Alves, Daniele C. da Silva and Healy, Bronach and Yu, Tian (2021) Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants. Materials, 14 (3655). ISSN 1996-1944

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Abstract

Graphene and its derivatives, especially graphene oxide (GO), are attracting considerable interest in the fabrication of new adsorbents that have the potential to remove various pollutants that have escaped into the aquatic environment. Herein, the development of GO/chitosan (GO/CS) composites as adsorbent materials is described and reviewed. This combination is interesting as the addition of graphene to chitosan enhances its mechanical properties, while the chitosan hydrogel serves as an immobilization matrix for graphene. Following a brief description of both graphene and chitosan as independent adsorbent materials, the emerging GO/CS composites are introduced. The additional materials that have been added to the GO/CS composites, including magnetic iron oxides, chelating agents, cyclodextrins, additional adsorbents and polymeric blends, are then described and discussed. The performance of these materials in the removal of heavy metal ions, dyes and other organic molecules are discussed followed by the introduction of strategies employed in the regeneration of the GO/CS adsorbents. It is clear that, while some challenges exist, including cost, regeneration and selectivity in the adsorption process, the GO/CS composites are emerging as promising adsorbent materials.

Item Type:	Article
Additional Information:	Funding: The authors would like to acknowledge funding provided by the Irish Research Council, award number GOIPG/2020/657 and Maynooth University. Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). Cite as: Alves, D.C.d.S.; Healy, B.; Yu, T.; Breslin, C.B. Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants. Materials 2021, 14, 3655. https://doi.org/10.3390/ma14133655
Keywords:	graphene oxide; chitosan; adsorbent; adsorption; environmental contaminants; magnetic adsorbents; 3D graphene; cyclodextrins; heavy metal ions; dyes;
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	15095
Identification Number:	https://doi.org/10.3390/ma14133655
Depositing User:	Dr. Carmel Breslin
Date Deposited:	06 Dec 2021 17:28
Journal or Publication Title:	Materials
Publisher:	MDPI AG
Refereed:	Yes
Funders:	Irish Research Council (IRC), Maynooth University
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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