The Preparation And Electrochemical Application Of Prussian Blue Nanocomposites

Prussian blue(PB)is a very important class of molecule-based magnet,which has excellent chemical stability,electrocatalytic activity and biocompatibility.It is often used as chemical and biological sensors in electrochemsitry fields.Especially,PB particles in nanoscale attract the extensive attention because of their unique electro-catalytic performance.Polymeric ionic liquids(PILs)are polymers prepared by polymerization of ionic liquid monomers.Being a novel polymeric material that combined the unique properties of ionic liquids and specific properties of polymers,PILs exhibit the main advantages of enhanced ionic conductivity,thermal stability and excellent mechanical property and have gained increasing attentions in many fields of chemistry,including the fabrication of nanocomposite with novel properties.Graphene is a two-dimensional carbon nanomaterial composed of monolayers of carbon atoms arranged in a honeycombed network.Because of its outstanding property,such as excellent conductivity,large specific surface area,and superior mechanic property and other outstanding properties,which has aroused great interest in the fields of electrochemistry and materials science.Herein,polymeric ionic liquids and graphene were utilized as matrix for the fabrication of PB based nanocomposites repectively.The main context of the thesis was summarized as f'ollow:1.Based on electrostatic interaction,PILs modified silica microspheres was synthesized and characterized.Because of the special weak reducibility of the modified PILs,PB nanoparticles can be in-situ growed on the surface of SiO2 microspheres in situ without adding any reducing agent.The as prepared SiO2/PB composite microspheres characterized by the means of FT-IR,UV-Vis,XRD,TEM,SEM and EDX.Moreover,such nanocomposite was also utlized to construct SiO2/PB/GC modified electrode.The electrochemical properties and electrocatalytic performance toward the reduction of H2O2 was also investigateed.2.Series of graphene/Prussian blue nanocomposites were synthesized by hydrothermal and non-hydrothermal methods respectively.It has been found that the utilization of hydrothermal process can not only well reduced graphene oxide(GO)to graphene,but also can further growth PB nanoparticle on the as synthesized graphene.Based on that,a novel 'one pot' hydrothermal synthetic method was established for the green synthesis of PB-graphene nanocomposite.Moreover,PB/GO nanocomposite was also prepared the in situ growth of PB on graphene oxide nanosheet through a simple non-hydrothermal method.The structure and morphology above mentioned nanocomposites were characterized by FT-IR,UV-Vis,XRD,TEM,SEM.The electrochemical properties and electrocatalytic performance toward the reductio of H2O2 of the as prepared PB/GP nanocomposites were also investigated.