0D/2D hybrid Ni - Fe bi-metal oxides quantum dots/graphitic carbon nitride nanosheets for photo-Fenton system degradation of tetracycline hydrochloride

Abstract

Hybrid materials composed of 0D/2D multi-metal active sites have garnered significant attention as photocatalysts for photogenerated Fenton reactions due to their abundant surface active sites and high charge mobility. However, such 0D/2D hybrid materials often suffer from phenomena such as the agglomeration of metal active sites. In this study, a novel dual metal oxide quantum dot/carbon nitride nanosheets (NiFeO (3:7) QDs/CNNSs) hybrid was successfully synthesized through a simple one^-step calcination method. In a photocatalytic Fenton system, the NiFeO (3:7) QDs/CNNSs composite exhibited a degradation efficiency of 93.59% for tetracycline hydrochloride (TC) within 90 minutes. The rapid electron transfer pathways formed between NiFeO quantum dots and CNNSs effectively enhanced charge transfer and charge separation capabilities. Furthermore, the presence of NiFeO QDs facilitated the generation of ·O₂^- at the interface of CNNSs, significantly improving its photocatalytic degradation performance. Therefore, the NiFeO quantum dots combined with graphite^-like carbon nitride nanosheets show great potential as an efficient and stable photocatalyst for the degradation of organic pollutants in practical applications. This property suggests significant applicability of this composite material in the field of environmental protection, providing new solutions for enhancing wastewater treatment efficiency and reducing environmental pollution.