▎ 摘　　要

In this study, graphene oxide (GO)-based two-dimensional molecular brush was fabricated by grafting polyacrylamide onto GO nanosheets for efficient removal of Pb2+ and Cu2+ from water media. Owing to the rich oxygen and nitrogen functional groups in the composites, the synthetic GO two-dimensional molecular brush can get the maximum adsorption capacity of 268.4 mg/g for Pb2+ and 127.2 mg/g for Cu2+, respectively. Moreover, the interspaces between the stacked two-dimensional molecular brushes provide fast pathways for the diffusion of heavy metal ions. As a result, GO-based two-dimensional molecular brush can reach the adsorption equilibrium within 60 min. These results indicated that the synthetic GO-based two-dimensional molecular brush is a promising adsorbent to separate heavy metal ions from water media.