Synthesis,characterization And Electrochemical Properties Of The Anderson Type Polyoxometalates Based Carbon Nanomaterials

Polyoxometalates(POMs)are in a new field that belongs to a subset of metal oxides.POMs are a class of environmentally friendly functional materials.Anderson type POMs complexes can be used in weakly acidic and near neutral conditions.Therefore,research and application around Anderson type complexes have been extensively carried out and have a very good therapeutic effect in anti-tumor and anti-virus.This type of polyquaternic acid is rich in new species,and it will expand the application space for the research of POMs chemistry.Anderson type POMs is also an acid catalyst with excellent structure and can be used as an alternative to traditional corrosive inorganic acid reaction.But the specific surface area of solid POMs is small and difficult to separate and recover.The development of new highly catalyzed and recyclable polyacid complex catalytic materials has become a hotspot in today's research.Graphene is an excellent electronic functional material with very high electron mobility,high specific surface area and good light transmission properties,making itself have a wide range of application prospects in biocatalytic,transparent electrodes,supercapacitors and integrated circuits and other fields.In this paper,a series of Anderson type POM / GSs nanocomposites were designed and synthesized with Anderson type POMs and graphite as raw materials,and the electrochemical properties of the composites were studied deeply.The main research work is as follows:1.Improved Hummer's method for the synthesis of Anderson type POM/GSs composites.The Anderson type POM/GSs composites were synthesized by modified hummer's method.The structure of the composites was characterized by FT-IR,XRD,Raman,TG and SEM.The results show that the structure of Anderson type polyacid and graphene in the composites is kept intact,and there are strong chemical bonds and effects between polyacid and graphene.2.In-situ Synthesis of Anderson type POM/GSs composites by primary oxidation.In this chapter,the mechanism of hummer's synthesis of oxidized graphite is discussed and analyzed in detail.The effect of oxidant during hummer's method of production of oxidized graphite was compared controlling variables,The method of synthesis of oxidized graphite was further improved on the basis of improved hummer's method-In-situ synthesis of sxidized graphite by primary oxidation.The characterization of XRD shows that the structure of graphite oxide prepared by primary oxidation is complete.On this basis,a series of Anderson type POM/GSs composites were synthesized in situ.The structures of the composites were characterized byFT-IR,XRD,Raman,TG and SEM.The results show that the structure of Anderson polyacids and graphene in the composites is intact,and there is a strong chemical bond between them.3.Electrochemical Behavior of Anderson type POM/GSs Composites.Based on the carbon paste electrode,the modified electrode of the Anderson type POM/GSs composite was prepared by drop coating method and subjected to cyclic voltammetry test.The results of the composites prepared by the two methods were compared and analyzed.The results of cyclic voltammetry showed that the redox behavior of aluminum molybdic acid and molybdenum molybdate graphene composites was good.Chromium molybdate,cobalt molybdic acid and molybdenum molybdate graphene composites have only one reduction peak,and the analysis is considered to be due to the irreversible reduction process of single electrons.