Sandwich membranes based on PVDF-g-4VP and surface modified graphene oxide for Cu(II) adsorption

Yuexin Guo; Zhiqian Jia; Shuhuan Wang; Yabin Su; Hongcui Ma; Liguang Wang; Wei Meng

doi:10.1016/j.jhazmat.2019.05.044

Sandwich membranes based on PVDF-g-4VP and surface modified graphene oxide for Cu(II) adsorption

J Hazard Mater. 2019 Sep 5:377:17-23. doi: 10.1016/j.jhazmat.2019.05.044. Epub 2019 May 22.

Authors

Yuexin Guo¹, Zhiqian Jia², Shuhuan Wang³, Yabin Su⁴, Hongcui Ma³, Liguang Wang³, Wei Meng³

Affiliations

¹ School of Pharmacy, North China University of Science and Technology, Tangshan, 063210, PR China; College of Chemistry, Beijing Normal University, Beijing, 100875, PR China.
² College of Chemistry, Beijing Normal University, Beijing, 100875, PR China. Electronic address: zhqjia@bnu.edu.cn.
³ North China University of Science and Technology, Tangshan, 063210, PR China.
⁴ Tangshan Customs, Tangshan, 063000, PR China.

PMID: 31132677
DOI: 10.1016/j.jhazmat.2019.05.044

Abstract

UV photo-preactivation/thermally-induced grafting was employed for grafting 4-vinylpyridine (4-VP) on polyvinylidene fluoride (PVDF), and graphene oxide (GO) was modified with 4'-carboxy-2,2':6',2"-terpyridine (CTPy). Then sandwich PVDF-g-4VP/GO-CTPy/polytetrafluoroethylene (PTFE) membrane was fabricated for adsorption of Cu (II) as a model. The membrane formation, static adsorption thermodynamics, kinetics and dynamic adsorption/desorption were studied. The results showed that, the addition of polyethylene glycol (PEG 4000) as porogen can significantly increase the porosity and adsorption capacity of the membranes. The adsorption could be well described by the Langmuir model and pseudo-second-order kinetic model. The breakthrough volume and saturated volume increased with rising GO-CTPy contents. The adsorption capacity of sandwich membranes was much higher than that of mixed matrix membranes. The sandwich membrane also exhibited excellent reusability in dynamic adsorption/desorption cycles, demonstrating great potential in adsorption of trace Cu (II).

Keywords: Cu (II); GO; PVDF grafting; adsorption; sandwich adsorptive memebrane.

Publication types

Research Support, Non-U.S. Gov't