Preparation And Properties Study Of Co-Fe PBA Magnetic Nanomaterials In AOT Microemulsion

The Prussian blue analogous complexes have been widely concerned in recent years. As M(CN)6- may be assembled into a high-spin ground state, high Curie temperature of the molecule-based magnets, the magnetic researches become a hot spot. There are so many gaps and channels in the structure of Prussian blue analogues that it is possible to improve and adjust the nature of the material when we tune different anions, cations and solvent molecules into the entry of groups. But unfortunately, a systematic study on material, which doped with alkali metal ions and thus affects the properties, is rather scarce.A series of Co-Fe Prussian blue analogues nanomaterials with Rb+,Cs+,Na+K+, were synthesized and characterized in microemulsion in this paper. The products were characterized by TEM,SEM,EDS,ICP,XRD,IR,UV-Vis TGA and SQUID etc. The results are shown in the following of four sections:1.5 nm spherical and 60 nm cubic nanoparticles of cobalt-iron Prussian blue analogues containing Cesium cation 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 Co/Fe, the amount of the alkali cation and the structure were studied. The products were characterized by TEM,SEM,UV-vis and EDS.2.40 nm spherical and 60 nm cubic nanoparticles of cobalt-iron Prussian blue analogues containing Rubidium cation were synthesized in microemulsion which containing surfactant sodium bis(2-ethlhexyl) sulfosuccinate(AOT)/isooctane/water. The effects of w, the concentration of reactants, the contenting of oil and the reaction temperature on the Co/Fe, the amount of the alkali cation and the structure were studied. The products were characterized by TEM,SEM,UV-vis and EDS.3. The properties of several CsCo-Fe PBA, RbCo-Fe PBA samples were studied. TGA, ICP, EDS were used in elemental analysis, and XRD, IR, SQUID in magnetic change analysis. The results reveal that the main factors of affecting magnetic products are the type and content of alkali metal.4.5 nm spherical,80 nm cubic nanoparticles of cobalt-iron Prussian blue analogues containing two kinds of alkali metal ions of Sodium and Potassium had been synthesized in AOT microemulsion. The structure and magnetic properties of the products were characterized by UV-vis,IR,XRD,EDS,ICP and SQUID etc. It is found that w and the concentration of reactants affect the structure of the compound. Furthermore, the main factor affecting magnetism is the content of alkali metal.