1：Experimental Design and Method Selection:

The study employed a hydrothermal method to prepare titanate nanostructures with different morphologies (nanosheets, nanotubes, nanowires) and characterized them using various techniques to assess their photocatalytic activity against crystal violet dye under UV light.

2：Sample Selection and Data Sources:

Titanate nanostructures were synthesized from TiO2 anatase bulk powder using NaOH solution and hydrothermal treatment at 160°C for different durations (6, 20, 48 hours). Crystal violet dye was used as the model pollutant.

3：List of Experimental Equipment and Materials:

Equipment included a teflon-lined stainless steel autoclave, JEOL-JEM 2100 HRTEM, PANalytical Empyrean XRD, Zetasizer Nano-ZS90, Micromeritics TriStar II BET analyzer, Shimadzu UV-3600 spectrophotometer, UV lamp (wavelength 100–280 nm, 16 watt), and Thermo Scientific Evolution 600 UV-Vis spectrophotometer. Materials included TiO2 anatase powder, NaOH, HCl, and crystal violet dye.

4：Experimental Procedures and Operational Workflow:

Nanostructures were prepared hydrothermally, washed, and calcined. Characterization involved XRD, TEM, BET, zeta potential, and UV-Vis DRS. Photocatalytic experiments were conducted by irradiating dye solutions with catalyst under UV light, sampling at intervals, and measuring concentration changes with UV-Vis spectrophotometry.

5：Data Analysis Methods:

Data were analyzed using Scherer's formula for crystallite size, Kubelka-Munk analysis for band gap, and degradation efficiency calculations based on concentration changes.