Graphitic carbon nitride anchored Fe single atom towards the highly efficient degradation of dyes under visible light

Photo-Fenton reaction proved to be a practical method to degrade industrial dye wastewater. But it suffers from the problem of low atom utilization and secondary pollution derived from the leaching of metal active sites during reaction. Herein, a strong organometallic complex-support interaction combined with mild heat-treatment strategy is proposed to synthesize Fe single atom in situ growth on exfoliated graphitic carbon nitride (ECN). The resulting [email protected] catalyst presents highly accessible single-atom Fe site and superior catalytic performance with almost complete RhB degradation within 30 min. The degradation efficiency of RhB remains 99% even after 8 cycles, which is attributed to the large surface area, highly exposed Fe site as well as the synergistic effect between FeNx and ECN support.