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Highly ordered TiO 2 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 (AgNO 3 ) 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/cm 2 ) 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.

Cu2O-modified ZnO nanorods are prepared by a two-step electrodeposition method on ITO substrates, and the deposition time of Cu2O is 0, 1, 5, and 10 min, respectively. Cu2O particles are embedded in the interspaces of the ZnO nanorods, and the amounts of the Cu2O particles increase obviously when the deposition time lasts longer. The peaks corresponding to ZnO nanorods and Cu2O particles are detected from scanning electron microscope (SEM) and X-ray diffraction (XRD) results. UV-vis absorption spectra measurements have shown the bandgaps of ZnO nanorods shift from 3.22 to 2.75 eV. The methyl orange (MO) concentration can be reduced to around 15% in 100 min with Cu2O electrodeposition time for 10 min.

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