掺氮多壁碳纳米管负载Ru/Fe催化剂处理水中2，4，6-三氯酚
多壁碳纳米管在电化学、催化剂等方面有着广泛的应用，对其进行改性修饰后可显著改善其功用与性能。本实验首先对多壁碳纳米管进行预处理、纯化、掺氮，然后采用浸渍法，制备出了掺氮多壁碳纳米管负载Ru/Fe的催化剂，并采用TEM、XRD及XPS对其进行表征，证明金属Ru/Fe已成功负载于碳纳米管上，且氮元素已成功掺杂于碳纳米管中。
实验还研究了Ru/Fe/N-MWNCTs对水中三氯酚的处理效率。研究结果表明，当负载的金属Ru与Fe达到3：1的时候去除率最大；随催化剂投加量的加大，反应速率增大，但当催化剂投加量达60mg后，增加催化剂投加量对处理效果没有明显的改善；随溶液初始浓度的增加，2，4，6-三氯酚的去除率减小，当浓度降到10mg/L以下时去除率明显降低；pH对实验反应的进行有影响但影响不是很明显；随着时间的增长，当反应到60min后，多壁碳纳米管对处理水样的去除效果变化趋于平缓。本实验所制备的Ru/Fe/N-MWNCTs催化剂在实验中可多次使用，证明催化剂具有良好的可回收性。
毕业论文关键词：2，4，6-三氯酚；催化加氢脱氯；双金属负载：掺氮碳纳米管；催化
Abstract As a kind of halogenated aromatic compounds, chlorophenol containing a benzene ring and several chlorine atoms, and are widely used as an chemical material。 Due to its highly toxic and non-biodegradable quality, chlorophenol has caused more and more serious pollution in the environment, and was blacklisted by many countries as the priority control and urgent needed to be controlled toxic pollutants。
Multi-walled carbon nanotubes were found to have significant applications in a wide range of electrochemistry and catalyst, and the nitrogen doping and loading of some metal elements may improve its catalytic activity instinctly。 In this study, after nitrogen doping, MWCNTs were loaded with Ru/Fe to form the Ru/Fe/N-MWNCTs catalyst, which was testified by the phenogram of TEM、XRD and XPS。
The prepared Ru/Fe/N-MWNCTs was used as an catalyst to study the treatment of 2,4,6-trichlorophenol(TCP) in water。 Results showed that when the ratio of metal Ru to Fe was up to 3：1, the removal rate TCP reached the highest value。 When the dosage of catalyst was 600mg/L, TCP has a removal rate of 95。65% after 1h reaction 。 The removal rate of TCP decreased with the increasing concentration of solution, and when the pH of solution was more than 7, TCP has the better removal efficiency。 After the reaction time was more than 1h, the catalytic effect of Ru/Fe/N-MWNCTs didn’t rise any more。 At last, the reusability of Ru/Fe/N-MWNCT was tested through the recollection of catalyst and retreatment of TCP。 Results demonstrated that the Ru/Fe/N-MWNCTs catalyst could be used more than once 。
Keywords：2,4,6-trichloropHenol;catalytic hydrogenation dechlorination; bimetallic load: nitrogen-doped carbon nanotubes; catalysis
目录
第一章 绪 论 1
1。1环境中氯酚的来源、危害及治理现状 1
1。1。1 环境中氯酚的性质、来源及危害 1
1。1。2 氯酚的常见治理方法 2
1。2催化加氢脱氯 4
1。2。1催化加氢脱氯反应及其应用 4
1。3碳纳米管概述 4
1。3。1碳纳米管结构及性质 4
1。3。2碳纳米管的应用 5
1。3。3。3碳纳米管负载金属催化剂 7
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