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Published in: Polymer Bulletin 12/2020

04-01-2020 | Original Paper

Strong alginate/reduced graphene oxide composite hydrogels with enhanced dye adsorption performance

Authors: Daijun Xiao, Minghong He, Yulan Liu, Lijun Xiong, Qiao Zhang, Lai Wei, Liang Li, Xianghua Yu

Published in: Polymer Bulletin | Issue 12/2020

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Abstract

The alginate/reduced graphene oxide composite hydrogels with hierarchical network structures were synthesized through the hydrothermal treatment of graphene oxide and alginate in an aqueous solution followed by ionically cross-linking of metal ions. The network of reduced graphene oxide was prepared via self-assembly of graphene nanosheets in the presence of alginate during the hydrothermal process; then, the polymer network of alginate was obtained by ionically cross-linking, forming the composite hydrogel. The effect of metal ions on the physical properties of the composite hydrogels was investigated. The prepared alginate/reduced graphene oxide composite hydrogel cross-linked by Fe3+ ions showed higher compression strength and lower swelling ratio. Moreover, due to the synergetic interaction between graphene and alginate, the composite hydrogels exhibited the improved dye adsorption performance, especially for cationic dyes. Even after ten adsorption/desorption cycles, the composite hydrogels can retain more than 90% dye adsorption capacity. The results indicated that the composite hydrogel with good stability, adsorption and regeneration ability could be a promising candidate for dye removal from waste aqueous solutions.

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Metadata
Title
Strong alginate/reduced graphene oxide composite hydrogels with enhanced dye adsorption performance
Authors
Daijun Xiao
Minghong He
Yulan Liu
Lijun Xiong
Qiao Zhang
Lai Wei
Liang Li
Xianghua Yu
Publication date
04-01-2020
Publisher
Springer Berlin Heidelberg
Published in
Polymer Bulletin / Issue 12/2020
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-020-03105-7

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