The formation of supramolecular carbon nanofiber via amidation reaction on the surface of amino single walled carbon nanotubes for selective adsorption organic pollutants

Xuze Hu; Changjun Zou; Xuemei Zou

doi:10.1016/j.jcis.2019.01.130

The formation of supramolecular carbon nanofiber via amidation reaction on the surface of amino single walled carbon nanotubes for selective adsorption organic pollutants

J Colloid Interface Sci. 2019 Apr 15:542:112-122. doi: 10.1016/j.jcis.2019.01.130. Epub 2019 Jan 31.

Authors

Xuze Hu¹, Changjun Zou², Xuemei Zou¹

Affiliations

¹ School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, PR China.
² School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, PR China. Electronic address: changjunzou@126.com.

PMID: 30735886
DOI: 10.1016/j.jcis.2019.01.130

Abstract

The linear O-carboxymethyl-β-cyclodextrin polymer functionalized-amino single walled carbon nanotubes (LCMP-β-CD-ASWCNTs) supramolecular carbon nanofiber was prepared via amidation reaction. Surprisingly, AFM analysis indicated the width of the prepared well-defined supramolecular carbon nanofibers (SCNFs) was over 120 nm. Meanwhile, the height of the LCMP-β-CD-ASWCNTs supramolecular carbon nanofiber is within 26.5 nm, which is 1.36 times higher than that of pristine ASWCNTs. Additionally, SEM and HRTEM analysis indicated that the linear O-carboxymethyl-β-cyclodextrin polymer (LCMP-β-CD) molecules were anchored on amino single walled carbon nanotubes (ASWCNTs) and fully cover its surface. We observed that the specific surface area of LCMP-β-CD-ASWCNTs supramolecular carbon nanofibers was 679.3 m²/g, while that of pristine ASWCNTs was 113.5 m²/g. As expected, the specific surface area of LCMP-β-CD-ASWCNTs supramolecular carbon nanofibers was 6-fold larger compared with that of the pristine ASWCNTs. More importantly, LCMP-β-CD-ASWCNTs supramolecular carbon nanofiber possesses selective adsorption capacity for organic pollutants. Besides, the regeneration sorption and desorption experiments showed that the LCMP-β-CD-ASWCNTs supramolecular carbon nanofibers possessed good reproducibility and durability. Overall, these results indicated that the LCMP-β-CD-ASWCNTs supramolecular carbon nanofibers could potentially serve as selective adsorption material.

Keywords: Amino single walled carbon nanotubes; LCMP-β-CD-ASWCNTs supramolecular carbon nanofibers; Linear O-carboxymethyl-β-cyclodextrin polymer; Organic pollutants; Selective adsorption.