Modulation of Charge Trapping by Island‐like Single‐Atom Cobalt Catalyst for Enhanced Photo‐Fenton‐Like reaction

Abstract Composites‐based photocatalysis relies on the interfacial electron transfer between metallic cocatalyst and photosensitizer (the semiconductor) to realize spatial separation of charge carriers. Herein, an ingenious heterojunction Co‐CN single atom catalysts (SACs) g‐C 3 N 4 is constructed for heterogeneous photo‐Fenton‐like reactions. Driven by built‐in electric field across heterojunctions, migration photogenerated carriers promoted, leading fast from SACs. Theoretical calculations transient absorption spectroscopy reveal modulated trapping in SA‐Co‐CN/g‐C heterostructure, resulting remarkably enhanced generation reactive oxygen species via peroxymonosulfate activation under light irradiation. This /PMS/vis system efficient oxidation various antibiotics with high removal efficiency (>98%), a wide operating pH range (pH 3–11) excellent stability long‐term operation. study provides new tactic rational design SACs‐based heterojunctions bridge catalysis, attaining superior photoredox activity coupling.