Preparation of Graphene Oxide and Graphene and Their Application in Sample Pretreatment

KeyWord:graphene oxide  graphene  preparation  sample pretreatment

Abstract:

      Graphene is an atomically thin honeycomb lattice of carbon atoms.It comprises a single layer of SP2-hybridized carbon atoms arrange in six-membered rings.As a new carbon-based nanomaterial after carbon nanotube£¬graphene could be considered as one of the ideal absorption materials with superior chemical stability£¬thermal stability and high specific surface area.Graphene oxide(GO) possesses rich oxygen-contained groups on its surface.Most of the graphene used nowadays is produced from the reduction of graphene oxide.In recent years£¬GO and graphene have been applied in the separation and enrichment of organic compounds£¬mental ions and biological molecules.In this paper£¬the preparation methods of GO and graphene and their applications in sample pretreatment techniques such as solid-phase extraction(SPE)£¬solid-phase microextration(SPME)£¬magnetic solid-phase extraction(MSPE)£¬stir bar sorptive extraction(SBSE) were reviewed.