Preparation of Expanded Graphite-based Carbon/Carbon Composites and Its Adsorption Properties on Phenol

Journal of Materials Engineering ›› 2010, Vol. 0 ›› Issue (11) : 21-25.

WANG Zhen-bang¹, CHEN Zhi-gang¹, LIU Cheng-bao¹, DUAN Xiao-tao¹, CHEN Hong¹, FU Meng²

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Abstract

Expanded graphite-based carbon/carbon composites(EGCs) were prepared by impregnation of expanded graphite(EG) in H₃PO₄/sucrose solution.The textural,structural characteristics of the composites were investigated by scanning electron microscopy(SEM) and nitrogen adsorption method.The results indicated that the worm-like particles were partly covered by pyrolytic carbons while the large open spaces among entangled worm-like particles were scarcely any,most of the activation carbon(ACs) covered the surface of interior pores of EGCs in the form of thin carbon layer with the thickness of 87nm.In the best condition of X_p=0.9,350℃ and 120min,the obtained sample had the highest surface area of 1948 m²/g.The phenol removal capabilities of EGCs were 24.8% higher than that of activated carbons which were prepared in the same condition.

Key words

EGCs / activation with H₃PO₄ / porous structure / adsorption capacity

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WANG Zhen-bang, CHEN Zhi-gang, LIU Cheng-bao, DUAN Xiao-tao, CHEN Hong, FU Meng. Preparation of Expanded Graphite-based Carbon/Carbon Composites and Its Adsorption Properties on Phenol[J]. Journal of Materials Engineering, 2010, 0(11): 21-25

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