Cargando…
Significant promotion of porous architecture and magnetic Fe(3)O(4) NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption
Carbonaceous composites with tailored porous architectures and magnetic Fe(3)O(4) components derived from walnut shells were fabricated by a solvothermal method and used as effective microwave absorbers. The porous composites were obtained by two carbonization processes at different temperatures and...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9080601/ https://www.ncbi.nlm.nih.gov/pubmed/35539664 http://dx.doi.org/10.1039/c8ra00913a |
_version_ | 1784702823977451520 |
---|---|
author | Gao, Shengshuai An, Qingda Xiao, Zuoyi Zhai, Shangru Shi, Zhan |
author_facet | Gao, Shengshuai An, Qingda Xiao, Zuoyi Zhai, Shangru Shi, Zhan |
author_sort | Gao, Shengshuai |
collection | PubMed |
description | Carbonaceous composites with tailored porous architectures and magnetic Fe(3)O(4) components derived from walnut shells were fabricated by a solvothermal method and used as effective microwave absorbers. The porous composites were obtained by two carbonization processes at different temperatures and an etching process using potassium hydroxide. The introduction of a developed porous architecture inside the resulting materials distinctly improved the microwave absorption performance. Moreover, investigations revealed that the Fe(3)O(4) nanoparticles were chemically bonded and uniformly decorated on the porous framework without aggregation. Owing to the combined advantages of the lightweight conductive biochar-like porous framework with a favorable dielectric loss and Fe(3)O(4) nanoparticles with magnetic loss features, these newly fabricated porous carbonaceous composites exhibited excellent microwave absorption performance. A reflection loss (RL) of −51.6 dB was achieved at a frequency of 13.6 GHz. Besides, the effective absorption (below −10 dB) bandwidth reached 5.8 GHz (from 11.9 to 17.7 GHz) at an absorber thickness of only 2 mm. These results indicated that this type of porous Fe(3)O(4)–biochar composite derived from biomass substances and prepared via an easy-to-handle process can be considered as attractive candidates for the design and manufacture of high-efficiency microwave-absorbing materials. |
format | Online Article Text |
id | pubmed-9080601 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90806012022-05-09 Significant promotion of porous architecture and magnetic Fe(3)O(4) NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption Gao, Shengshuai An, Qingda Xiao, Zuoyi Zhai, Shangru Shi, Zhan RSC Adv Chemistry Carbonaceous composites with tailored porous architectures and magnetic Fe(3)O(4) components derived from walnut shells were fabricated by a solvothermal method and used as effective microwave absorbers. The porous composites were obtained by two carbonization processes at different temperatures and an etching process using potassium hydroxide. The introduction of a developed porous architecture inside the resulting materials distinctly improved the microwave absorption performance. Moreover, investigations revealed that the Fe(3)O(4) nanoparticles were chemically bonded and uniformly decorated on the porous framework without aggregation. Owing to the combined advantages of the lightweight conductive biochar-like porous framework with a favorable dielectric loss and Fe(3)O(4) nanoparticles with magnetic loss features, these newly fabricated porous carbonaceous composites exhibited excellent microwave absorption performance. A reflection loss (RL) of −51.6 dB was achieved at a frequency of 13.6 GHz. Besides, the effective absorption (below −10 dB) bandwidth reached 5.8 GHz (from 11.9 to 17.7 GHz) at an absorber thickness of only 2 mm. These results indicated that this type of porous Fe(3)O(4)–biochar composite derived from biomass substances and prepared via an easy-to-handle process can be considered as attractive candidates for the design and manufacture of high-efficiency microwave-absorbing materials. The Royal Society of Chemistry 2018-05-23 /pmc/articles/PMC9080601/ /pubmed/35539664 http://dx.doi.org/10.1039/c8ra00913a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Gao, Shengshuai An, Qingda Xiao, Zuoyi Zhai, Shangru Shi, Zhan Significant promotion of porous architecture and magnetic Fe(3)O(4) NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption |
title | Significant promotion of porous architecture and magnetic Fe(3)O(4) NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption |
title_full | Significant promotion of porous architecture and magnetic Fe(3)O(4) NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption |
title_fullStr | Significant promotion of porous architecture and magnetic Fe(3)O(4) NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption |
title_full_unstemmed | Significant promotion of porous architecture and magnetic Fe(3)O(4) NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption |
title_short | Significant promotion of porous architecture and magnetic Fe(3)O(4) NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption |
title_sort | significant promotion of porous architecture and magnetic fe(3)o(4) nps inside honeycomb-like carbonaceous composites for enhanced microwave absorption |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9080601/ https://www.ncbi.nlm.nih.gov/pubmed/35539664 http://dx.doi.org/10.1039/c8ra00913a |
work_keys_str_mv | AT gaoshengshuai significantpromotionofporousarchitectureandmagneticfe3o4npsinsidehoneycomblikecarbonaceouscompositesforenhancedmicrowaveabsorption AT anqingda significantpromotionofporousarchitectureandmagneticfe3o4npsinsidehoneycomblikecarbonaceouscompositesforenhancedmicrowaveabsorption AT xiaozuoyi significantpromotionofporousarchitectureandmagneticfe3o4npsinsidehoneycomblikecarbonaceouscompositesforenhancedmicrowaveabsorption AT zhaishangru significantpromotionofporousarchitectureandmagneticfe3o4npsinsidehoneycomblikecarbonaceouscompositesforenhancedmicrowaveabsorption AT shizhan significantpromotionofporousarchitectureandmagneticfe3o4npsinsidehoneycomblikecarbonaceouscompositesforenhancedmicrowaveabsorption |