1. Synthesis schematic diagram of ITO/TiO₂NTs

2. XRD patterns of the as-prepared TiO₂NTs (amorphous TiO₂NTs), TiO₂NTs after calcined at 450 ℃ (TiO₂NTs), In_9.45Sn₁/TiO₂NTs and ITO/TiO₂NTs

3. High resolution XPS spectra of In_9.45Sn₁/TiO₂NTs and ITO/TiO₂NTs

4. (a-c) SEM images of TiO₂NTs, In_9.45Sn₁/TiO₂NTs and ITO/TiO₂NTs; (d, e) TEM images of In_9.45Sn₁/TiO₂NTs and ITO/TiO₂NTs; (f) HRTEM image recorded at the red dotted box region in (e); (f₁, f₂) Fast Fourier Transform images and interplanar spacing images of sample in the regions 1 and 2 of (f), respectively

5. (a) UV-Vis DRS spectra and (b) band gaps of the samples calculated using Tauc plots

6. (a) Photocatalytic degradation of MB by TiO₂NTs, In_9.45Sn₁/TiO₂NTs and ITO/TiO₂NTs; (b) Pseudo-first-order kinetic plots of MB photodegradation; (c) Photostability tests over ITO/TiO₂NTs photocatalyst for the cycling photodegradation of MB

7. (a) Instantaneous current density-time curves (i-t); (b) Photocurrent density-potential curves (J-V) (scanning rate: 10 mV/s); (c) Electrochemical impedance spectra (EIS); (d) Mott-Schottky curves (M-S) of TiO₂NTs, In_9.45Sn₁/TiO₂NTs and ITO/TiO₂ NTs

8. Tests of active species trapping during the photocatalytic reaction with sacrificial reagents of EDTA-2Na, IPA and 4-Hydroxy-TEMPO under visible optical irradiation

9. Schematic illustration of the photocatalytic mechanism of ITO/TiO₂

10. SEM images and elemental distribution mappings of (a) Pt and (b) PbO₂ deposited on ITO/TiO₂NTs