Heterogeneous adsorption of activated carbon nanofibers synthesized by electrospinning polyacrylonitrile solution.
This study focuses on the adsorption properties of activated carbon nanofibers (CNFs) fabricated by electrospinning polyacrylonitrile solutions dissolved in dimethylformamide, followed by heat treatment at high activation temperatures (700, 750, 800 degrees C). The samples were characterized by BET, SEM, and XRD. In addition, the adsorption energy distribution functions of CNFs were analyzed by using the generalized nonlinear regularization method. Comparative analysis of energy distribution functions provided significant information on the energetic and structural heterogeneities of CNFs. Furthermore, an investigation of adsorption equilibrium and kinetics of methylene blue (MB) and congo red (CR) revealed that the adsorption capacity and kinetics of MB are much higher and faster than that of CR on a given sample. Our experimental and theoretical results suggest that the CNFs used in this work may be widely used as an adsorbent.
Lee
Jae-Wook
JW
Department of Environmental and Chemical Engineering, Seonam University, Namwon 590-170, Korea.
Kang
Hyun-Chul
HC
Shim
Wang-Geun
WG
Kim
Chan
C
Yang
Kap-Seung
KS
Moon
Hee
H
D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D003224:Congo Red / Q000494:pharmacology; D004058:Diffusion; D004563:Electrochemistry; D007700:Kinetics; D008751:Methylene Blue / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011312:Pressure; D013499:Surface Properties; D013696:Temperature
D000180:Acrylic Resins; D037742:Nanotubes, Carbon; C010504:polyacrylonitrile; D003224:Congo Red; D008751:Methylene Blue