College of Chemical Engineering, Northwest University, 229 Taibai North Road, Xi'an, Shaanxi 710069, China.
J Hazard Mater. 2010 Apr 15;176(1-3):569-74. doi: 10.1016/j.jhazmat.2009.11.066. Epub 2009 Nov 18.
Photocatalytic degradation of 4-nitrophenol was investigated using Fe-doped (1, 3, 5 and 8 wt.% Fe) TiO(2) catalysts under UV light irradiation in aqueous dispersions in the presence of H(2)O(2). Photocatalysts with the lowest Fe content (1%) showed a considerably better behavior with respect to the unloaded TiO(2) and the catalysts with higher Fe contents. Photocatalytic degradation was studied under different conditions such as amounts of 1% Fe-TiO(2) catalyst, H(2)O(2) dose and initial pH of 4-NP solution. The results indicated that about 67.53% total organic carbon of a solution containing 20 mg L(-1) 4-NP was removed at pH 6.17 by using 4.9 mM of H(2)O(2) and 0.4 g L(-1) of the catalyst in a 2-L batch photo-reactor, the complete degradation of 4-NP occurring after 60 min. It was also observed that catalytic behavior could be reproduced in consecutive experiments without a considerable decrease of the UV/Fe-TiO(2)/H(2)O(2) process efficiency.
采用 Fe 掺杂（1、3、5 和 8wt.%Fe）TiO2 催化剂在 UV 光照下，于含有 H2O2 的水溶液中光催化降解 4-硝基苯酚。与未负载的 TiO2 和高 Fe 含量的催化剂相比，Fe 含量最低（1%）的光催化剂表现出了更好的性能。在不同条件下研究了光催化降解，例如 1%Fe-TiO2 催化剂的用量、H2O2 剂量和 4-NP 溶液的初始 pH 值。结果表明，在 pH 值为 6.17 时，使用 4.9mM 的 H2O2 和 0.4g/L 的催化剂在 2L 批式光反应器中，可去除浓度为 20mg/L 的 4-NP 溶液中约 67.53%的总有机碳，4-NP 完全降解发生在 60 分钟后。还观察到，在没有明显降低 UV/Fe-TiO2/H2O2 过程效率的情况下，催化行为可以在连续实验中重现。
