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A facile synthesis of bare biomass derived holey carbon absorbent for microwave absorption
- Source :
- Applied Surface Science. 544:148891
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Lightweight, inexpensiveness, easy synthesis, associated with high and broadband absorption are the intensive pursuit for advanced microwave absorbents. Herein, we employ a facile preparation to create holey structures on the wasted biomass-derived carbon materials by air-calcination. All of the carbon absorbents derived from wasted corn cobs, bagasse and grapefruit peels exhibit controlled holey structures on their surfaces, demonstrating the universality of this strategy. The obtained metal-free products are fabricated from bare wasted biomass, without any additional reagents addition. Benefiting from the holey structure generation, more incident microwaves can be consumed due to the increased surface areas and polarization centers for the microwave radiation. The performance measurements suggest the achieved sample could reach a minimum reflection loss value of −47.0 dB at 14.1 GHz and an effective absorption bandwidth (lower than −10 dB) of 5.5 GHz. It is anticipated that this facile holey generation method can be extended to more wasted biomass-derived carbon materials for more sustainable applications.
- Subjects :
- Materials science
business.industry
Reflection loss
General Physics and Astronomy
02 engineering and technology
Surfaces and Interfaces
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
Reagent
Optoelectronics
Structure generation
Absorption bandwidth
0210 nano-technology
business
Broadband absorption
Bagasse
Microwave
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 544
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........6f35c61fb8bfed8833f8d8e139e3d3f9