Cyclodextrin functionalized 3D-graphene for the removal of Cr(VI) with the easy and rapid separation strategy

Environmental Pollution
Zhe WangJing Chen

Abstract

As a useful heavy metal ion, chromium has seen its applications in various fields. While it is also a toxic contaminant in water and may cause serious threats to the environment and human health. To develop a novel material with good adsorption capacity and easy solid-liquid separation strategy was necessary and significant. In this paper, the β-cyclodextrin (β-CD) functionalized three-dimensional structured graphene foam (CDGF) was successfully synthesized with the facile and one-step hydrothermal method. The SEM, BET, XRD, FT-IR and XPS analysis were carried out and the results confirmed the successfully grafting of β-CD onto GF. The batch adsorption of Cr(VI) was also taken out and the CDGF possessed good selectivity compared with other metal ions at pH = 3. The adsorption capacity reduced gradually as the initial pH of the Cr(VI) solution grew higher, which was because the anionic species of Cr(VI) were partial to the positively charged surface of CDGF. The easy separation strategy of the CDGF was also demonstrated and the CDGF could be taken out easily with a tweezer after the adsorption of Cr(VI), which significantly simplified the separation procedure and reduced time. By comparing the FT-IR and XPD analysis results, the...Continue Reading

Citations

Oct 21, 2020·Environmental Science and Pollution Research International·Bingren TianJiayue Liu
Oct 30, 2020·ChemistryOpen·Shamik Chowdhury, Sharadwata Pan
Mar 7, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yuan LiuXiao Han
Aug 28, 2021·Environmental Science and Pollution Research International·Hefei SunYanqin Tian

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