1：Experimental Design and Method Selection:

The study employed a hydrothermal calcination-ion exchange route to synthesize AB/BOB composites, with characterization using XRD, XPS, SEM, EDX, UV-vis DRS, BET, and electrochemical measurements. Photocatalytic activity was assessed by degrading methylene blue under visible light.

2：Sample Selection and Data Sources:

Samples included pure AgBr, pure BOB, and AB/BOB composites with mass ratios of 10%, 20%, and 25%. Methylene blue dye was used as the pollutant.

3：5%. Methylene blue dye was used as the pollutant. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Materials included bismuth nitrate pentahydrate, sodium hydroxide, silver nitrate, potassium bromide, glucose, ethylene glycol, methylene blue, and deionized water. Equipment included X-ray diffractometer (D/max-2500, Rigaku), FE-SEM (SUAPR55, Zeiss), XPS (Thermo ESCALAB 250XI), UV-vis spectrophotometer (UV-2450, Shimadzu), electrochemical analyzer (CHI660C), BET surface area analyzer (TriStar II 3020, Micromeritics), and a 500 W Xenon lamp.

4：Experimental Procedures and Operational Workflow:

BOB was prepared hydrothermally and calcined. AB/BOB composites were synthesized via ion exchange. Photocatalytic tests involved adding photocatalyst to MB solution, irradiating with visible light, and sampling at intervals to measure degradation. Active species trapping used scavengers like EDTA-2Na, BQ, and IPA.

5：Data Analysis Methods:

Degradation efficiency was calculated using UV-vis spectrometry. Kinetic constants were derived from first-order kinetics. Electrochemical measurements assessed photocurrent responses.