Imprinted modified S-scheme heterojunction with high selectivity for inhibiting CdS photocorrosion by coating with poly-o-phenylenediamine

Imprinted modified POPD/CdS S-scheme heterojunction possesses good selective degradation ability and CdS photocorrosion resistance. • IM-POPD/CdS S-scheme heterojunction is obtained by microwave polymerization technique. • Imprinted modified POPD layer inhibits CdS photo-corrosion. • S-scheme heterojunction formed by POPD and CdS improves the photocatalytic activity. • Imprinted modified POPD layer achieves the orientation degradation of DFM in different water environments. Imprinted modified poly-o-phenylenediamine (POPD)/CdS S-scheme heterojunction (IM-POPD/CdS) was synthesized by microwave polymerization method, which showed excellent CdS photocorrosion resistance and photocatalytic degradation performance towards danofloxacin mesylate (DFM). Interestingly, owing to the presence of imprinted cavities on IM-POPD/CdS, IM-POPD/CdS can selectively adsorb and degrade DFM. IM-POPD/CdS exhibited a good orientation degradation ability in different water environments. More importantly, due to the coating of the imprinted modified POPD layer and the consumption of h + in the CdS valence band by e - on the POPD, the photocorrosion of CdS is greatly inhibited, and its secondary pollution is reduced. This study provides a new idea for photocorrosion resistant functional heterojunction materials and an exemplary way for the effective directional degradation of target pollutants.