Preparation of graphene/zeolite composites and the adsorption of pollutants in water

Resumo

Based on the advantages of graphene and zeolite, respectively, the graphene/zeolite composites with core-shell structure were synthesized. The features of the composites were characterized and experimental conditions were used to evaluate the potential of graphene/zeolite composites in removing copper ions Cu²⁺ and methyl orange (MO) in single and binary systems. In a single system, the adsorption of Cu²⁺ and MO are in accordance with the Freundich and Langmuir model, respectively, with maximum adsorption capacities at 39.06 and 2.71 mg g^–1. For the binary system, the coexistence of Cu²⁺ and MO increases the maximum adsorption capacity of the composite material compared with the single one and Langmuir model can better describe the co-adsorption behavior of Cu²⁺-MO binary mixture by the composites.