Morphology-controlled Synthesis And Application Of PB Nanoparticles By Imidazolium Ionic Liquids And Strawberry-like PS/PBcomposite Microspheres

Room temperature ionic liquids (RTILS) are organic salts which are liquids at ambient conditions. They have special physical and chemical properties, such as low volatility, wide electrochemical window, non-flammability, high thermal stability, and so on. According to these specific properties, RTILs can be served as substitutes for volatile organic solvents and have been widely used in various chemical fields, such as organic catalysis and electrochemistry.Prussian blue (PB), which can be indexed as Mm+[M’(CN)6]n-,belongs to an important family of molecule-based magnetic materials and has played a lot of important roles in the fields of magnetic molecules, electrochromic devices, and electrochemical biosensors for its attractive electrochemical, photophysical, and magnetic properties.The main points of this dissertation are summarized as follows:1. In this paper the synthesis of different chain length imidazolium-based ionic liquids and polymeric ionic liquid, And applying it in the preparation of Prussian blue nanoparticles. By Select different types of imidazole-based ionic liquids, because of it has sweak reduction, Fe3+was reduced to Fe2+and in growth of PB nanoparticles. Such a result by the experimental comparison of that by the impact of EMIBr and HMIBr to grow of Poorly dispersion and mostly in the reunion of PB nanoparticles and by the impact of ViEtIm+Br-to grow a good of micro-spherical product witch accumulation PB nanoparticles. By adjusting the conditions, when added to the polyionic liquid in the solution, that to grow of the cubic crystal morphology and good dispersion, of PB nanoparticles. As the results of cyclic voltammetry (CV) responses, this new kind of the impact of ViEtIm+Br-of PB microspheres can act as a good steady electrode material due to its good repeatability of CV responses for electrocatalytic reduction of H2O2.2. A kind of unique strawberry-like polystyrene/prussian blue (PS/PB) composite microspheres were successfully synthesized and the formation of them was optimized by introducing imidazole-based ionic liquid functional groups (imidazole-ILFGs). After the modification of imidazole-ILFGs on the surface of PS microspheres by the copolymerzation of St and ViEtIm+Br-, PB nanoparticles were in-situ reduced on the surface of poly(St-co-ViEtIm+Br") microspheres with the average diameter of125nm. Due to the present of imidazole-ILFGs on the surface of PS microspheres and their ion exchange and weak reducing capacity, Fe+was reduced to Fe2+and in-situ growth of PB nanoparticles could occur on the surface of poly(St-co-ViEtIm+Br-) microspheres without any other reducing agent added into the solution. TEM image and the calculation result by XRD data, the average size of PB nanoparticles was about15nm. As the results of cyclic voltammetry (CV) responses, this new kind of unique strawberry-like PS/PB composite microspheres can act as a good steady electrode material due to its good repeatability of CV responses for electrocatalytic reduction of H2O2.