Abstract
In order to extend absorption to visible light spectrum, black TiO2 nanotubes (TNT) were synthesized by electrochemical reduction of anodized anatase TNT. Subsequently, Au nanoparticles (NPs) and PbS quantum dots (QDs) as light-harvesting antennae were co-sensitized on black TNT by magnetron sputter technique and dip coating approach. The nanocomposites H-TNT-Au-PbS display strong absorption in the wavelength above 400nm. As a result, the photocurrent density of H-TNT-Au-PbS was enhanced by 89.1% comparing with that of pristine TNT under visible illumination. This study could offer a low-cost and simple process for fabricating visible-driven photocatalysts with better performance and good stability.
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