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Preparation of a sulfonated activated carbon fiber catalyst with γ-irradiation-induced grafting method

Published online by Cambridge University Press:  19 November 2012

Qihan Li ,
Shuixia Chen ,
Linzhou Zhuang ,
Xiuzhu Xu  and
Haichao Li
Qihan Li
Affiliation:
PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
Shuixia Chen*
Affiliation:
PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China; and DSAPM Lab, Materials Science Institute, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
Linzhou Zhuang
Affiliation:
PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
Xiuzhu Xu
Affiliation:
PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
Haichao Li
Affiliation:
PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: cescsx@mail.sysu.edu.cn
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Abstract

A sulfonated activated carbon fiber catalyst (SACF) was prepared through γ-irradiation-induced grafting of styrene onto the surface of activated carbon fiber (ACF) with an irradiation dose of 0.837 kGy/h for 48 h that was then sulfonated with chlorosulfonic acid under mild reaction conditions. Scanning electron microscopy observation showed that the ACF was wrapped by a thin layer of copolymer, and Fourier transfer infrared spectroscopy analysis indicated that sulfonic acid groups were successfully introduced onto the ACF. Pore structure analysis based on nitrogen adsorption isotherms at 77 K demonstrated that pore parameters of ACF were well maintained after the process of grafting and sulfonation modification. Proper conditions for the SACF preparation were sulfonated at 80 °C for 1.5 h in the 20% mass percentage of chlorosulfonic acid solution using ACF precursor, whose acid density could reach 1.47 mmol/g. The sulfonated ACF was used as catalyst for the esterification of acetic acid and ethanol. Evaluation of the catalytic activity of SACF showed evident advantages over other typical catalyst, with a turnover frequency value of 0.780 min−1, about five times higher than Nafion.

Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 24 , 28 December 2012 , pp. 3083 - 3089
Copyright
Copyright © Materials Research Society 2012

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