1：Experimental Design and Method Selection:

A green synthetic strategy was employed using okra mucilage as a reducing and stabilizing agent to fabricate ZnO nanoparticles without additional solvents, catalysts, or templates. The reaction involved mixing zinc acetate solution with mucilage extract, heating, and calcination.

2：Sample Selection and Data Sources:

Fresh okra crops were purchased locally, and zinc acetate dihydrate and dye powders (methylene blue, rhodamine B, Congo red, methyl orange) were obtained from commercial suppliers.

3：List of Experimental Equipment and Materials:

Equipment included FTIR spectrophotometer (Jasco-FT/IR-4100), UV-Vis spectrophotometer (Jasco-v-550), FT-Raman spectrometer (Bruker MultiRam), XRD diffractometer (Rigaku), zeta potential analyzer (Brookhaven PALS), XPS instrument (Physical Electronics PHI 5000 VersaProbe III), FESEM (Zeiss), HRTEM (JEOL/JEM 2100), EDAX system, thermogravimetric analyzer (Perkin Elmer STA 6000), photoreactor (Luzchem LZC-4X), and LC-MS (Waters UPLCTQD). Materials included zinc acetate dihydrate, okra mucilage, and organic dyes.

4：Experimental Procedures and Operational Workflow:

Okra mucilage was extracted in water, mixed with zinc acetate solution, heated at 170°C, calcined at 700°C, and characterized. Photocatalytic degradation tests were performed by adding ZnO NPs to dye solutions under UV light, with sampling at intervals to measure absorbance changes.

5：Data Analysis Methods:

XRD patterns were analyzed using Debye-Scherrer formula for particle size, UV-Vis spectra for band gap calculation via Tauc plot, and degradation efficiency calculated using absorbance changes. LC-MS confirmed degradation products.