Selective regulation of peroxydisulfate-to-hydroxyl radical for efficient in-situ chemical oxidation over Fe-based metal-organic frameworks under visible light

•Selectively regulating PDS-to-∙OH conversion was achieved over irradiated MIL-100(Fe).•CUSs and coordinated H2O played pivotal roles in PDS-to-∙OH conversion.•The mechanism of PDS-to-∙OH conversion over irradiated MIL-100(Fe) was investigated.•PDS/MIL-100(Fe) exhibited high stability and reusability for pollutant degradation.