ZIF-8模板法合成納米粒子及其性能研究
發(fā)布時間：2018-12-16 20:02
【摘要】：金屬有機配位聚合物(MOFs)結合了復合高分子和配位化合物兩者的特點。類沸石咪唑骨架結構材料(ZIFs)作為MOFs的亞簇,指金屬離子與咪唑或其衍生物連接形成的一類三維網狀結構。它通常具有高度的微孔性和卓越的熱化學穩(wěn)定性,因此在氣體的選擇性吸附與分離等方面表現(xiàn)出極好的應用前景。近些年來,納米級的ZIFs在實現(xiàn)結構多樣化的同時,還被賦予了新的性能,如生物成像、傳感和選擇性氣體識別等。此外,以ZIFs作為主體或客氣材料而形成的ZIFs復合物,不但實現(xiàn)了ZIFs本身的功能化,還將其它材料的熒光、磁性等優(yōu)點引入其中,從而減少了ZIFs本身在應用中的局限性。本文提出了一種簡便通用的以類沸石咪唑骨架-8(ZIF-8)為模板的合成方法,在室溫下制備得到了碳量子點@ZIF-8(C-dots@ZIF-8)和谷胱甘肽保護金簇/ZIF-8(GSH-Au NCs/ZIF-8)復合納米粒子;同時又以GSH-Au NCs/ZIF-8為前驅體通過進一步高溫煅燒得到了Au/Zn O納米粒子。其中,具有可調尺寸的菱形十二面體結構的C-dots@ZIF-8核殼結構納米粒子具有綠色熒光和p H響應雙重性能,可被用作潛在的協(xié)同p H響應抗癌藥物輸送和生物細胞熒光成像載體,從而進一步應用于生物醫(yī)學領域。而Au/Zn O復合納米粒子則由于其獨特的結構特性,在可見光催化分解水產氫和降解染料羅丹明B(Rh B)方面有很好的催化活性和循環(huán)穩(wěn)定性。透射電子顯微鏡(TEM)和場發(fā)射掃描電子顯微鏡(FE-SEM),紫外-可見分光光度計(UV-Vis)等為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.
【學位授予單位】：東北師范大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB383.1;TQ460.1
本文編號：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.
【學位授予單位】：東北師范大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB383.1;TQ460.1
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