过渡金属离子掺杂TiO_2催化臭氧去除硝基苯的研究  

Degradation of Nitrobenzene by Ozone Coupled with Transition Metal Ion Doped TiO_2 Catalysts

作　　者：张静[1] 马军[2] 杨忆新[3] 汤黎[2] 何波辉 

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [3]东北大学秦皇岛分校环境科学与工程系,河北秦皇岛066004 [4]四川省医学科学院.四川省人民医院,四川成都610072

出　　处：《中国给水排水》2015年第11期68-70,共3页China Water & Wastewater

摘　　要：采用溶胶凝胶的方法,在500℃的条件下,分别制备了Ni、Co、Fe、Zn掺杂Ti O2的4种催化剂。通过ICP对4种催化剂的离子溶出浓度进行检测,发现几种离子的溶出量均远低于国家饮用水标准规定的限值。试验对比研究了单独臭氧、Ti O2掺杂前后催化臭氧氧化去除硝基苯的效果。结果表明,这4种金属离子的掺杂对金红石型Ti O2催化去除硝基苯的效果基本没有提高,但Co Ox-Ti O2对TOC的去除效果明显提高。通过GC和GC/MS进行硝基苯降解产物对比分析,发现相对单独臭氧氧化,Co Ox-Ti O2能有效提高对中间产物醛酮、羧酸的去除效果。Four types of Ni, Co, Fe and Zn-doped TiO2 catalysts were prepared respectively using sol-gel method at 500 ℃. The dissolved ion concentrations of the catalysts detected by ICP, and it was found that the ion dissolubility was far below the national drinking water standard. The removal efficiency of nitrobenzene by ozone and catalytic ozonation before and after doping TiO2 was compared. The results showed that the doping does not improve the removal efficiency of nitrobenzene by catalytic ozonation with rutile TiO2, but CoOx-TiO2 could improve the TOC removal efficiency. Nitrobenzene degradation products were analyzed by GC and GC/MS, and it was found that CoO2-TiO2 could effectively improve the removal efficiency of intermediate products, such as aldehyde ketone and earboxylic acid compared with ozone.

关 键 词：过渡金属离子 二氧化钛 臭氧 硝基苯 羟基自由基 

分 类 号：TU991.2[建筑科学—市政工程]