Laboratory of Applied Environmental Chemistry, Department of Environmental Sciences, University of Kuopio, Patteristonkatu 1, FI-50100, Mikkeli, Finland.
Water Sci Technol. 2009;60(10):2471-5. doi: 10.2166/wst.2009.660.
Degradation of salicylic acid (SA) with thin film photocatalyst, titanium dioxide (TiO(2)) and nitrogen-doped TiO(2) (TiO(2-x)-N(x)) combined with ultraviolet (UV) radiation was studied. TiO(2) film with thickness of 15 and 65 nm was tested. The TiO(2-x)-N(x) film had thickness of 15 nm on top of TiO(2) (50 nm). Photocatalysts were prepared on glass substrate by atomic layer deposition (ALD) technique. The effect of initial pH (3-10) was studied with SA concentration of 10 mg/l. Decomposition of SA was fastest at pH 6 with both films and the rate was equal at initial pH values 3 and 4.3. However, at higher pH values the non-doped film was more efficient.
采用薄膜光催化剂二氧化钛（TiO2）和掺氮二氧化钛（TiO2-x-Nx）与紫外（UV）辐射相结合，研究了水杨酸（SA）的降解。测试了厚度分别为 15nm 和 65nm 的 TiO2 薄膜。TiO2-x-Nx 薄膜的厚度为 15nm，位于 TiO2（50nm）的顶部。光催化剂通过原子层沉积（ALD）技术在玻璃基底上制备。用 10mg/L 的 SA 浓度研究了初始 pH 值（3-10）的影响。两种薄膜在初始 pH 值为 6 时对 SA 的分解速度最快，在初始 pH 值为 3 和 4.3 时速度相等。然而，在更高的 pH 值下，未掺杂的薄膜效率更高。
