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- Title
Preparation and characterization of activated carbon fibers from liquefied wood by KOH activation.
- Authors
Yuxiang Huang; Guangjie Zhao
- Abstract
Activated carbon fibers (ACFs) have been prepared from liquefied wood (Wliq) by chemical activation with KOH, with a particular focus on the effect of KOH/ fiber ratio in term of porous texture and surface chemistry. ACFs based on steam activation served as a blank for comparison. The properties of the ACFs were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), nitrogen adsorption/desorption, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results show that the KOH-activated ACFs have rougher surfaces and more amorphous structure compared with the blank. The pore development was significant when the KOH/fiber ratio reached 3, and achieved a maximum Brunauer-Emmett-Teller (BET) surface area of 1371 m2 g-1 and total pore volume (Vtot) of 0.777 cm3 g-1, of which 45.3% belong to mesopores with diameters of 2-4 nm, while the blank activated at the same temperature had a BET surface of 1250 m2 g-1 and Vtot of 0.644 cm3 g-1, which are mainly micropores. The surface functional groups are closely associated with the KOH/ fiber ratios. KOH-activated ACFs with KOH/fiber ratio of 3 have more oxygenated surface functional groups (C-O, C = O, -COOH) than the blank.
- Subjects
ACTIVATED carbon; CARBON fibers; X-ray photoelectron spectroscopy; MESOPORES; FOURIER transform infrared spectroscopy
- Publication
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2016, Vol 70, Issue 3, p195
- ISSN
0018-3830
- Publication type
Article
- DOI
10.1515/hf-2015-0051