1：Experimental Design and Method Selection:

The synthesis of WO3-rGO nanocomposite was carried out using pulsed laser ablation in liquids (PLAL) method, which involves the reduction of graphene oxide and anchoring of nanostructured WO3 on reduced graphene oxide simultaneously.

2：Sample Selection and Data Sources:

100 mg of WO3 nanoparticles (99.9% purity) was suspended in 10 ml of deionized water mixed with 5.0% by weight of monolayer graphene oxide suspension.

3：9% purity) was suspended in 10 ml of deionized water mixed with 0% by weight of monolayer graphene oxide suspension. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Pulsed laser beam of 355 nm wavelength, 280 mJ/pulse energy, and beam diameter of 0.8 nm; Shimadzu XRD-600 for XRD analysis; scanning electron microscopy (SEM) for surface morphology; ESCALAB‐250Xi for XPS analysis; Jasco V-670 double beam spectrophotometer for optical characterization; spectrofluorometer 8500 for photoluminescence spectra.

4：8 nm; Shimadzu XRD-600 for XRD analysis; scanning electron microscopy (SEM) for surface morphology; ESCALAB‐250Xi for XPS analysis; Jasco V-670 double beam spectrophotometer for optical characterization; spectrofluorometer 8500 for photoluminescence spectra. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The mixture was irradiated for 30 min by the pulsed laser beam. The photocatalytic performance was evaluated by degrading methylene blue (MB) dye in water under visible light radiation. Supercapacitor devices were fabricated using spray coating technique and characterized by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS).

5：Data Analysis Methods:

The extent of degradation was estimated using the intensity of the absorption spectrum recorded around 664 nm. Specific capacitances were calculated using the equation Cs = 2 × I × Δt/(w × ΔV).