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In this paper, a comparative study on the photocatalytic degradation of the Rhodamine B (RhB) dye as a model compound using N-Fe codoped TiO 2 nanorods under UV and visible-light (λ ≥ 420 nm) irradiations has been performed. TiO 2 photocatalysts were fabricated as aligned nanorod arrays by liquid-phase deposition process, annealed at different temperatures from 400 to 800 ℃. The effects of annealing temperature on the phase structure, crystallinity, BET surface area, and resulting photocatalytic activity of N-Fe codoped TiO 2 nanorods were also investigated. The degradation studies confirmed that the nanorods annealed at 600 ℃ composed of both anatase (79%) and rutile phases (21%) and offered the highest activity and stability among the series of nanorods, as it degraded 94.8% and 87.2% RhB in 120 min irradiation under UV and visible-light, respectively. Above 600 ℃, the photocatalytic performance of nanorods decreased owning to a phase change, decreased surface area and bandgap, and growth of TiO 2 crystallites induced by the annealing temperature. It is hoped that this work could provide precious information on the design of 1D catalyst materials with more superior photodegradation properties especially under visible-light for the further industrial applications. and 3.2 eV for rutile phase), which allows it to absorb only a small portion of sunlight corresponding to the UV region of solar spectrum. On the other hand, the recombination rate of photo-generated electron and hole pairs in TiO 2 is high [3]. Hence, these conclude the low photocatalytic efficiency of TiO 2 in the visible region. To overcome the drawback of low photocatalytic efficiency, considerable efforts have been taken, such as dimensionality reduction [4], metal and non-metal doping [5], and semiconductor coupling [6]. Onedimensional (1D) TiO 2 nanostructures, including nanobelts, nanofibers, nanorods, nanowires, and nanotubes [7][8][9][10][11] can be considered as one of good 108

We report the observations on the structural characterization and optical properties of SnO2nanowires post-treated under different annealing temperatures (300, 400, 500 & 600 °C) for 1 h.

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