Atomically dispersed Co-Mn dual sites anchored in photoresponsive carbon nitride mediated peroxymonosulfate activation for elimination of petroleum hydrocarbon in water

The atomic dispersed heterogeneous catalysts are attracting much research interests. Recently, multiple active sites (two, three or even more) exhibits all-round characters for regulation of intrinsic active sites. However, depth exploration of multiple active sites in persulfate activation etc fenton-like advanced oxidation process is still in its infancy. Herein, binary atomic dispersed active sites anchored in visible-light-responsive carbon nitride Co-Mn/CN catalyst was designed representatively. The characterization and theory calculation clarified the coordination environment of metallic center atoms and confirms its CoN4-MnN2 moiety. The unique coordinated geometry on the one hand highlights the synergy effect between photocatalysis and peroxymonosulfate (PMS) activation, on the other hand promotes the form of metastable metal-PMS complex and subsequent activation process. Furthermore, the catalysts present efficient application to purify the oil spill pollutes water considering water quality, pH and durability etc. This work sheds light on the rational regulation of diatomic sites in photo-Fenton-like catalysts.