Electrospun PAN-Based Carbon Nanofibers for Aqueous Boron Recovery

Designed for the recovery of aqueous boron, a critical element with various industrial applications, the use of carbon fibers as an effective adsorbent for boron in aqueous solutions was explored, and the changes in carbon fibers were investigated during repeated boron adsorption and desorption. In...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2024, 41(1), 286, pp.299-307
Main Authors: Park, Ji Wan, Kim, Su Young, Jeong, Tae Uk, Han, Do Young, Kim, Da Eun, Huh, Seong, Won, Yong Sun
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Biotechnology
Boron
Carbon fibers
Catalysis
Chemistry
Chemistry and Materials Science
Electrospinning
Graphene
Industrial applications
Industrial Chemistry/Chemical Engineering
Materials Science
Nitrogen
Original Article
Recovery
Regeneration
Room temperature
Surface chemistry
X ray photoelectron spectroscopy
화학공학
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Summary:Designed for the recovery of aqueous boron, a critical element with various industrial applications, the use of carbon fibers as an effective adsorbent for boron in aqueous solutions was explored, and the changes in carbon fibers were investigated during repeated boron adsorption and desorption. In this research, prepared PAN fibers by electrospinning were carbonized into nitrogen-doped carbon fibers. The resulting fiber mats undergo boron adsorption in boric acid solution and subsequent regeneration in HCl solution, and these processes repeat multiple times to assess the reusability of carbon fibers. SEM analysis confirmed the successful electrospinning of PAN fibers and their carbonized ones, while EDS and XPS analyses determined the presence of doped nitrogen on the graphene-like surface and the consequential effective boron adsorption. Then ICP-OES showed that the boron adsorption was completed within ~ 1 h to an equilibrium capacity even at room temperature, and the capacity increased with the regeneration of fibers, also confirmed by SEM and BET analyses in that the specific surface area increased along with the physical breakage and shattering of fibers during regeneration. In conclusion, the carbon fibers proposed in this study are applicable for aqueous boron recovery with their operative reusability.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-023-00001-4