1：Experimental Design and Method Selection:

The study employs a soft-templating approach using evaporation-induced self-assembly (EISA) with an amphiphilic KLE-type diblock copolymer as the structure-directing agent. The sol-gel synthesis involves coassembly of hydrolyzing nitrate and chloride salt precursors to form mesoporous films via dip-coating.

2：Sample Selection and Data Sources:

Films of NdVO4, EuVO4, GdVO4, DyVO4, YVO4, and TmVO4 were produced on Si and quartz glass substrates. Doped variants with Eu3+, Dy3+, Er3+, or Tm3+ ions were also prepared.

3：List of Experimental Equipment and Materials:

Hydrated rare-earth nitrate salts (e.g., Gd(NO3)3·6H2O), VOCl3, EtOH, 2-methoxyethanol, KLE diblock copolymer, Si substrates. Equipment includes TEM (Philips CM30-ST), SEM (Carl Zeiss MERLIN), AFM (Veeco Instruments), XRD (PANalytical X'Pert PRO), Raman spectrometer (Bruker SENTERRA), ToF-SIMS (IONTOF TOF.SIMS 5), XPS (VG Instruments), GISAXS and SAXS (HASYLAB beamline BW4), Kr-physisorption (Quantachrome Autosorb-1-MP), UV-Vis-NIR spectrophotometer (PerkinElmer Lambda 900), and photoluminescence setup with monochromator and photomultiplier.

4：Experimental Procedures and Operational Workflow:

Precursors were mixed in EtOH, stirred, combined with copolymer solution, and dip-coated onto substrates at controlled humidity. Films were dried at 150°C, heated to 300°C for mesostructure stabilization, and crystallized at ≥500°C. Characterization involved microscopy, spectroscopy, scattering, and adsorption measurements. Photocatalytic tests used methylene blue degradation under UV light.

5：Data Analysis Methods:

Data were analyzed using software like UNIFIT 2005 for XPS, linear regression for kinetic analysis, and various techniques for structural and compositional assessment.