Porous structure and liquid-phase adsorption properties of activated carbon aerogels

✍ Scribed by Wenjin Yang; Dingcai Wu; Ruowen Fu

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 246 KB
• Volume: 106
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.26865

✦ Synopsis

Abstract

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