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Porous structure and liquid‐phase adsorption properties of activated carbon aerogels
Author(s) -
Yang Wenjin,
Wu Dingcai,
Fu Ruowen
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26865
Subject(s) - adsorption , methylene blue , chemical engineering , activated carbon , mesoporous material , materials science , desorption , phenol , aerogel , phase (matter) , carbon fibers , porosity , chemistry , organic chemistry , composite material , catalysis , photocatalysis , composite number , engineering
In this article, activated carbon aerogels (ACAs) were prepared by CO 2 activation. Their pore structures were investigated by N 2 adsorption–desorption analysis. ACAs have excellent microporosity (e.g. 0.36 cm 3 /g) and mesoporosity (e.g. 1.72 cm 3 /g). Adsorption characteristics of phenol, methylene blue, I 2 , and VB 12 on ACAs in the liquid phase were studied by static adsorption experiments. Results showed that CO 2 activation process is an effective way to introduce micropores in carbon aerogels, which is enhanced with the increase of activation time. As a result, the adsorption capacities of the four mentioned adsorbates on ACAs were improved gradually with the increase of activation time. However, mesopore volume is also a factor on improving adsorption properties for the relatively giant molecules methylene blue and VB 12 . © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007