1：Experimental Design and Method Selection:

The study used a low-temperature precipitation method for ZnS synthesis and a phase inversion method for PVDF pellet preparation and ZnS immobilization. Photocatalytic degradation experiments were conducted in a batch reactor under UV irradiation.

2：Sample Selection and Data Sources:

Methylene blue (MB) solutions at different concentrations were used as the organic contaminant. ZnS nanoparticles and PVDF pellets were synthesized in the lab.

3：List of Experimental Equipment and Materials:

Equipment includes SEM (Nova-SEM, FEI Company), TEM (Talos F200X, FEI Company), XRD (D8 Advanced, Bruker Corporation), DLS (Microtrac Inc.), TGA-DSC (Q600, TA Instrument), FTIR (Bruker VERTEX 80 V), UV/Vis spectrophotometer (Varian Cary 100, Agilent Technologies), XPS, and a photocatalytic reactor with a UV lamp (Philips TUV SLM). Materials include Zn(NO3)2·6H2O (Sigma Aldrich), thioacetamide (Daejung Chemical), PVDF (Alfa Aesar), DMF (SHOWA), and deionized water.

4：Experimental Procedures and Operational Workflow:

ZnS nanoparticles were synthesized by heating a precursor solution to 90°C under N2, then centrifuged and dried. PVDF pellets were prepared by dissolving PVDF in DMF, degassing, and dropping into a coagulation bath. For immobilization, PVDF solution was added to a ZnS suspension and precipitated. Characterization involved SEM, TEM, XRD, DLS, TGA, FTIR, UV/Vis, XPS, and adsorption tests. Photocatalytic tests were done in a reactor with UV irradiation, stirring, and MB concentration measurement.

5：Data Analysis Methods:

Adsorption data were analyzed using Freundlich isotherm model. Photocatalytic degradation kinetics were fitted to a pseudo-first-order model. Statistical analysis included R2 values for model fitting.