A magnetic graphene hybrid functionalized with beta-cyclodextrins for fast and efficient removal of organic dyes

Xiaodong Liu; Liang Yan; Wenyan Yin; Liangjun Zhou; Gan Tian; Junxin Shi; Zhiyong Yang; Debao Xiao; Zhanjun Gu; Yuliang Zhao

doi:10.1039/C4TA00753K

A magnetic graphene hybrid functionalized with beta-cyclodextrins for fast and efficient removal of organic dyes†

Xiaodong Liu,‡^ab Liang Yan,‡*^a Wenyan Yin,^a Liangjun Zhou,^ac Gan Tian,^a Junxin Shi,^a Zhiyong Yang,^d Debao Xiao,*^b Zhanjun Gu*^a and Yuliang Zhao*^a

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* Corresponding authors

^a CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
E-mail: yanliang@ihep.ac.cn, zjgu@ihep.ac.cn, zhaoyuliang@ihep.ac.cn

^b Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
E-mail: debao.xiao@ysu.edu.cn

^c College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China

^d School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

A β-cyclodextrin (β-CD) functionalized magnetic graphene hybrid (mGO-β-CD) has been prepared and its application as an adsorbent for the removal of organic dyes has been investigated. Magnetic graphene hybrids (mGOs) were first synthesized via a chemical precipitation method, and then β-CDs were applied to further functionalize the resultant mGO hybrid. The results demonstrate that the as-prepared mGO-β-CD hybrid exhibits greatly enhanced adsorption performance in water. Acid fuchsin and Rhodamine 6G, the typical dye pollutants, can be effectively removed from their solutions by the mGO-β-CD hybrid. The maximum adsorption capability of the mGO-β-CD hybrid is several times, even hundreds of times higher than that of the reported carbonaceous materials. Moreover, ca. 90% of the dye removal efficiency can be retained after six adsorption–desorption cycles. In addition, the mGO-β-CD hybrid exhibits negligible toxicity toward the normal cells. Conclusively, the resultant mGO-β-CD hybrid proves to be a magnetically separable, efficient and non-toxic adsorbent for dye removal.

Journal of Materials Chemistry A

A magnetic graphene hybrid functionalized with beta-cyclodextrins for fast and efficient removal of organic dyes†

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A magnetic graphene hybrid functionalized with beta-cyclodextrins for fast and efficient removal of organic dyes

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