摘   要氯酚作为当下常用的化工原料和产品，其广泛的应用造成了不小的环境的问题，其高毒性与难降解的性质，在国际范围内都引起了高度重视，特别是在水环境问题方面，受到了广泛的关注和深入研究，其中2，4，6-三氯酚已被许多国家列入受管控污染物行列。86264

碳纳米管因其性质结构稳定，可作为催化剂的理想载体，通过纯化掺氮采用浸渍法使金属负载到碳纳米管载体上，制备出负载Pd/Fe双金属的Pd/Fe/N-MWNCTs和Pd/Fe-MWNCTs催化剂，并对所制备的材料进行表征，其结果表明双金属均负载于碳纳米管表面。氯酚在水中难于分解，甚至不易被生物降解，传统方法对其处理也各存弊端，不能大范围推广。催化加氢脱氯（hydrodechlorination，HDC）可使氯酚加氢还原成无毒的产物，进而达到处理污染物的目的。

本实验使用Pd/Fe/N-MWNCTS对水中2，4，6-三氯酚进行加氢脱氯处理，研究反应条件对其处理效率的影响。研究结果显示，负载Pd/Fe金属催化剂，Pd的比例越大，处理效果越好；反应速率随催化剂投加量的递增而加快，当投加量超过60mg后，投加量对处理效果的影响不再明显；2，4，6-三氯酚溶液浓度的增加会使其去除率减小，且当浓度达到100mg/L时，处理效果便不再有明显变化；pH的改变并不会影响反应速率的趋势，但碱性环境下的处理效果要好于中性和酸性；反应前后溶液中氯离子浓度有显著的变化，2，4，6-三氯酚分子中的氯原子已通过加氢脱氯反应逐步脱除；所制备的Pd/Fe/N-MWCNTs催化剂可多次使用，催化剂重复性良好可回收利用。

毕业论文关键词：掺氮碳纳米管 2，4，6-三氯酚 催化加氢脱氯

Abstract    Chlorophenol as a commonly used in the chemical raw materials and products, created a lot of its extensive application environment, the nature of its high toxicity and refractory, have caused a attaches great importance to in the international scope, especially in the aspect of water environment problem, has received the widespread attention and in-depth research, including 2,4,6-trichlorophenol has been included in many countries controlled pollutants。Properties of carbon nanotubes because of its structure is stable, can be used as ideal carrier of catalyst through purification nitrating impregnation method is used to make metal load on the carrier of carbon nanotubes, preparation of the load Pd/Fe bimetallic Pd/Fe/N - MWNCTs and Pd/Fe - MWNCTs catalyst, and the preparation of the materials were characterized by, the results show that the bimetallic are load in the surface of carbon nanotubes。 ChloropHenol difficult to break down in the water, not easily biodegradable even, traditional methods for its treatment are also the disadvantages, not a wide range of promotion。 Catalytic hydrogenation dechlorination (hydrodechlorination of HDC) can make the product of chlorophenol hydrogenation reduction into non-toxic, thus achieve the purpose of dealing with pollutants。

This experiment using Pd/Fe/N - MWNCTS hydrogenation was carried out on the water 2,4,6 - trichlorophenol dechlorination treatment, and the influence of various reaction conditions on the processing efficiency were studied。 The results showed that the Pd/Fe as a load of metal, the greater the proportion of Pd, the better treatment effect; The reaction rate increases with increasing the amount of catalyst dosing, after when the additive amount reaches 60mg, dosing quantity effect on the treatment effect is no longer so obvious; 2,4,6 - trichlorophenol will reduce its removal rate, increased concentration of solution and when concentration of 100mg/L, the effect will not have obvious change; In Pd/Fe/N- MWCNTs processing 2,4,6-trichlorophenol reaction process, the pH of the trend of the change will not affect the reaction rate, but the treatment effect is better in neutral and alkaline environments acid; The preparation of Pd/Fe/N - MWCNTs catalyst can be used multiple times, recyclable repetitive。