▎ 摘　　要

Heterogeneous Fenton catalyst with high activity and excellent durability is highly demanded for efficient removal of organic pollutants via well-known Fenton reaction. In this work Fe/Fe3C nanoparticles loaded on iron/nitrogen-doped graphene (Fe/Fe3C@Fe/N-Graphene) were synthesized via spontaneous oxidative polymerization of dopamine (DA) on graphene oxide (GO) surface in the presence of iron (III) chloride, followed by thermal annealing. The Fenton catalytic performance of as-prepared Fe/Fe3C@Fe/NGraphene was evaluated by degrading rhodamine 6G (Rh 6G) as a model organic pollutant. It is found that as-prepared catalyst demonstrates good activity with a rate constant of 0.080 min(-1) under optimal hydrogen peroxide (H2O2) concentration and catalyst dosage. Moreover, its catalytic activity shows negligible decrease even after 13 successive cycles, exhibiting excellent catalytic durability. The possible mechanism behind the improved Fenton catalytic activity and durability was further discussed. (C) 2017 Elsevier B.V. All rights reserved.