1：Experimental Design and Method Selection:

K2Ti8O17 nanowires were synthesized by a one-step hydrothermal method using TiO2 and KOH as raw materials. The synthesis conditions such as temperature, KOH concentration, and reaction time were varied to control the morphology and phase purity of the nanowires.

2：Sample Selection and Data Sources:

Anatase titanium dioxide (98.8%) and potassium hydroxide (85%) were used without further purification. The samples were characterized by XRD, FESEM, HRTEM, XPS, UV-vis-NIR spectrophotometer, Raman spectrometer, FTIR, and BET surface area analysis.

3：8%) and potassium hydroxide (85%) were used without further purification. The samples were characterized by XRD, FESEM, HRTEM, XPS, UV-vis-NIR spectrophotometer, Raman spectrometer, FTIR, and BET surface area analysis. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Stainless steel autoclave, X-ray diffractometer (XRD, D/Max2550, Rigaku, Japan), field emission scanning electron microscopy (FESEM, Hitachi, S-4800), high-resolution transmission electron microscopy (HRTEM, Tecnai G2F20 S-TWIN, FEI, USA), X-ray photoelectron spectrometer (ESCALAB MKII, VG40 Scientific, UK), UV-vis-NIR spectrophotometer (Lambda 950, Perkin-Elmer, USA), Microscopic Confocal Laser Raman spectrometer (Via Reflex, Renishaw, UK), V70 FTIR spectrophotometer (Bruker), Micromeritics ASAP 2020 system for BET analysis.

4：Experimental Procedures and Operational Workflow:

The hydrothermal reaction was carried out at different temperatures and KOH concentrations. The products were washed with distilled water and ethanol, dried, and then characterized. Adsorption experiments were conducted with MB as a model pollutant under various conditions.

5：Data Analysis Methods:

The adsorption data were analyzed using pseudo-first-order, pseudo-second-order kinetic models, Langmuir and Freundlich isotherm models, and thermodynamic parameters were calculated.