ZIF-8模板法合成纳米粒子及其性能研究
发布时间：2018-12-16 20:02
【摘要】：金属有机配位聚合物(MOFs)结合了复合高分子和配位化合物两者的特点。类沸石咪唑骨架结构材料(ZIFs)作为MOFs的亚簇,指金属离子与咪唑或其衍生物连接形成的一类三维网状结构。它通常具有高度的微孔性和卓越的热化学稳定性,因此在气体的选择性吸附与分离等方面表现出极好的应用前景。近些年来,纳米级的ZIFs在实现结构多样化的同时,还被赋予了新的性能,如生物成像、传感和选择性气体识别等。此外,以ZIFs作为主体或客气材料而形成的ZIFs复合物,不但实现了ZIFs本身的功能化,还将其它材料的荧光、磁性等优点引入其中,从而减少了ZIFs本身在应用中的局限性。本文提出了一种简便通用的以类沸石咪唑骨架-8(ZIF-8)为模板的合成方法,在室温下制备得到了碳量子点@ZIF-8(C-dots@ZIF-8)和谷胱甘肽保护金簇/ZIF-8(GSH-Au NCs/ZIF-8)复合纳米粒子;同时又以GSH-Au NCs/ZIF-8为前驱体通过进一步高温煅烧得到了Au/Zn O纳米粒子。其中,具有可调尺寸的菱形十二面体结构的C-dots@ZIF-8核壳结构纳米粒子具有绿色荧光和p H响应双重性能,可被用作潜在的协同p H响应抗癌药物输送和生物细胞荧光成像载体,从而进一步应用于生物医学领域。而Au/Zn O复合纳米粒子则由于其独特的结构特性,在可见光催化分解水产氢和降解染料罗丹明B(Rh B)方面有很好的催化活性和循环稳定性。透射电子显微镜(TEM)和场发射扫描电子显微镜(FE-SEM),紫外-可见分光光度计(UV-Vis)等为本文所用的主要表征手段。
[Abstract]:Organometallic coordination polymer (MOFs) combines the characteristics of composite polymer and coordination compound. As a subcluster of MOFs, zeolite-like imidazole skeleton material (ZIFs) refers to a kind of three-dimensional reticular structure formed by metal ions joining with imidazole or its derivatives. It usually has high micropore properties and excellent thermochemical stability, so it has a good application prospect in selective adsorption and separation of gases. In recent years, nanoscale ZIFs has been endowed with new properties, such as biometric imaging, sensing and selective gas recognition. In addition, the ZIFs complex formed by using ZIFs as the host or polite material not only realizes the functionalization of ZIFs itself, but also introduces the advantages of fluorescence and magnetism of other materials into it, thus reducing the limitation of ZIFs itself in application. In this paper, a simple and general method for the synthesis of zeolite-like imidazole-8 (ZIF-8) was proposed. Carbon quantum dots @ ZIF-8 (C-dots@ZIF-8) and glutathione protected gold clusters / ZIF-8 (GSH-Au NCs/ZIF-8) composite nanoparticles were prepared at room temperature. At the same time, Au/Zn O nanoparticles were obtained by calcination of GSH-Au NCs/ZIF-8 at high temperature. Among them, the C-dots@ZIF-8 core-shell structure nanoparticles with adjustable diamond dodecahedron structure have the dual properties of green fluorescence and p-H response. It can be used as a potential carrier for synergistic pH response to anticancer drug delivery and fluorescence imaging of biological cells, which can be further applied in biomedical fields. However, Au/Zn O composite nanoparticles have good catalytic activity and cyclic stability in the visible light catalytic decomposition of aquatic hydrogen and the degradation of Rhodamine B (Rh B) due to their unique structural characteristics. Transmission electron microscope (TEM), field emission scanning electron microscope (FE-SEM) and UV-Vis spectrophotometer (UV-Vis) are the main characterization methods used in this paper.
【学位授予单位】：东北师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;TQ460.1
本文编号：2382974
[Abstract]:Organometallic coordination polymer (MOFs) combines the characteristics of composite polymer and coordination compound. As a subcluster of MOFs, zeolite-like imidazole skeleton material (ZIFs) refers to a kind of three-dimensional reticular structure formed by metal ions joining with imidazole or its derivatives. It usually has high micropore properties and excellent thermochemical stability, so it has a good application prospect in selective adsorption and separation of gases. In recent years, nanoscale ZIFs has been endowed with new properties, such as biometric imaging, sensing and selective gas recognition. In addition, the ZIFs complex formed by using ZIFs as the host or polite material not only realizes the functionalization of ZIFs itself, but also introduces the advantages of fluorescence and magnetism of other materials into it, thus reducing the limitation of ZIFs itself in application. In this paper, a simple and general method for the synthesis of zeolite-like imidazole-8 (ZIF-8) was proposed. Carbon quantum dots @ ZIF-8 (C-dots@ZIF-8) and glutathione protected gold clusters / ZIF-8 (GSH-Au NCs/ZIF-8) composite nanoparticles were prepared at room temperature. At the same time, Au/Zn O nanoparticles were obtained by calcination of GSH-Au NCs/ZIF-8 at high temperature. Among them, the C-dots@ZIF-8 core-shell structure nanoparticles with adjustable diamond dodecahedron structure have the dual properties of green fluorescence and p-H response. It can be used as a potential carrier for synergistic pH response to anticancer drug delivery and fluorescence imaging of biological cells, which can be further applied in biomedical fields. However, Au/Zn O composite nanoparticles have good catalytic activity and cyclic stability in the visible light catalytic decomposition of aquatic hydrogen and the degradation of Rhodamine B (Rh B) due to their unique structural characteristics. Transmission electron microscope (TEM), field emission scanning electron microscope (FE-SEM) and UV-Vis spectrophotometer (UV-Vis) are the main characterization methods used in this paper.
【学位授予单位】：东北师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;TQ460.1
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