Photoelectrochemical Measurements. Photoelectro-chemical (PEC) measurements were conducted using a potentiostat (Gamry, Reference 600) connected to a three-electrode system. The TNT film, a coiled Pt wire, and a Ag/AgCl electrode were employed as a working, a counter, and a reference electrode, respectively. The electrochemical impe-dance spectroscopy (EIS) Nyquist plot was obtained in the frequency range of 10 −2 −10 6 Hz with an alternating current(AC) voltage of 50 mV. The Mott−Schottky analysis was donewith a potential range from −1.0 to 1.0 V (vs Ag/AgCl) at aselected frequency of 1 kHz and AC voltage of 30 mV.