1：Experimental Design and Method Selection:

The study utilized the microwave-assisted hydrothermal (MAH) method for the synthesis of ZnO particles and their composites with ionic liquids (ILs). The photocatalytic activities of the composites were tested for RhB degradation under visible radiation.

2：Sample Selection and Data Sources:

ZnO particles were synthesized and then incorporated with two ILs, BMI.Cl and C16MI.Cl, at different concentrations. The samples were characterized using various techniques including XRD, Raman spectroscopy, N2 adsorption-desorption isotherm measurements, FEG-SEM, TEM, UV–Vis absorption spectroscopy, PL spectroscopy, and XPS.

3：List of Experimental Equipment and Materials:

Panasonic? modified microwave oven (model MN-S46B), Rigaku detector for XRD, iHR550 spectrometer for Raman spectroscopy, TriStar II 3020 V 1.03 instrument for N2 adsorption-desorption isotherm measurements, ZEISS model 105 DSM940A spectrometer for FEG-SEM, FEI Tecnai F20 microscope for TEM, Cary 5G spectrophotometer for UV–Vis absorption spectroscopy, Thermal Jarrel-Ash Monospec 27 cm monochromator for PL measurements, Branson ultrasound bath (model 1510), and Omicron-SPHERA station for XPS analysis.

4：03 instrument for N2 adsorption-desorption isotherm measurements, ZEISS model 105 DSM940A spectrometer for FEG-SEM, FEI Tecnai F20 microscope for TEM, Cary 5G spectrophotometer for UV–Vis absorption spectroscopy, Thermal Jarrel-Ash Monospec 27 cm monochromator for PL measurements, Branson ultrasound bath (model 1510), and Omicron-SPHERA station for XPS analysis. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The synthesis involved dissolving Zn(NO3)2 in deionized water, adding KOH solution, heating in a microwave reactor, washing, and drying. The ILs were incorporated into ZnO particles by mixing with ethanol and water, sonicating, and heating. Photocatalytic degradation tests were performed by dispersing samples in RhB solutions under visible light and monitoring degradation over time.

5：Data Analysis Methods:

The photocatalytic degradation data was analyzed using UV–Vis absorption spectroscopy, and the rate constants were calculated assuming pseudo-first-order kinetics. Structural and morphological characterizations were performed using XRD, Raman spectroscopy, and electron microscopy.