Abstract
Highly ordered TiO2 nanorod (TNR) array films decorated with Ag nanoparticles (NPs) were synthesized on fluorine-doped tin oxide (FTO) by a hydrothermal treatment and a successive ionic layer adsorption reaction (SILAR) technique. The amount of Ag NPs on the TNR can be controlled by changing the number of cycles in silver nitrate (AgNO3) solution. The morphology, structure, composition, optical, photoelectrochemical and photocatalytic properties of the Ag/TNR films were investigated in detail. The Ag/TNR films exhibit larger redshift of the absorption edges and higher absorption intensities in the visible light range. Furthermore, the Ag/TNR films sensitized with 5 SILAR cycles show the best photocurrent density (32 μA/cm2) and photodegradation efficiency (95.52%), which is 5.7 and 1.3 times higher than that of pure TNR, respectively. The excellent properties can be ascribed to localized surface plasmon resonance (LSPR) effect of Ag NPs. The stability and reusability of the Ag/TNR films were also investigated. Therefore, the Ag/TNR films with high performance and stability can be used in potential applications.
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