To aid with the environmental crisis, a new iron oxychloride/reduced graphene oxide (FeOCl/rGO) heterojunction has been successfully synthesized. The heterojunction shows enhanced photo-Fenton catalytic activity and stability relative to those of FeOCl under mild conditions (neutral solution and natural light). The surface area, optical adsorption, and electronegativity of FeOCl/rGO are larger than those of FeOCl, and these properties contribute to the enhanced catalytic perform- [a]