1：Experimental Design and Method Selection:

The study involved synthesizing Sn3O4 nanostructures via microwave-assisted hydrothermal method, depositing them on Ti substrates to form thin films, and evaluating their photocatalytic and photoelectrocatalytic activities for dye degradation under visible light. Theoretical models include semiconductor photocatalysis principles.

2：Sample Selection and Data Sources:

Acid Yellow 17 dye was used as the pollutant model. Samples were prepared in aqueous solutions with Na2SO4 as electrolyte.

3：List of Experimental Equipment and Materials:

Equipment includes microwave-assisted hydrothermal autoclave, FEG-SEM, XRD, TEM, zeta analyzer, potentiostat/galvanostat, UV-Vis spectrophotometer, TOC analyzer, LC-MS/MS, and a homemade glass reactor with a Hg lamp. Materials include SnF2, NaOH, ethanol, titanium foils, PVB, toluene, methanol, 1-pentanol, Na2SO4, H2SO4, and AY17 dye.

4：Experimental Procedures and Operational Workflow:

Synthesis of Sn3O4 involved dissolving SnF2 in water-ethanol, adjusting pH to 6, hydrothermal treatment at 150°C for 2 hours, centrifugation, washing, and drying. Thin films were prepared by spin coating Sn3O4-PVB solution on Ti foils and annealing. Characterization included SEM, XRD, TEM, zeta potential, and photoelectrochemical measurements. Degradation experiments were conducted in a reactor with controlled pH, bias potential, and light conditions, monitoring discoloration and mineralization over time.

5：Data Analysis Methods:

Data analysis involved kinetic rate calculations using pseudo-first-order models, statistical evaluation of degradation efficiency, and identification of intermediates via LC-MS/MS.