Jump to main content
Jump to site search

Issue 6, 2013
Previous Article Next Article

Graphene oxide–chitosan composite hydrogels as broad-spectrum adsorbents for water purification

Author affiliations

Abstract

Water pollution is one of the most pervasive problems afflicting people throughout the world, while adsorption is the most widely used method to remove the contaminants from water. Here, in this paper, we report an eco-friendly graphene oxide–chitosan (GO–CS) hydrogel as a new type of adsorbent for water purification. The GO–CS hydrogels were prepared via self-assembly of GO sheets and CS chains. A three-dimensional network composed of GO sheets crosslinked by CS was found in GO–CS hydrogels. The GO–CS composite hydrogels showed high adsorption capacity towards different contaminants, including cationic and anionic dyes, as well as heavy metal ions. The mechanism of the dye adsorption was investigated with a spectral method, and an electrostatic interaction was found to be the major interaction between ionic dyes and the hydrogel. The influence of the hydrogel composition on the adsorption capacity towards different adsorbates was also studied. Finally, it was demonstrated that the GO–CS hydrogel can be used as column packing, to fabricate a column for water purification by filtration.

Graphical abstract: Graphene oxide–chitosan composite hydrogels as broad-spectrum adsorbents for water purification

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 23 Sep 2012, accepted on 22 Nov 2012 and first published on 23 Nov 2012


Article type: Paper
DOI: 10.1039/C2TA00406B
Citation: J. Mater. Chem. A, 2013,1, 1992-2001
  •   Request permissions

    Graphene oxide–chitosan composite hydrogels as broad-spectrum adsorbents for water purification

    Y. Chen, L. Chen, H. Bai and L. Li, J. Mater. Chem. A, 2013, 1, 1992
    DOI: 10.1039/C2TA00406B

Search articles by author