Abstract

Abstract It is important to develop self‐producing reactive oxygen species (ROSs) systems and maintain the continuous and effective degradation of organic pollutants. Herein, for the first time, a system of ultrasound‐treated CoS 2− x mixed with Fe 2+ is constructed to sustainably release singlet oxygen ( 1 O 2 ) for the effective degradation of various organic pollutants, including dyes, phenols, and antibiotics. Ultrasonic treatment produces defects on the surface of CoS 2 which promote the production of ROSs and the circulation of Fe 3+ /Fe 2+ . With the help of Co 4+ /Co 3+ exposed on the surface of CoS 2− x , the directional conversion of superoxide radical ( . O 2 − ) to 1 O 2 is realized. The CoS 2− x /Fe 2+ system can degrade organic pollutants efficiently for up to 30 days, which is significantly better than the currently recognized CuP x system (<3 days). Therefore, CoS 2− x provides a new choice for the long‐term remediation of organic pollutants in controlling large area river pollution.