1：Experimental Design and Method Selection:

A low-temperature chemical reduction approach was used to synthesize the RGA/AgBr/Ag composite, involving the reduction of graphene oxide with NaHSO3, modification with CTAB, and immersion in AgNO3 solution to load AgBr and Ag nanoparticles. The design aimed to inhibit aggregation and promote electron transfer.

2：Sample Selection and Data Sources:

Escherichia coli (E. coli) bacteria were used for disinfection tests, with initial concentrations of 10^6–10^7 CFU/mL. Samples included bare AgBr, RGA, and RGA/AgBr/Ag for comparison.

3：List of Experimental Equipment and Materials:

Materials included CTAB, NaHSO3, AgNO3, ethanol, HCl, H2SO4, KMnO4, H2O2, DMF, graphite powder, and deionized water. Equipment included FE-SEM (FEI Nova NANOSEM 230), TEM (JEOL JEM 2010 EX), XRD (Bruker D8 Advance), XPS (Thermo Scientific ESCA Lab 250), PL spectrophotometer (Edinburgh Analytical Instrument F980), ICP-OES (OPTIMA 8000), electrochemical workstation (CHI-660D), confocal microscope (Nikon A1), and a 300W Xe arc lamp (PLS-SXE 300C).

4：Experimental Procedures and Operational Workflow:

Synthesis involved preparing GO, RGH, and RGA/AgBr/Ag through chemical reduction and freeze-drying. Characterization used SEM, TEM, XRD, XPS, PL, and electrochemical measurements. Photocatalytic disinfection tests were conducted under visible light irradiation with E. coli, involving sampling, dilution, plating, and counting colonies. Recycling tests involved washing and reusing the aerogel.

5：Data Analysis Methods:

Data were analyzed using plate count method for bacterial survival, electrochemical techniques for charge transfer, and spectroscopic methods for material properties. Statistical analysis was implied through repeated experiments and control tests.