1：Experimental Design and Method Selection:

The study employs a green synthesis approach using Zante currants extract for the reduction of graphene oxide, based on the presence of reducing sugars and polyphenolic compounds. The Hummers method is used for GO synthesis, and characterization techniques include SEM, TEM, Raman, FTIR, XRD, and UV-Vis spectroscopy.

2：Sample Selection and Data Sources:

Graphite powder is used as the starting material for GO synthesis. Zante currants are purchased from the market for extract preparation. All chemicals are analytical grade from Sigma Aldrich.

3：List of Experimental Equipment and Materials:

Equipment includes Perkin Elmer FT-IR Spectrometer, X-ray diffractometer (Rigaku Corporation), Perkin Elmer Lambda 35 UV-Vis spectrophotometer, LabRAM Raman spectrometer, Field Emission Scanning Microscope (SIGMA VP, Zeiss), and HR-TEM (F30 S-Twin, Technai). Materials include graphite, hydrogen peroxide, potassium permanganate, sulphuric acid, nitric acid, ethanol, Zante currants, cellulose membrane, de-ionized water, and ammonia solution.

4：Experimental Procedures and Operational Workflow:

Zante currants extract is prepared by saturating ZC in deionized water at 95°C, followed by filtration. GO is synthesized via the Hummers method involving oxidation of graphite with KMnO4 and H2SO4. Reduction of GO is carried out by adding ZC extract and ammonia to GO suspension, heating at 95°C for 48 hours, followed by washing.

5：Reduction of GO is carried out by adding ZC extract and ammonia to GO suspension, heating at 95°C for 48 hours, followed by washing. Data Analysis Methods:

5. Data Analysis Methods: Characterization data are analyzed using standard techniques: XRD for crystal structure, Raman for defect analysis, FTIR for functional groups, UV-Vis for electronic transitions, SEM and TEM for morphology.