School of Chemistry & Environment, South China Normal University, Guangzhou 510006, China.
J Hazard Mater. 2011 May 15;189(1-2):40-7. doi: 10.1016/j.jhazmat.2011.01.132. Epub 2011 Mar 3.
TiO(2) was prepared by a hydrothermal method at a low temperature and used to degrade and mineralize dimethyl phthalate (DMP). TiO(2) was characterized by XRD, TEM, BET and UV-vis techniques. The characteristics of TiO(2) prepared by a hydrothermal method (h-t TiO(2)) included a good crystalline anatase phase, greater surface area, stronger absorption to UV light wavelength and lower agglomeration than TiO(2) prepared by a classic sol-gel method (s-g TiO(2)). The photocatalytic activity of h-t TiO(2) prepared under optimal hydrothermal condition (180°C for 10h) was 2.5 times higher than that of s-g TiO(2) in degrading DMP. The process of photocatalysis combined with UV irradiation and ozonation (TiO(2)/UV/O(3)) considerably improved the mineralization and degradation of DMP compared to photocatalysis combined with UV irradiation (TiO(2)/UV), ozonation combined with UV irradiation (UV/O(3)), and ozonation alone (O(3)). A kinetic study showed the mineralization in TiO(2)/UV/O(3) followed the Langmuir-Hinshelwood model.
采用水热法在低温下制备 TiO(2)，并将其用于降解和矿化邻苯二甲酸二甲酯（DMP）。采用 XRD、TEM、BET 和 UV-vis 技术对 TiO(2)进行了表征。水热法（h-t TiO(2))制备的 TiO(2)具有良好的结晶锐钛矿相、更大的表面积、对紫外光波长更强的吸收和更低的团聚性，优于经典溶胶-凝胶法（s-g TiO(2))制备的 TiO(2)。在最佳水热条件（180°C 下 10h）下制备的 h-t TiO(2)的光催化活性在降解 DMP 方面比 s-g TiO(2)高 2.5 倍。与光催化与紫外线照射（TiO(2)/UV)、臭氧与紫外线照射（UV/O(3))、单独臭氧（O(3))相比，光催化结合紫外线照射和臭氧（TiO(2)/UV/O(3))处理极大地提高了 DMP 的矿化和降解。动力学研究表明，TiO(2)/UV/O(3)中的矿化遵循朗缪尔-欣谢尔伍德模型。
