Photoelectrochemical performance of hydrogenated ZnO/CdS core–shell nanorod arrays

• Hydrogenated ZnO/CdS core–shell nanorod arrays were prepared via a two-step electrochemical deposition process.
• Calculated band gaps of 2.25 eV were obtained.
• The marked photocurrent in 1 M CH3OH aqueous solution with a pH = 9 under visible light illumination was observed and discussed.

High density and vertical hydrogenated ZnO/CdS core–shell nanorod arrays (CSNAs) have been prepared directly on F-doped SnO2 (FTO) substrates via a two-step electrochemical deposition process. Calculated band gaps of 3.25 and 2.25 eV were obtained for hydrogenated ZnO and hydrogenated ZnO/CdS samples respectively. Meanwhile, the photoelectrochemical (PEC) investigations verify that the ZnO/CdS CSNAs has a more effective photovoltaic response capability than the hydrogenated ZnO nanorod arrays alone in 1 M CH3OH aqueous solution with a pH = 9.

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