楼14楼408A

联系方式:18005152399

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Multiple Interfaces Structure Derived from Metal-Organic Frameworks for Excellent Electromagnetic Wave Absorption

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所属单位:材料科学与技术学院

发表刊物:PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION

关键字:electromagnetic wave absorption interfacial polarization nanoporous carbon NiO/Ni/graphene yolk-shell structures

摘要:Hierarchical yolk-shell nanostructure (NiO/Ni/GN@Air@NiO/Ni/GN) derived from Ni-based metal-organic frameworks (Ni-MOFs) is synthesized by solvothermal reactions. After successive carbonization and oxidation treatments, hierarchical NiO/Ni nanocrystals covered with a graphene shell are obtained with the yolk-shell nanostructure intact. The NiO/Ni/GN@Air@NiO/Ni/GN composites are characterized by X-ray diffraction, scanning electron microscopy, and transmission electron micro-scopy. The results indicate that the NiO/Ni/GN@Air@NiO/Ni/GN composites exhibit superior electromagnetic wave absorption properties. A minimum reflection loss (RLmin) of -34.5 dB is obtained at 17.2 GHz with the thin thickness of 1.7 mm. In addition, the best microwave absorption properties are achieved with a 2.0 mm absorber layer (RLmin = -22.5 dB, bandwidth of 6.0 GHz). The outstanding absorption ability may arise from the unique yolk-shell structure and nanoporous carbon, which can tune the dielectric of the NiO/Ni/GN@Air@NiO/Ni/GN composites to acquire good impedance matching. Moreover, the interspaces can induce interfacial polarization and multiple reflections.

ISSN号:0934-0866

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发表时间:2017-05-01

合写作者:梁小会,权斌,孙延生,张亚男,马建娜,李道冉,张豹山,都有为

通讯作者:姬广斌