Fabrication Of Transition Metal Macrocycles/Graphene Composites And Theirs Application In The Field Of Electrochemistry

Metal macrocycle compounds,with highly conjugated ?-electron system, macrocyclic hollow channel, considerable specific surface area, prominent electromagnetic properties,have received great attention. Considering the conjugated structure of metal macrocycle compound with rapid electron transmission capacity and the macrocyclic hollow channel of metal macrocycle compound with a large number of exposed active sites, they can be used as electrocatalysts. Graphene(Gr), a single layer of sp2-bonded carbon atoms extended to form a two-dimensional nanostructure, has many advantages, including the perfect hybrid structure, a high theoretical specific surface area, large conjugated system and low price.Therefore, graphene was usually used as electrochemical catalyst carriers. The composite materials involving in graphene and transition metal macrocyclic compounds will become one of the potential candidates for various applications, such as senors, fuel cells and photovoltaic conversions.The main focus of this article is committed to researching the performance of the composite materials of metal porphyrin or metal phthalocyanine with functionalized graphene in electrochemical sensors. The PFeTPP/PSS-PSS/Gr and NiTPPc/N-S-G was prepareted by solvothermal method and applied in the detection of dopamine(DA) and bisphenol A(BPA), respectively. The morphology characterization was investigated by transmission electron microscope(TEM). The interaction between metal macrocyclic compounds and graphene was analyzed by UV-vis absorption spectroscopy(UV-vis),Fourier transform infrared spectroscopy(FTIR) and X-ray electron diffraction spectroscopy(XPS). And the catalytic performance of catalysts has carried through cyclic voltammetry(CV), electrochemical impedance spectroscopy(EIS) and differential pulse voltammetry(DPV) measurements. The results show that both two composites display good electrocatalytic activity, selectivity, high sensitivity, low detection limit towards the detection of target objects. Our proposed sensors also exhibit extraordinary performance for real sample detection and will become promising materials for practical applications.