1：Experimental Design and Method Selection:

A facile hydrothermal synthesis method was used to prepare Co3(PO4)2/Ag3PO4 composites. Photocatalytic activity was evaluated under simulated sunlight irradiation (320 nm<λ<680 nm) using a 300 W Xe lamp with an IR filter.

2：Sample Selection and Data Sources:

Ofloxacin (OFX) and methyl orange (MO) were used as target pollutants. Escherichia coli (E. coli) was used to assess antimicrobial activity.

3：List of Experimental Equipment and Materials:

Equipment includes X-ray diffractometer (Rigaku D/max 2000), XPS instrument (VG-ADES 400), UV-vis-NIR spectrometer (Cary 500), FESEM (XL-30 ESEM FEG), HPLC (Shimadzu LC-20A), UV-vis spectrophotometer (Persee T6-1650E), microplate reader (Multiskan MS), and a self-made quartz photoreactor. Materials include AgNO3, Co(NO3)2·6H2O, Na2HPO4·12H2O, ultrapure water, and various chemicals from suppliers like Tianjin Chemical Reagent Factory.

4：Experimental Procedures and Operational Workflow:

Synthesis involved dissolving precursors, hydrothermal treatment at 120°C for 12 h, washing, and drying. Photocatalytic tests involved irradiating pollutant solutions with catalyst, sampling at intervals, filtering, and analyzing concentrations. Antimicrobial assays involved culturing E. coli, preparing dilutions, incubating, and measuring absorbance.

5：Data Analysis Methods:

Degradation efficiency calculated using η = (C0 - Ct)/C0 × 100%. Antimicrobial activity assessed using growth inhibition equations and EC50 values analyzed with Graph-Pad Prism software.