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

Content Provider	Royal Society of Chemistry (RSC)
Author	Bai, Hua Chen, Libin Chen, Yunqiang Li, Lei
Copyright Year	2013
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.
Starting Page	1992
Ending Page	2001
Page Count	10
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	1
Issue Number	6
Journal	Journal of Materials Chemistry A
DOI	10.1039/c2ta00406b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Water pollution Adsorption Graphene Gel Self-assembly Heavy metals Dye Spectral method
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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