1：Experimental Design and Method Selection:

The study used a one-step anodic oxidation method to synthesize CuxO nanoarrays on nanoporous copper (np-Cu) derived from dealloyed Ti50Cu50 amorphous ribbon. The rationale was to create a composite with high surface area and good conductivity for enhanced photocatalytic activity.

2：Sample Selection and Data Sources:

Samples were prepared from Ti50Cu50 amorphous ribbons, which were dealloyed to form np-Cu, followed by anodic oxidation in 0.2 M KOH solution at 0.6 V and 293 K for varying times (20, 60, 120 minutes).

3：2 M KOH solution at 6 V and 293 K for varying times (20, 60, 120 minutes). List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included a direct current voltage-regulated power supply for anodization, X-ray diffraction (XRD, DaVinci D8 Focus), Transmission electron microscopy (TEM, JEM-2100F), Scanning electron microscope (SEM, JSM-7100) with EDS, X-ray photoelectron spectroscopy (XPS, K-Alpha), UV–Vis spectrophotometer (UV-6100), and a 500 W Xe lamp. Materials included Ti50Cu50 amorphous ribbon, KOH, Rhodamine B (RhB), H2O2 (30 wt%).

4：Experimental Procedures and Operational Workflow:

Dealloying of Ti50Cu50 ribbon to form np-Cu, anodic oxidation in KOH solution, characterization using XRD, TEM, SEM, EDS, XPS, and evaluation of photocatalytic activity by degrading RhB under UV light with H2O2 addition, measuring degradation using UV-Vis spectrophotometry.

5：Data Analysis Methods:

Data were analyzed using XRD for structural identification, TEM and SEM for morphological analysis, EDS and XPS for compositional analysis, and UV-Vis spectrophotometry for photocatalytic performance evaluation, including degradation rates and band gap calculations.