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

机译：γ辐照接枝法制备磺化活性炭纤维催化剂

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摘要

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 tnat 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 ℃ 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.
机译：磺化活性炭纤维催化剂（SACF）的制备方法是：将γ射线辐照将苯乙烯接枝到活性炭纤维（ACF）的表面上，辐照剂量为0.837 kGy / h，持续48 h，然后在室温下用氯磺酸将其磺化。扫描电子显微镜观察表明，ACF被共聚物薄层包裹，傅立叶转移红外光谱分析表明，磺酸基已成功引入ACF中。基于77 K氮吸附等温线的孔结构分析表明，接枝和磺化改性后，ACF的孔参数得以很好地保持。使用ACF前驱体在质量分数为20％的氯磺酸溶液中于80℃磺化SACF的合适条件为1.5 h，酸密度可达到1.47 mmol / g。磺化的ACF用作乙酸和乙醇酯化的催化剂。评估SACF的催化活性显示出明显优于其他典型催化剂的优势，其周转频率值为0.780 min〜（-1），约为Nafion的五倍。

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  • 来源
    《Journal of Materials Research》 |2012年第24期|3083-3089|共7页
  • 作者

    Qihan Li; Shuixia Chen; Linzhou Zhuang; Xiuzhu Xu; Haichao Li;

  • 作者单位

    PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,People's Republic of China;

    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;

    PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,People's Republic of China;

    PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,People's Republic of China;

    PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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