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Fabrication of Heterogeneous TiO-CdS Nanotubular Arrays on Transparent Conductive Substrate and Their Photoelectrochemical Properties

Nanomaterials and Nanotechnology, ISSN: 1847-9804, Vol: 5
2015
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Article Description

This paper describes an easy and time-saving strategy for the fabrication of heterogeneous nanotubular arrays of TiO-CdS (TCHNTAs) on transparent conductive glass (FTO) and their photoelectrochemical properties. The use of transparent FTO instead of opaque Ti substrate allows incident light from the substrate side. The anodized TiO nanotubular arrays were firstly detached from Ti substrate by anodization under a high voltage of 120 V and then transferred to FTO substrate using TiO (P25) paste as a binder, followed by sensitization with CdS nanoparticles. After optimizing the deposition cycles of CdS nanoparti-cles, the TCHNTAs on FTO substrate demonstrated an enhanced photocurrent density in the NaS/NaSO electrolyte under front-side illumination from the FTO side, which improved by ~ 21% when compared with the photocurrent density under back-side illumination from the TiO-CdS side. This improvement in photoelectrochem-ical properties can be ascribed to the reduced charge recombination on the interface between the TiO nanotubes and the CdS nanoparticles under front-side illumination. Our strategy for nanotubular transfer on transparent substrate may extend the applications of TiO nanotubular arrays into other fields, such as dye-sensitized solar cells, photochromism and photocatalysis.

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