Preparation and characterization of sulfonated graphene-enhanced poly (vinyl alcohol) composite hydrogel and its application as dye absorbent

In this paper, sulfonated graphene (SG) were incorporated into the poly (vinyl alcohol) (PVA) networks to fabricate the SG/PVA (SP) composite hydrogel. The as-prepared SP hydrogel exhibited enhanced mechanical property with a small amount of SG into the PVA matrix. In the meantime, the SP hydrogel showed specific adsorption of cationic dyes, such as Methylene Blue (MB), Malachite Green (MG). Studies on the adsorption isotherm and kinetics of the...