Preparation, Adsorption Properties and Microwave-Assisted Regeneration of Porous C/SiC Ceramics with a Hierarchical Structure

Porous C/SiC ceramics were prepared by chemical vapor reaction of SiO and porous C/C composites. The porous C/SiC ceramics presented a hierarchical structured consisted of carbon fibers, SiC layer, microspheres and nanowires. The density of porous C/C composites control the growth of SiC nanowires a...

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Bibliographic Details
Published in:Applied composite materials 2020-06, Vol.27 (3), p.131-148
Main Authors: Cuiyan, Li, Zhao, Xu, Haibo, Ouyang, Liyuan, Chang, Jianfeng, Huang, Yijun, Liu
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Carbon fibers
Ceramic fibers
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composite materials
Density
Industrial Chemistry/Chemical Engineering
Materials Science
Microspheres
Nanowires
Polymer Sciences
Pore size distribution
Porosity
Regeneration
Silicon carbide
Structural hierarchy
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Summary:Porous C/SiC ceramics were prepared by chemical vapor reaction of SiO and porous C/C composites. The porous C/SiC ceramics presented a hierarchical structured consisted of carbon fibers, SiC layer, microspheres and nanowires. The density of porous C/C composites control the growth of SiC nanowires and nanolayer, and influence the pore size distribution and specific surface area of the porous C/SiC ceramics. The C/SiC samples converting from the C/C composites with a density of 0.46 g/cm 3 possess the superior adsorption properties. The adsorption efficiency can reach 98.2% within 80 min, indicating that C/SiC samples have a promising adsorption property for MB from aqueous solution. Furthermore, the adsorption efficiency after five cycles microwave regeneration still reached 80.2%, which present excellent regeneration stability.
ISSN:0929-189X
1573-4897
DOI:10.1007/s10443-020-09801-x