1：Experimental Design and Method Selection:

The study used microwave irradiation for rapid exfoliation of graphite, followed by compression into flexible sheets for SERS applications. Adsorption isotherms and kinetics models (Langmuir, Freundlich, pseudo-first-order, pseudo-second-order) were employed to analyze dye removal.

2：Sample Selection and Data Sources:

Natural graphite flakes (NGF) were used as the starting material. Dye solutions of Rhodamine 6G (R6G) were prepared with concentrations ranging from 10^-3 to 10^-14 M.

3：List of Experimental Equipment and Materials:

Equipment includes a domestic microwave oven (SAMSUNG CE103VD, 800 W), FESEM (ULTRA 55 FESEM; Carl Zeiss), XRD (Rich Seifert Iso-Debyeflex 202 diffractometer), BET surface area analyzer (Autosorb1C system, Quantachrome, USA), FT-IR spectrometer (Nicolet Nexus 670), UV-Vis spectrophotometer (Shimadzu UV-3600), and Raman spectrometer (LABRAM-HR). Materials include perchloric acid (HClO4), sodium nitrate (NaNO3), and silver nanoparticles for enhancement.

4：Experimental Procedures and Operational Workflow:

Synthesis of EG involved mixing NGF, HClO4, and NaNO3 in a weight ratio (

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0.15), microwave irradiation for 50 s at 800 W, resulting in EG. FGS was fabricated by compressing EG powder without binders. Adsorption experiments were conducted in batch with magnetic stirring at 300 rpm, varying pH and contact time. SERS measurements were performed using drop-cast method on FGS.

7：15), microwave irradiation for 50 s at 800 W, resulting in EG. FGS was fabricated by compressing EG powder without binders. Adsorption experiments were conducted in batch with magnetic stirring at 300 rpm, varying pH and contact time. SERS measurements were performed using drop-cast method on FGS. Data Analysis Methods:

5. Data Analysis Methods: Data were analyzed using isotherm and kinetic models, with statistical fitting (e.g., R^2 values). Enhancement factors for SERS were calculated based on integrated intensities.