Study On The Preparation And Characterization Of Photomagnetic Co-Fe Prussian Blue Analogues Nanomaterials In Microemulsion

In recent years, the preparation and application of cobalt-iron Prussian blue analogues containing alkali ion with photoinduced magnetization have been the hot in the studies of nanostructured materials. To prepare nanomaterials in microemulsion is a valube new way because the size and morphology of products can be controlled artificially. Herein, the dissertation gives emphasis to the synthesis of Prussian blue analogues containing sodium and potassium ion in microemulsion. The products were characterized by XRD,TEM,SEM,AFM,EDS,IR and UV-vis etc. The results are shown in the following three sections:1. Cubic, hollow cubic and spherical nanoparticles of cobalt-iron Prussian blue analogues containing potassium ion were synthesized in poly oxyethylene tertoctylphenyl ether (TritonX-100)/n-hexanol/cyclohexane/water microemulsion. To the best of our knowledge the synthesis of hollow cubic cobalt-iron PBA nanocrystals have not been reported previously. The effects of molar ratio of water to surfactant (w), the concentration of reactants, the reaction temperature and oil concentration on the morphology of products were studied. Furthermore, the reaction mechanism in microemulsion was further discussed through the determination of the hydrodynamic diameter by DLS.2. Films and cubic nanoparticles of cobalt-iron Prussian blue analogues containing potassium ion were firstly synthesized in reverse microemulsion which containing cetanyl trimethyl ammonium bromide (CTAB)/pentanol/isooctane/water. To the best of our knowledge the preparation of filmy cobalt-iron PBA nanocrystals in microemulsion have not been reported previously. The effects of w, the concentration of reactants and the reaction temperature on the morphology of products were studied. The electron transfer in cobalt-iron PBA because of the interaction between the product and CTAB induced the formation of blue filmy material in reduction, and the result could be confirmed by IR, EDS and XPS analysis.3. Spherical and cubic nanoparticles of cobalt-iron Prussian blue analogues containing potassium and sodium ions were synthesized in microemulsion which containing surfactant sodium bis(2-ethlhexyl) sulfosuccinate(AOT)/isooctane/water. The effects of w, the concentration of reactants and the reaction temperature on the morphology of products were studied. The products were characterized by XRD,TEM,EDS and UV-vis.