▎ 摘　　要

Graphene and graphene doped with CeO2 were prepared and characterized by FTIR, BET, XRD, SEM and elemental analysis. Adsorption of 2-nitrophenol by graphene and cerium doped graphene (CeO2@graphene nanocomposite) was studied. The impact of different parameters such as effect of adsorbent dosage, contact time and pH of solution were studied. Two common kinetic models, pseudo-first-order and pseudo-second-order were used to describe the adsorption kinetics. The resultant kinetic data were well fitted by a pseudo second-order model. Freundlich and Langmuir models were used to study the adsorption isotherms. Comparing with graphene, adsorption capacity of CeO2@graphene toward 2-nitrophenol was enhanced significantly. The maximum adsorption capacity of graphene and CeO2@graphene were determined 80.64 and 142 mg g(-1), respectively. Graphene and CeO2@graphene had surface area of 27 and 95 m(2) g(-1), respectively. The thermodynamic results indicated the spontaneity and exothermic nature of the adsorption. CeO2@graphene nanocomposite showed to be a highly efficient adsorbent and could be easily used for separation purposes.