1：Experimental Design and Method Selection:

The study used a one-pot polyol synthesis method with PEO-PPO-PEO as a surfactant to prepare AuZnO composite nanoparticles with varying Au loadings. Characterization techniques included XRD, EDX, SAED, TEM, HRTEM, FTIR, UV-Vis, PL, XPS, TGA, and photocatalytic degradation tests.

2：Sample Selection and Data Sources:

Samples S1, S2, and S3 were synthesized with different precursor amounts (Au(OOCCH3)3 and Zn(acac)2) to achieve nominal compositions of Au0.03(ZnO)1.47, Au0.075(ZnO)1.425, and Au0.15(ZnO)1.35, respectively. Pure Au and ZnO nanoparticles were also prepared for comparison.

3：03(ZnO)47, Au075(ZnO)425, and Au15(ZnO)35, respectively. Pure Au and ZnO nanoparticles were also prepared for comparison. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included XRD (X'Pert Pro), TEM (JEM-100II), EDX, SAED, ICP-OES (ICAP6200), UV-Vis spectrophotometer (Hitachi U4100), PL spectrophotometer (Hitachi F7000), FTIR spectrometer (Avatar 360), XPS (Thermo ESCALAB250XI), TGA (NETZSCH STA449F5), UV lamp (Philips 36W), visible light lamp (HSX-F/UV 50W), and UV-Vis absorption spectra (TU-1900). Materials included gold(III)acetate, zinc(II)acetylacetonate, PEO-PPO-PEO, octyl ether, 1,2-hexadecanediol, hexane, ethanol, and Rhodamine B.

4：0). Materials included gold(III)acetate, zinc(II)acetylacetonate, PEO-PPO-PEO, octyl ether, 1,2-hexadecanediol, hexane, ethanol, and Rhodamine B. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Synthesis involved heating mixtures in a three-necked flask to specific temperatures (125°C and 280°C) with holding times, followed by centrifugation, washing, and drying. Characterization steps included structural, morphological, elemental, optical, and thermal analyses. Photocatalytic tests involved adding catalyst to RhB solution, stirring in dark for adsorption equilibrium, irradiating with UV or visible light, sampling at intervals, centrifuging, and measuring RhB concentration via UV-Vis spectroscopy.

5：Data Analysis Methods:

Data were analyzed using software like Nano measurer for particle size distribution, Scherrer equation for crystallite size from XRD, and statistical methods for photocatalytic efficiency calculations.