1：Experimental Design and Method Selection:

The study involved synthesizing CdS nanostructures with different morphologies (1D, 2D, 3D) via solvothermal methods using specific precursors and solvents. Photocatalytic activities were evaluated under visible light irradiation for dye degradation and hydrogen evolution.

2：Sample Selection and Data Sources:

Samples included synthesized CdS nanostructures and erioglaucine dye solutions (10-50 ppm). Data were obtained from characterization techniques and photocatalytic experiments.

3：List of Experimental Equipment and Materials:

Equipment included autoclaves, ovens, magnetic stirrers, ultrasonic bath, photoreactor with CDM-R lamp, solar simulator, XRD, FESEM, TEM, UV-Vis spectrophotometer, BET analyzer, PL spectrophotometer, EIS workstation, and GC. Materials included cadmium nitrate tetrahydrate, thiourea, ethylenediamine, L-cysteine, ethylene glycol, triethylamine, erioglaucine, Na2S, Na2SO3, and scavengers (K2Cr2O7, AO, IPA, BQ).

4：Experimental Procedures and Operational Workflow:

Synthesis involved solvothermal reactions at specified temperatures and times. Photocatalytic tests included slurry preparation, dark adsorption, light irradiation, aliquot collection, centrifugation, and analysis. Sonication was applied before some tests. Hydrogen evolution used deoxygenated suspensions with hole scavengers.

5：Data Analysis Methods:

Data analysis included XRD pattern matching, BET surface area calculation, Tauc plot for bandgap, pseudo-first-order kinetics for degradation rates, and GC for hydrogen quantification.