A kind of tunable Co/C microwave absorber derived from Co-ZIF-9 for lightweight and efficient microwave absorber
Herein, a novel rod-like Co/C composite has been synthesized successfully through an easy approach with a cobaltic metal-organic framework (Co-ZIF-9) as the precursor. After the process of high temperature pyrolysis, porous carbon implanted with governable cobalt nanoparticles was obtained. Due to t...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-10-01
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| Series: | Composites Part C: Open Access |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666682020300396 |
| _version_ | 1818664592685924352 |
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| author | Ailun Zhao Yan Wu Lina Huang |
| author_facet | Ailun Zhao Yan Wu Lina Huang |
| author_sort | Ailun Zhao |
| collection | DOAJ |
| description | Herein, a novel rod-like Co/C composite has been synthesized successfully through an easy approach with a cobaltic metal-organic framework (Co-ZIF-9) as the precursor. After the process of high temperature pyrolysis, porous carbon implanted with governable cobalt nanoparticles was obtained. Due to the Co nanoparticles with the magnetic loss and the porous carbon contributing for the dielectric loss, the combination of the two with the interfacial polarization, the ferromagnetic composites inhibited improved electromagnetic wave absorption. The Co/C composite with 800 °C pyrolysis temperature demonstrated the biggest Co sizes as well as the best electromagnetic absorbing performance among the three samples. The Co/C composite at 800 °C shows thin thickness, lightweight and strong absorption performance, which may be owing to the interactive effects connecting dielectric and magnetic loss. In this work, an optimum value of reflection loss was reached at -44.3 dB with a layer thickness of 2.8 mm and meanwhile with 10 wt.% of the loading content. |
| first_indexed | 2024-12-17T05:35:12Z |
| format | Article |
| id | doaj.art-00b2892838534fd6a5b6c51ae69e0cfd |
| institution | Directory Open Access Journal |
| issn | 2666-6820 |
| language | English |
| last_indexed | 2024-12-17T05:35:12Z |
| publishDate | 2020-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Composites Part C: Open Access |
| spelling | doaj.art-00b2892838534fd6a5b6c51ae69e0cfd2022-12-21T22:01:38ZengElsevierComposites Part C: Open Access2666-68202020-10-012100039A kind of tunable Co/C microwave absorber derived from Co-ZIF-9 for lightweight and efficient microwave absorberAilun Zhao0Yan Wu1Lina Huang2College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR ChinaBeijing Aerospace Propulsion Institute, 100076 Beijing, PR ChinaGuangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Center for Civil Engineering, College of Civil Engineering, Shenzhen University, 518060 Shenzhen, Guangdong, PR China; Corresponding author.Herein, a novel rod-like Co/C composite has been synthesized successfully through an easy approach with a cobaltic metal-organic framework (Co-ZIF-9) as the precursor. After the process of high temperature pyrolysis, porous carbon implanted with governable cobalt nanoparticles was obtained. Due to the Co nanoparticles with the magnetic loss and the porous carbon contributing for the dielectric loss, the combination of the two with the interfacial polarization, the ferromagnetic composites inhibited improved electromagnetic wave absorption. The Co/C composite with 800 °C pyrolysis temperature demonstrated the biggest Co sizes as well as the best electromagnetic absorbing performance among the three samples. The Co/C composite at 800 °C shows thin thickness, lightweight and strong absorption performance, which may be owing to the interactive effects connecting dielectric and magnetic loss. In this work, an optimum value of reflection loss was reached at -44.3 dB with a layer thickness of 2.8 mm and meanwhile with 10 wt.% of the loading content.http://www.sciencedirect.com/science/article/pii/S2666682020300396ZIF-9Co NPsMicrowave absorberDielectric lossMagnetic loss |
| spellingShingle | Ailun Zhao Yan Wu Lina Huang A kind of tunable Co/C microwave absorber derived from Co-ZIF-9 for lightweight and efficient microwave absorber Composites Part C: Open Access ZIF-9 Co NPs Microwave absorber Dielectric loss Magnetic loss |
| title | A kind of tunable Co/C microwave absorber derived from Co-ZIF-9 for lightweight and efficient microwave absorber |
| title_full | A kind of tunable Co/C microwave absorber derived from Co-ZIF-9 for lightweight and efficient microwave absorber |
| title_fullStr | A kind of tunable Co/C microwave absorber derived from Co-ZIF-9 for lightweight and efficient microwave absorber |
| title_full_unstemmed | A kind of tunable Co/C microwave absorber derived from Co-ZIF-9 for lightweight and efficient microwave absorber |
| title_short | A kind of tunable Co/C microwave absorber derived from Co-ZIF-9 for lightweight and efficient microwave absorber |
| title_sort | kind of tunable co c microwave absorber derived from co zif 9 for lightweight and efficient microwave absorber |
| topic | ZIF-9 Co NPs Microwave absorber Dielectric loss Magnetic loss |
| url | http://www.sciencedirect.com/science/article/pii/S2666682020300396 |
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