1：Experimental Design and Method Selection:

A hydrothermal method was used to synthesize anatase TiO2 nanosheets with different percentages of {001} facets, using HF as a shape-controlling agent and NaOH washing to remove surface F? ions. The photocatalytic activity was evaluated under UV light in a continuous flow reactor.

2：Sample Selection and Data Sources:

Samples were prepared with varying HF volumes (2.0 to 5.2 mL) and NaOH concentrations (0.1 to 0.8 M). Commercial TiO2 P25 and {101}TiO2 were used as references.

3：0 to 2 mL) and NaOH concentrations (1 to 8 M). Commercial TiO2 P25 and {101}TiO2 were used as references. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Materials included tetrabutyltitanate, hydrofluoric acid, sodium hydroxide, ethanol, and commercial TiO2 P25. Equipment included Teflon-lined autoclave, oven, centrifuge, XRD diffractometer, SEM, TEM, UV-vis spectrophotometer, BET analyzer, XPS spectrometer, photocatalytic reactor with UV lamp, and infrared spectrum analyzer.

4：Equipment included Teflon-lined autoclave, oven, centrifuge, XRD diffractometer, SEM, TEM, UV-vis spectrophotometer, BET analyzer, XPS spectrometer, photocatalytic reactor with UV lamp, and infrared spectrum analyzer. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Hydrothermal synthesis at 200°C for 24 h, washing with ethanol and water, drying, NaOH treatment, characterization using various techniques, and photocatalytic activity measurement with NO gas flow under UV light.

5：Data Analysis Methods:

XRD for crystal phase, SEM/TEM for morphology, BET for surface area, UV-vis for optical properties, XPS for surface chemistry, and NO conversion calculations using integrated concentration measurements.