| Metal-organic frameworks(MOFs) combine the properties of both composite polymers and coordination compounds. Zeolitic imidazolate frameworks(ZIFs) as a subclass of MOFs fefer to the crystalline tridimensional networks that consist of metal ions connected with the imidazolate type of linkers. They usually possess a high degree of microporosity and exceptional thermal and chemical stabilities. Therefore, they show promised potential applications for gas sorption and gas separation. Over the past decades, nanoscale ZIFs realizing the diversity of structure can give rise to novel applications in bio-imaging, bio-sensing and selective recognition for gas. Moreover, the nanocomposites based on ZIFs acted as either host or guest materials, not only realize functionalization, but also possess the advantages of other materials such as fluorescence and magnetism, which reduce the limitations of pure ZIFs.This paper presents a simple and universal method templated from zeolitic imidazolate framework-8(ZIF-8) to fabricate carbon nanodots@ZIF-8(C-dots@ZIF-8) and glutathione protected Au nanoclusters(GSH-Au NCs/ZIF-8) nanocomposites at room temperature; further utilize GSH-Au NCs/ZIF-8 nanoparticles as precursor to construct Au/Zn O nanocomposites through high temprature. Among them the as-prepared rhombic dodecahedral C-dots@ZIF-8 core-shell nanoparticles with tunable size have green fluorescence and p H-responsive characteristics and can be employed as potential platforms for simultaneous p H-responsive anticancer drug delivery and cell fluorescence imaging, which can be further applied in bio-medical field. As for Au/Zn O nanocomposites, they exhibit excellent catalytic activity and cycle stability at visible light photocatalytic hydrogen evolution together with degradation of Rhodamine B(Rh B) for their unique structure. Transmission electron microscopy(TEM), Field-emission scanning electron microscopy(FE-SEM) and UV-visible spectrophotometer(UV-Vis) are the main characterizations in the paper. |
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