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GU Cheng, CHEN Zhigang, LIU Chengbao, et al. Preparation of expanded graphite-based C/C composites by vacuum impregnation and its adsorption properties on formaldehyde[J]. Acta Materiae Compositae Sinica, 2013, 30(4): 108-115.
Citation: GU Cheng, CHEN Zhigang, LIU Chengbao, et al. Preparation of expanded graphite-based C/C composites by vacuum impregnation and its adsorption properties on formaldehyde[J]. Acta Materiae Compositae Sinica, 2013, 30(4): 108-115.
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Preparation of expanded graphite-based C/C composites by vacuum impregnation and its adsorption properties on formaldehyde

  • 1.

    School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;

  • 2.

    The Key Environmental and Functional Materials Laboratory of Jiangsu Province, Suzhou University of Science & Technology, Suzhou 215011, China;

  • 3.

    School of Chemistry and Biological Engineering, Suzhou University of Science & Technology, Suzhou 215011, China

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  • Corresponding author:

    陈志刚,教授,主要从事微-纳(米)孔材料的制备技术、微结构控制及其吸附-催化-光降解有机污染物的研究 E-mail:czg@ujs.edu.cn

  • Received Date: June 18, 2012
  • Revised Date: December 10, 2012
    Abstract
  • The expanded graphite-based C/C composites were prepared by vacuum impregnation while expanded graphite (EG), sucrose and phosphoric acid solution were selected as starting materials. The effect of phosphoric acid/sucrose mass ratio (Xp), sucrose concentration on pore structure and specific surface area surface area of the composites was investigated by SEM, nitrogen adsorption/desorption techniques, TG and TEM. The surface chemical functional groups of composite material were characterized by FTIR and Boehm titration method. And the formaldehyde adsorption ability was investigated. The results indicate that there are a lot of micropores, a certain amount of meso-and macropores. The abandant oxygen-containing functional groups on the surface of the composites are benefit to the adsorption of formaldehyde. Under the condition of Xp=1.0, 30% sucrose concentration(mass fraction), the C/C composite is obtained with the highest surface area of 2112 m2/g and total pore volume of 1.08 mL/g. The formaldehyde removal capabilities of expanded graphite-based C/C composites are 26.9% higher than that of activated carbons which were prepared under the same condition.
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