Zn₂GeO₄and MnO₂Based Nanocomposite:Synthesis And Applications

In the past decades, various nanostructured materials have been synthesized via mature techniques, and multi-functional inorganic-organic hybrid materials have attracted considerable attention. Inorganic-organic hybrid material combines two components together to get a better function, which has been widely used in electronics, photocatalysis, absorption, ion-exchange and sensor. So it is vitally important to discover and study inorganic-organic hybrid nanomaterials.In this thesis, synthesis, characterizations and applications of inorganic-organic hybrid (Zn2GeO4-diethylenetriamine), inorganic-polymer composites (SiO2/PNIPAM, Zn2GeO4/PNIPAM, MnO2/PPy) have been totally discussed. The structures and properties of these hybrid materials were characterized and studied by X-ray diffraction (XRD), Fourier translation infrared (FTIR), thermogravimetric analysis (TG), field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS).(1)3D Zn2GeO4-diethylenetriamine hybrid nanobuddles were synthesized by a moderate solvothermal route using diethylenetriamine as medium reagent, and the length of naonowires that consist of nanobundles is5-8μm. It exhibits an intense emission band at about406nm with a shoulder at431nm, compared with pure inorganic material.(2) SiO2nanosphere has been prepared via Stober method and its diameter is about100nm. The external surface has been coated with a layer of function polymer PNIPAM, forming SiO2/PNIPAM structure. Their nanostructures and compositions are thoroughly characterized. Zn2GeO4nanowire has been coated with a layer of function polymer PNIPAM. The characteristic peaks of PNIPAM have appeared in FTIR spectra, which indicates we have successfully prepared Zn2GeO4/PNIPAM composite.(3) MnO2naowire has been synthesized by hydrothennal method in a acidic environment. The reaction temperature is140℃for10h. MnO2nanowire acts as both template and oxidant to initiate the polymerization of pyrrole monomers on its fresh-activated surface, and the core-shell structure MnO2/PPy has been obtained. For as-synthesized MnO2/PPynanocomposite, the cyclic voltammograms curves at different scan rates of1,2,5,10,20and50mV/s display almost ideal capacitive behavior, indicating that the electrode material possesses a good electron transfer. With the increase of scan rate, specific capacitances of MnO2/PPy composite gradually decrease. However, the electrochemical properties still need be improved due to the low specific capacitance.