| MOF-derived yolk-shell Ni/C architectures assembled with Ni@C core-shell nanoparticles for lightweight microwave absorbents | |
| Wang, Xiaolei1; Geng, Qiyao1; Shi, Guimei1; Zhang, Yajing2; Li, Da3,4 | |
| Corresponding Author | Wang, Xiaolei(xlwang@alum.imr.ac.cn) ; Li, Da(dali@imr.ac.cn) |
| 2020-11-07 | |
| Source Publication | CRYSTENGCOMM
 |
| ISSN | 1466-8033 |
| Volume | 22Issue:41Pages:6796-6804 |
| Abstract | Yolk-shell Ni/C microspheres composed of Ni@C core-shell nanoparticles were successfully fabricated by decomposing a Ni-based metal-organic framework (Ni-MOF) at 500 degrees C and 600 degrees C. The Ni-MOF with a yolk-shell structure was prepared by a solvothermal method with an appropriate molar ratio of Ni(NO3)(2)center dot 6H(2)O to C9H6O6 in the presence of PVP. The degree of crystallization of Ni and C was improved by increasing the pyrolysis temperature, which resulted in enhanced complex permittivity and optimized impedance matching of Ni/C microspheres for damping microwave. Meanwhile, the attenuation coefficient of Ni/C microspheres increased with the increment in pyrolysis temperature. The yolk-shell Ni/C microspheres obtained at 600 degrees C exhibited the optimal reflection loss (RL) reaching-39 dB with a bandwidth of 3.8 GHz (RL <-10 dB) at a thin matching thickness of 1.8 mm. The integrated bandwidth can achieve 12.3 GHz covering Ku-band (12-18 GHz), X-band (8-12 GHz), and most of C-band (5.7-8 GHz) with an appropriate thickness of 1.4-3.9 mm. Such excellent microwave absorption performance can be attributed to the synergistic effect of the magnetic and dielectric losses of Ni/C microspheres due to natural resonance, dipolar polarization and multiple interfacial polarizations at a unique yolk-shell interface, achieving the optimization of impedance matching and microwave attenuation. This work demonstrates that Ni/C microspheres with a desirable yolk-shell structure are potential candidates for the application in microwave absorption field. |
| Funding Organization | National Natural Science Foundation of China ; plan for promoting innovative talents of Education Department of Liaoning Province ; Shenyang Youth Science and Technology Project |
| DOI | 10.1039/d0ce01242d |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51601120] ; National Natural Science Foundation of China[51971221] ; plan for promoting innovative talents of Education Department of Liaoning Province[LCR2018015] ; Shenyang Youth Science and Technology Project[RC200444] |
| WOS Research Area | Chemistry ; Crystallography |
| WOS Subject | Chemistry, Multidisciplinary ; Crystallography |
| WOS ID | WOS:000583363700005 |
| Publisher | ROYAL SOC CHEMISTRY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/141302 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Xiaolei; Li, Da |
| Affiliation | 1.Shenyang Univ Technol, Sch Environm & Chem Engn, Shenyang 110870, Peoples R China 2.Shenyang Univ Chem Technol, Coll Chem Engn, Shenyang 110142, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Xiaolei,Geng, Qiyao,Shi, Guimei,et al. MOF-derived yolk-shell Ni/C architectures assembled with Ni@C core-shell nanoparticles for lightweight microwave absorbents[J]. CRYSTENGCOMM,2020,22(41):6796-6804. |
| APA | Wang, Xiaolei,Geng, Qiyao,Shi, Guimei,Zhang, Yajing,&Li, Da.(2020).MOF-derived yolk-shell Ni/C architectures assembled with Ni@C core-shell nanoparticles for lightweight microwave absorbents.CRYSTENGCOMM,22(41),6796-6804. |
| MLA | Wang, Xiaolei,et al."MOF-derived yolk-shell Ni/C architectures assembled with Ni@C core-shell nanoparticles for lightweight microwave absorbents".CRYSTENGCOMM 22.41(2020):6796-6804. |
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