Abstract: Graphene,a two-dimensional carbon material only with a structure of honeycomb lattice which having a single-atom-thick layer,has attractive much research in many fields including energy,environment,military and aerospace,due to its fantastic properties of specific surface,photoelectric effect and mechanical strength.Functionalizing endows graphene favorable tailors such as the structure,physicochemical and photoelectrical properties,extending the detecting range of chemical species.It was discussed that the recent advancements in the functionalizing of graphene utilizing the methods of chemical modification,nanoparticle decoration and polymer hybrid,and the applications of functional graphene materials in improved gas sensing properties including sensitivity and selectivity.Finally,the remaining challenges and perspectives of this enticing field were provided.
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