Sulfur-free exfoliated graphite with large exfoliated volume: Preparation, characterization and its adsorption performance

Qi Zhao; Xiuwen Cheng; Juan Wub; Xiujuan Yu

Journal of Industrial and Engineering Chemistry, Vol.20, No.6, 4028-4032, November, 2014

DOI10.1016/j.jiec.2014.01.002 Export Citation

Sulfur-free exfoliated graphite with large exfoliated volume: Preparation, characterization and its adsorption performance

Qi Zhao¹, Xiuwen Cheng^{2, 3}, Juan Wub³, and Xiujuan Yu^{2, 3, †}

¹National Engineering Research Center of Urban Water Resource, Harbin Institute of Technology, Huanghe Road 73, Nangang District, Harbin 150090, PR China
²Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, College of Heilongjiang Province, Xuefu Road 74, Nangang District, Harbin 150080, PR China
³Department of Environmental Science and Engineering, Heilongjiang University, Xuefu Road 74, Nangang District, Harbin 150080, PR China

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Sulfur-free exfoliated graphite (EG) with large exfoliated volume (760 mL g-1) was prepared through chemical oxidation, followed by microwave exfoliation. SEM results indicated that well-developed network pores in the worm-like structure of EG could be clearly observed. XPS results displayed that some functional groups were yielded on the surface of the as-prepared EG. Moreover, the capacity of EG was evaluated by the adsorption of rodamine B and 4-chlorophenol aqueous solution. Results showed that EG exhibited high adsorption capacity for RhB and 4-CP, which could be attributed to the functional groups and well-developed network pores in the worm-like EG.

Keywords:Exfoliated graphite;Microwave exfoliation;Adsorption capacity;4-Chlorophenol;Rodamine B

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