This study synthesized graphene oxide (GO)/zinc oxide (ZnO)/silver (Ag) composite materials and investigated their photocatalytic degradation performance for ciprofloxacin (CIP) under visible light irradiation. GO/ZnO/Ag composites with different ratios were prepared via an impregnation and chemical reduction method and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The results demonstrated that under optimal conditions (20 mg/L CIP concentration, 15 mg catalyst dosage, GO/ZnO-3%/Ag-doping ratio, and pH 5), the GO/ZnO/Ag composite exhibited the highest photocatalytic activity, achieving a maximum degradation rate of 82.13%. This catalyst effectively degraded ciprofloxacin under light irradiation, showing promising potential for water purification applications.

With the unprecedented progress of biomedical nanotechnology in the past few decades, traditional drug delivery systems (DDSs) have been incorporated into intelligent DDSs with stimulus responsive characteristics. Graphene oxide (GO) and Chitosan (CS) have excellent physical, chemical, mechanical, and optical properties, and their synergistic effects have attracted widespread attention in the biomedical field. In this review, we focus on the physicochemical characteristics of GO, CS, and GO/CS composites, as well as the research progress of DDS types based on GO/CS.