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Morphologies of TiNT array films: (a) top-view FE-SEM image of the TiNT array, (b) side-view FE-SEM image of the TiNT array (c) top-view FE-SEM image of the CdS/ZnO–TiNT arrays, (d) the EDX spectrum of the CdS/ZnO–TiNT arrays, (e) low-magnification HR-TEM image of the CdS/ZnO–TiNT, and (f) high-magnification HR-TEM image of the CdS/ZnO–TiNT.
XRD patterns of (a) the bare Ti foil and (b) the CdS/ZnO– NT arrays. The peaks denoted by A, C, Z, and Ti are anatase , hexagonal CdS, hexagonal ZnO, and metal titanium substrate, respectively.
UV-visible absorption spectra results of the TiNT, the ZnO-TiNT, and the CdS/ZnO–TiNT arrays.
Current density-potential characteristics for water splitting using the TiNT, the ZnO–TiNT, the CdS/TiNT, and the CdS/ZnO–TiNT arrays in the dark (dashed line) and under AM 1.5G illumination (solid line).
(a) Photocurrent dynamics in response to on-off irradiation, and (b) plot of ln vs for the photocurrent transient response of the CdS/TiNT and the CdS/ZnO–TiNT arrays.
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