功能化纳米多孔材料的合成及催化性能初探

发布时间：2018-06-11 14:23

本文选题：介孔固体碱 + 介孔沸石　；参考：《绍兴文理学院》2017年硕士论文

【摘要】：多孔材料由于其大的比表面积、均一的孔径以及可调控的骨架组成而受到了广泛研究关注。其广泛应用于催化、吸附、分离、气体存储等领域。本论文致力于合成氨基功能化的多孔聚合物材料、功能化的多级孔沸石催化剂以及可磁分离的功能化多孔碳材料,系统的进行了对上述功能化多孔材料在催化精细化学品合成及水中有机染料吸附中的应用研究。第一章简单概述了多孔材料的类型、研究进展。结合在多孔材料研究中需要解决的问题,提出了本文的课题研究目标及意义。第二章中在无模板的条件下通过溶剂热制备了具有大的比表面积的多孔聚合物,然后通过硝化、还原的方法得到了催化性能优异的纳米多孔固体碱。然后对该材料的碱催化活性进行了研究,并且对其丰富的多孔结构、独特的超疏水特性和针对二氧化碳的抗毒化作用进行了表征。结果表明该材料具有丰富的纳米孔结构,催化活性位点多,超疏水,对二氧化碳不敏感等特点,这对于它们应用于绿色和可持续碱催化过程,催化制备各种高附加值的精细化学品具有重要的潜在应用价值。第三章中制备了具有b轴生长,负载Pd和过渡金属氧化物的介孔ZSM-5沸石单晶(ZSM-5-OM-PdO_x-Mo_x)。然后对该种材料在催化氧化方面进行了探索,并对其独特的孔结构和沸石分子筛骨架进行了表征。通过研究表明,ZSM-OM-PdO_x-MO_x具有丰富的纳米孔和高度结晶度的骨架结构,Pd和过渡金属的活性物种均匀分散于ZSM-5-OM孔道中,其显示出独特的相互作用,有利于活化氧气分子,进而增强其选择性催化氧化的能力。第四章中制备了具有部分石墨化骨架和表面润湿性可控的规则介孔碳材料。合成过程中铁物种的引入赋予了材料新颖的磁分离特性(PR-Fe-P123-800和PR-Ni-P123-800)。然后对该种材料关于水中污染物的选择性吸附性能进行了研究,并对其独特的石墨化结构、磁分离和规则介孔结构等方面进行了表征。结果表明,PR-Fe-P123-800和PR-Ni-P123-800材料独特的磁分类性和吸附性质对于它们用于除去水中的各种有机污染物具有重要的应用价值。
[Abstract]:Porous materials have attracted much attention due to their large specific surface area, uniform pore size and controllable skeleton composition. It is widely used in catalysis, adsorption, separation, gas storage and other fields. This thesis is devoted to the synthesis of amino functionalized porous polymer materials, functionalized multiporous zeolite catalysts and magnetic separable functional porous carbon materials. The applications of the functionalized porous materials in the synthesis of fine chemicals and the adsorption of organic dyes in water were systematically studied. In the first chapter, the types and progress of porous materials are briefly summarized. Combined with the problems that need to be solved in the study of porous materials, the research goal and significance of this paper are put forward. In the second chapter, porous polymers with large specific surface area were prepared by solvothermal method without template, and then nano-porous solid bases with excellent catalytic performance were obtained by nitrification and reduction. Then the alkali-catalyzed activity of the material was studied, and its rich porous structure, unique superhydrophobic properties and anti-toxic effect against carbon dioxide were characterized. The results show that the material has rich nano-pore structure, many catalytic active sites, superhydrophobicity, insensitivity to carbon dioxide, and so on, which can be used in green and sustainable alkali-catalyzed processes. The catalytic preparation of various fine chemicals with high added value has important potential application value. In chapter 3, mesoporous ZSM-5 single crystals with b-axis growth, supported PD and transition metal oxides have been prepared. Then the catalytic oxidation of the material was investigated, and its unique pore structure and zeolite framework were characterized. The results show that ZSM-OM-PdOx-MOX has abundant nano-pores and highly crystallized skeleton structure, PD and active species of transition metals are uniformly dispersed in the ZSM-5-OM pore channel, which shows unique interaction and is beneficial to the activation of oxygen molecules. Furthermore, the ability of selective catalytic oxidation was enhanced. In chapter 4, regular mesoporous carbon materials with partially graphitized framework and controllable surface wettability were prepared. The introduction of iron species in the synthesis process gives the materials novel magnetic separation characteristics PR-Fe-P123-800 and PR-Ni-P123-800. Then the selective adsorption of pollutants in water was studied, and its unique graphitization structure, magnetic separation and regular mesoporous structure were characterized. The results show that the special magnetic classification and adsorption properties of PR-Fe-P123-800 and PR-Ni-P123-800 have important application value for their application in the removal of various organic pollutants in water.
【学位授予单位】：绍兴文理学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB383;O643.36

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