Journal
CARBON
Volume 44, Issue 10, Pages 1884-1890Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2006.02.028
Keywords
carbon fibers; activation; adsorption; adsorption properties
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Predominant mesopores were added to pitch-based activated carbon fiber (0.7 nm of average pore width) by Ca(NO3)(2)-impregnated chemical activation. The influence of the concentration of calcium nitrate solution, reactivation temperature and reactivation time on the mesopore development of ACF were examined. The development of mesopores in the reactivated ACF was evidenced by an explicit hysteresis of N-2 adsorption isotherm at 77 K. The pore volume ratio of mesopores to micropores reached to 3-4. The addition of predominant mesopores to ACF enhanced the liquid phase adsorption rate of methylene blue by more than 10 times. (c) 2006 Elsevier Ltd. All rights reserved.
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