College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China.
J Environ Sci (China). 2010;22(8):1290-6. doi: 10.1016/s1001-0742(09)60252-7.
Fe-doped TiO2 coated on activated carbon (Fe-TiO2/AC, FTA) composites were prepared by an improved sol-gel method and characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffractometry, inductively coupled plasma mass spectrometry and BET surface area analysis. Obtained FTA composites were applied to the continuous treatment of dye wastewater in a dynamic reactor. The effects of Fe ion content, catalyst content, UV-lamp power and flowrate of the continuous treatment of dye wastewater on degradation efficiency were analyzed to determine the optimum operating conditions of dye wastewater degradation. Continuous photocatalytic experiments provided interesting results that VIFTA had a high chemical oxygen demand (COD) removal rate compared with TiO2, Fe doped TiO2 (FT) and TiO2 coated on activated carbon (TA). In particular, when using the FTA catalyst with a Fe ion content of 0.33%, the kinetic content (k = 0.0376) of COD removal was more than the sum of both TA (0.0205) and 0.33% FT (0.0166). FTA showed a high photoactivity because of a synergistic effect between Fe ions and AC on TiO2, which is higher than the individual effects of AC or Fe ions on TiO2. Additionally, for the photocatalytic degradation of dye wastewater, the optimum Fe ion content, catalyst content, UV-lamp power and flowrate were 0.33%, 6 g/L, 60 W (two lamps) and 300 mL/hr, respectively. An investigation of catalyst reuse revealed that the 0.33% FTA showed almost no deactivation in photocatalytic degradation of naturally treated wastewater.
负载在活性炭上的掺铁二氧化钛（Fe-TiO2/AC，FTA）复合材料是通过改进的溶胶-凝胶法制备的，并通过扫描电子显微镜、X 射线光电子能谱、X 射线衍射、电感耦合等离子体质谱和 BET 比表面积分析进行了表征。所获得的 FTA 复合材料被应用于动态反应器中连续处理染料废水。分析了 Fe 离子含量、催化剂含量、UV 灯功率和染料废水连续处理流速对降解效率的影响，以确定染料废水降解的最佳操作条件。连续光催化实验提供了有趣的结果，与 TiO2、掺铁 TiO2（FT）和负载在活性炭上的 TiO2（TA）相比，VIFTA 具有较高的化学需氧量（COD）去除率。特别是，当使用 Fe 离子含量为 0.33%的 FTA 催化剂时，COD 去除的动力学含量（k=0.0376）高于 TA（0.0205）和 0.33%FT（0.0166）的总和。FTA 表现出较高的光活性，这是由于 Fe 离子和 AC 对 TiO2 的协同作用，其高于 AC 或 Fe 离子对 TiO2 的单独作用。此外，对于染料废水的光催化降解，最佳的 Fe 离子含量、催化剂含量、UV 灯功率和流速分别为 0.33%、6 g/L、60 W（两个灯）和 300 mL/hr。对催化剂重复使用的研究表明，0.33%FTA 在天然处理废水的光催化降解中几乎没有失活。
