Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption
Abstract Developing lightweight and broadband microwave absorbers for dealing with serious electromagnetic radiation pollution is a great challenge. Here, a novel Fe–Co/N-doped carbon/reduced graphene oxide (Fe–Co/NC/rGO) composite with hierarchically porous structure was designed and synthetized by...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-09-01
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| Series: | Nano-Micro Letters |
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| Online Access: | http://link.springer.com/article/10.1007/s40820-019-0307-8 |
| _version_ | 1818878706702090240 |
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| author | Shanshan Wang Yingchun Xu Ruru Fu Huanhuan Zhu Qingze Jiao Tongying Feng Caihong Feng Daxin Shi Hansheng Li Yun Zhao |
| author_facet | Shanshan Wang Yingchun Xu Ruru Fu Huanhuan Zhu Qingze Jiao Tongying Feng Caihong Feng Daxin Shi Hansheng Li Yun Zhao |
| author_sort | Shanshan Wang |
| collection | DOAJ |
| description | Abstract Developing lightweight and broadband microwave absorbers for dealing with serious electromagnetic radiation pollution is a great challenge. Here, a novel Fe–Co/N-doped carbon/reduced graphene oxide (Fe–Co/NC/rGO) composite with hierarchically porous structure was designed and synthetized by in situ growth of Fe-doped Co-based metal organic frameworks (Co-MOF) on the sheets of porous cocoon-like rGO followed by calcination. The Fe–Co/NC composites are homogeneously distributed on the sheets of porous rGO. The Fe–Co/NC/rGO composite with multiple components (Fe/Co/NC/rGO) causes magnetic loss, dielectric loss, resistance loss, interfacial polarization, and good impedance matching. The hierarchically porous structure of the Fe–Co/NC/rGO enhances the multiple reflections and scattering of microwaves. Compared with the Co/NC and Fe–Co/NC, the hierarchically porous Fe–Co/NC/rGO composite exhibits much better microwave absorption performances due to the rational composition and porous structural design. Its minimum reflection loss (RLmin) reaches − 43.26 dB at 11.28 GHz with a thickness of 2.5 mm, and the effective absorption frequency (RL ≤ − 10 dB) is up to 9.12 GHz (8.88–18 GHz) with the same thickness of 2.5 mm. Moreover, the widest effective bandwidth of 9.29 GHz occurs at a thickness of 2.63 mm. This work provides a lightweight and broadband microwave absorbing material while offering a new idea to design excellent microwave absorbers with multicomponent and hierarchically porous structures. |
| first_indexed | 2024-12-19T14:18:27Z |
| format | Article |
| id | doaj.art-20bfb74b81e542e2a5957258057e5d13 |
| institution | Directory Open Access Journal |
| issn | 2311-6706 2150-5551 |
| language | English |
| last_indexed | 2024-12-19T14:18:27Z |
| publishDate | 2019-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nano-Micro Letters |
| spelling | doaj.art-20bfb74b81e542e2a5957258057e5d132022-12-21T20:17:54ZengSpringerOpenNano-Micro Letters2311-67062150-55512019-09-0111111610.1007/s40820-019-0307-8Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave AbsorptionShanshan Wang0Yingchun Xu1Ruru Fu2Huanhuan Zhu3Qingze Jiao4Tongying Feng5Caihong Feng6Daxin Shi7Hansheng Li8Yun Zhao9School of Chemistry and Chemical Engineering, Beijing Institute of TechnologySchool of Chemistry and Chemical Engineering, Beijing Institute of TechnologySchool of Chemistry and Chemical Engineering, Beijing Institute of TechnologySchool of Chemistry and Chemical Engineering, Beijing Institute of TechnologySchool of Chemistry and Chemical Engineering, Beijing Institute of TechnologySchool of Materials and the Environment, Beijing Institute of TechnologySchool of Chemistry and Chemical Engineering, Beijing Institute of TechnologySchool of Chemistry and Chemical Engineering, Beijing Institute of TechnologySchool of Chemistry and Chemical Engineering, Beijing Institute of TechnologySchool of Chemistry and Chemical Engineering, Beijing Institute of TechnologyAbstract Developing lightweight and broadband microwave absorbers for dealing with serious electromagnetic radiation pollution is a great challenge. Here, a novel Fe–Co/N-doped carbon/reduced graphene oxide (Fe–Co/NC/rGO) composite with hierarchically porous structure was designed and synthetized by in situ growth of Fe-doped Co-based metal organic frameworks (Co-MOF) on the sheets of porous cocoon-like rGO followed by calcination. The Fe–Co/NC composites are homogeneously distributed on the sheets of porous rGO. The Fe–Co/NC/rGO composite with multiple components (Fe/Co/NC/rGO) causes magnetic loss, dielectric loss, resistance loss, interfacial polarization, and good impedance matching. The hierarchically porous structure of the Fe–Co/NC/rGO enhances the multiple reflections and scattering of microwaves. Compared with the Co/NC and Fe–Co/NC, the hierarchically porous Fe–Co/NC/rGO composite exhibits much better microwave absorption performances due to the rational composition and porous structural design. Its minimum reflection loss (RLmin) reaches − 43.26 dB at 11.28 GHz with a thickness of 2.5 mm, and the effective absorption frequency (RL ≤ − 10 dB) is up to 9.12 GHz (8.88–18 GHz) with the same thickness of 2.5 mm. Moreover, the widest effective bandwidth of 9.29 GHz occurs at a thickness of 2.63 mm. This work provides a lightweight and broadband microwave absorbing material while offering a new idea to design excellent microwave absorbers with multicomponent and hierarchically porous structures.http://link.springer.com/article/10.1007/s40820-019-0307-8Fe-doped Co-MOFHierarchically porousrGOBroadbandMicrowave absorption performance |
| spellingShingle | Shanshan Wang Yingchun Xu Ruru Fu Huanhuan Zhu Qingze Jiao Tongying Feng Caihong Feng Daxin Shi Hansheng Li Yun Zhao Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption Nano-Micro Letters Fe-doped Co-MOF Hierarchically porous rGO Broadband Microwave absorption performance |
| title | Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption |
| title_full | Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption |
| title_fullStr | Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption |
| title_full_unstemmed | Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption |
| title_short | Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption |
| title_sort | rational construction of hierarchically porous fe co n doped carbon rgo composites for broadband microwave absorption |
| topic | Fe-doped Co-MOF Hierarchically porous rGO Broadband Microwave absorption performance |
| url | http://link.springer.com/article/10.1007/s40820-019-0307-8 |
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