Temperature-controlled and shape-dependent ZnO/TiO2 heterojunction for photocathodic protection of nickel-coated magnesium alloys

In2S3@TiO2/In2S3 Z-Scheme Heterojunction with Synergistic Effect for Enhanced Photocathodic Protection of Steel

“…The peaks in the O1s spectrum for PT/IS samples ( Figure 3 b) can be fitted into two peaks with binding energies centered at 529.9 eV and 531.3 eV. These peaks correspond to lattice oxygen species in TiO 2 and surface hydroxyl groups/absorbed oxygen, respectively [ 28 ]. The In 3d XPS spectrum is shown in Figure 3 c, with the peaks at 444.7 eV and 452.2 eV corresponding to the In 3+ 3d 5/2 and In 3+ 3d 3/2 peaks, respectively, indicating the presence of In 3+ in PT/IS samples [ 17 ].…”

“…An equivalent circuit model with a two-time constants for EIS data fitting is exhibited in the inset of Figure 5 c and the values of fitting circuit parameters are listed in Table 1 . R s , R f , R ct, and CPE represent the series resistance, the film resistance, the charge transfer resistance across the interface of the photoanode and electrolyte, and the constant phase element, respectively [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. The charge transfer resistance across the interface of the photoelectrode and electrolyte in the low-frequency region is an important parameter for evaluating the electrochemical behavior of photoelectrodes.…”

Review of TiO2-Based Heterojunction Coatings in Photocathodic Protection

“…The MS plot is another commonly used method to determine the semiconductor type and calculate parameters such as the flat-band potential ( E fb ) and donor density ( N D ). , Liu et al utilized the hydrothermal method to prepare a ZnO/TiO 2 heterojunction coating on a Ni–Mg alloy surface. The positive slope of the MS plot indicated that the prepared coating was an n-type semiconductor coating.…”