Preparation and Absorption Capacity Evaluation of Composite Hydrogels via Graphene Oxide and Multi-Amine Molecules

In this paper, some composite hydrogels via graphene oxide (GO) and multi-amine molecules have been designed and prepared from the self-assembly of GO in presence of multi-amine molecules including diethylenetriamine (DETA) and triethylenetetramine (TETA). These obtained composite hydrogels have been characterized by different kinds of methods. The micro/nano structures in nanocomposite hydrogel were characterized by morphological investigation. The next adsorption properties demonstrate that these designed and synthesized GO-based composite hydrogels can act as efficient absorbents for dyes removal from wastewater in well accordance with the pseudo-second-order model. The good dye adsorption capacity of present hydrogels could be closely attributed to the GO segments, while the amine molecules were incorporated to assist the gelation formation of GO sheets. The present results from the dye-adsorbed hydrogels show new explorations for GO-based composites in applications of wastewater treatment and harmful dye removal.