Studies on pore structures and surface functional groups of pitch-based activated carbon fibers

Soo-Jin Park; Yu-Sin Jang; Jae-Woon Shim; Seung-Kon Ryu

doi:10.1016/s0021-9797(02)00081-4

Studies on pore structures and surface functional groups of pitch-based activated carbon fibers

J Colloid Interface Sci. 2003 Apr 15;260(2):259-64. doi: 10.1016/s0021-9797(02)00081-4.

Authors

Soo-Jin Park¹, Yu-Sin Jang, Jae-Woon Shim, Seung-Kon Ryu

Affiliation

¹ Advanced Materials Division, Korea Research Institute of Chemical Technology, PO Box 107, Yusong, Taejon 305-600, South Korea. psjin@krict.re.kr

PMID: 12686173
DOI: 10.1016/s0021-9797(02)00081-4

Abstract

The present study concerns the physical activation and chemical oxidation of pitch-based activated carbon fibers (ACFs) as ways to improve the adsorption properties. The surface oxides of the ACFs studied were determined by Boehm's titration and the pore structures were studied by the BET method with N(2)/77 K adsorption. Also, the adsorption properties of the ACFs were investigated with chromium ion adsorption by different adsorption models. As a result, it was observed that carboxyl groups were largely created after nitric acid treatment on ACFs. The affinity for chromium ions increases with increasing specific surface area, micropore volume, and surface functionalities of ACFs as the activation time increases.