Novel magnetic biosorbent based on clicking alkyne-functionalized glucose onto azidemodified graphene oxide

Magnetic glucose-functionalized graphene nanosheets (GNS) were prepared and theirapplication in the removal of methylene blue was investigated. First, Water-soluble GNS werefabricated via functionalization of graphene oxide (GO) glucose on the basal plane using ClickReaction. To graft saccharides onto the plane and edges of GO, two approaches were used. In thefirst approach, GO was reacted with sodium azide to introduce azide groups on the plane. Then, itwas treated with alkyne-modified glucose. In the next approach, we attached 1, 3-diazideoprop-2-olonto the edges of GO and it was subsequently clicked with alkyne-glucose. Sugar-grafted GO sheetswere reduced by sodium ascorbate during click-coupling reaction which is an advantage for thisreaction. Finally to prepare magnetic nanocomposites,Fe3O4 nanoparticles were deposited on sweetGNS using co-precipitation.The resulted the magnetic biosorbents responded quickly to an externalmagnetic field and exhibited efficient adsorption towards methylene blue.

کلیدواژه ها:

Sweet Graphene Nanosheets ، Magnetic Biosorbent ، Click Reaction ، Dye Removal