화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.105, 74-82, January, 2022
DOI10.1016/j.jiec.2021.09.011  Export Citation
Enhancing adsorption efficiencies of organic molecules through covalently bonded structures of magnetic carbon nanoparticles
Quy Son Luu1, Uyen Thi Do1, Dokyung Kim1, Jiwon Kim1, Donghyeok Jo1, Quynh Thi Nguyen2, and Youngbok Lee1, 2, †
  • 1Department of Bionano Technology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, South Korea
  • 2Department of Applied Chemistry, Hanyang University, Ansan 15588, South Korea
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This study introduces a facile method for synthesizing covalently bonded magnetic carbon nanoparticles (MCNs) in which carboxylic acid-functionalized activated carbon nanospheres (ACN-COOH) are connected with amine-terminated iron oxide nanoparticles (NPs) (Fe3O4-NH2) via a carbodiimide crosslinking reaction. The adsorption characteristics of the developed magnetic nanoparticles (ACN-Fe3O4) were investigated using a standard cationic dye (methylene blue, MB). Two additional MCNs (multi-core and core@shell structures) were also prepared, and their adsorption performances were extensively compared. The developed ACN-Fe3O4 material thoroughly utilizes the strengths of activated carbon and Fe3O4 themselves, exhibiting large specific surface areas (708.4 m2/g) and strong magnetic properties (40.3 emu/g), resulting in high adsorption capacity (349.5 mg/g) and recycling efficiency (76 % of adsorption performance after four cycles). In addition, a study of the mechanism reveals that pore-filling processes are dominant with minor contributions from electrostatic interactions, p.p interactions, and n. p interactions. The developed covalently bonded magnetic carbon nanoparticles (ACN-Fe3O4) can thus be considered as competent adsorbents with the potential to compensate for the drawbacks of contemporary MCNs, such as, low adsorption capacity, and weak magnetic properties.
Keywords:Magnetic carbon nanomaterials;Porous materials;Pore filling;Interfacial interaction;Adsorption kinetics & mechanism;Biocompatibility
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