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Surface modification of highly ordered nanotube arrays for efficient photoelectrocatalytic water splitting
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View: Figures


Image of FIG. 1.
FIG. 1.

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.

Image of FIG. 2.
FIG. 2.

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.

Image of FIG. 3.
FIG. 3.

UV-visible absorption spectra results of the TiNT, the ZnO-TiNT, and the CdS/ZnO–TiNT arrays.

Image of FIG. 4.
FIG. 4.

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).

Image of FIG. 5.
FIG. 5.

(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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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Surface modification of highly ordered TiO2 nanotube arrays for efficient photoelectrocatalytic water splitting