Dynamic construction of self-assembled supramolecular H12SubPcB-OPhCOOH/Ag3PO4 S-scheme arrays for visible photocatalytic oxidation of antibiotics

Achieving efficient photocatalytic oxidation of antibiotics represents a key challenge, which can be overcome by developing dynamic attachment strategies between supramolecular and semiconducting catalysts. Herein, we utilize hydrogen bonding and van der Waals forces to dynamically connect self-assembled SubPc-1 dimers and Ag3PO4 semiconductor catalysts for photocatalytic oxidation of antibiotics, which is systematically demonstrated by spectroscopic measurements and theoretical calculations. The degradation efficiency of SubPc-1/Ag3PO4 supramolecular nanoarrays for tetracycline and oxytetracycline is 93.54% and 94.9% under 30 min visible light irradiation, respectively. The superior activity and excellent stability of supramolecular arrays are demonstrated to be more attributed to the dynamic hydrogen bonding and van der Waals connection between SubPc-1 and Ag3PO4. This work reveals a potential for preparing specific S-scheme heterojunction photocatalysts based on dynamic attachment supramolecular and semiconductor catalysts.

Automated summary

Efficient photocatalytic oxidation of antibiotics can be achieved by developing dynamic attachment strategies between supramolecular and semiconducting catalysts. In this study, hydrogen bonding and van der Waals forces are used to connect self-assembled SubPc-1 dimers and Ag3PO4 semiconductor catalysts, forming supramolecular nanoarrays. The superior activity and stability of these arrays are attributed to the dynamic hydrogen bonding and van der Waals connection. This work reveals the potential for preparing specific S-scheme heterojunction photocatalysts based on dynamic attachment supramolecular and semiconductor catalysts.