Heterojunction-based and structure-engineered construction of Cs3Bi2Br9/g-C3N4/PDMS photocatalytic flexible s with three-dimensional interpenetrating uniform pores

Abstract

Using photocatalysts for the degradation of antibiotics in aqueous environments is a highly promising strategy for achieving green and sustainable development. Although significant improvements have been made in photocatalyst reuse, the recycling rate is still unsatisfactory. Herein，we prepared a photocatalyst Cs3Bi2Br9/g-C3N4 and incorporated it into PDMS using a three-dimensional fiber porous structure (PCC) prepared by electrospinning sacrificial templates. This structure served to protect the catalyst without limiting its degradation performance. The photocurrent measurements and electrochemical impedance spectroscopy results are consistent with those of the oxytetracycline hydrochloride (OTC-HCl) removal test. The electron spin resonance results confirmed the formation of •OH and •O2− under visible light irradiation. This way of using the film to protect the catalyst for photocatalytic degradation may open up new possibilities for the remediation of environmental pollution.