Electrochemical Properties And Application Of Electrospun Nanocomposites With Mo Compounds

Electrospun is a new type of nanofiber processing technology.Due to the advantages of high specific surface area and porosity,electrospun nanofibers have played an important role in the fields of catalysts,supercapacitors,electrode materials and biosensors,and have gradually become an important technical means for the preparation of nanofibers.However,with the development of research,it has been found that there are some problems such as low conductivity and small specific surface area in the modified electrode of polyacid electrospinning composite nanomaterials.At present,the methods to improve the properties of electrospun nano-electrode materials are mainly by adjusting the morphology of spinning materials,introducing heteroatoms or preparing ternary composites.In this paper,electrode materials with higher specific surface area and electrocatalytic activity were prepared by using the electrostatic spinning technology with polymer and polyoxometalate or MoS₂ as raw materials,and the electrocatalytic activity and the application of sensing interface were studied.The specific research contents are as follows:In the first part of this paper,the technology of electrospinning was used.The precursor solution was prepared from Ag₃PMo₁₂O₄₀（AgPMo）and polyvinyl alcohol（PVA）.Then the inorganic/organic nanofibers were spun by electrospinning at high pressure.Finally,the PVA template was removed by high heat treatment and the inorganic nanofibers AgPMo containing carbon were prepared.AgPMo/C/GCE modified electrode was constructed.The morphology and structure of the electrode were characterized by SEM,IR,XRD and XPS.It is proved by CV and CA electrochemical technique that the modified electrode has good electrocatalytic activity to glycerin in acidic conditions.In the second part of this paper,the MoS₂ and polyvinylpyrrolidone（PVP）polymers were dissolved in ethanol and electrospun.then the PVP polymer template was removed by high-temperature calcination to obtain the inorganic MoS₂ nanofibers containing carbon.HPMo/MoS₂/C/GCE modified electrode was constructed by electrodeposition method.The morphology of the spinning material and the electrode was characterized by SEM,XRD and IR,and the electrochemical properties of the electrode were studied by CV and DPV.The results showed that the electrospun MoS₂has high porosity and large specific surface area,and can load more HPMo.In addition,the modified electrode has good catalytic activity for clenbuterol and ractopamine,with detection ranges of 0.5-1050μM and 1-120μM,respectively,and detection limits of 79 nM and 136 nM,respectively.The experimental study on animal food was carried out with the method of labeling recovery,recovery rates were96.8%-102.0%and 97.5%-103.7%,respectively.This provides a new idea for the detection of beta-receptor agonists in animal-derived food samples.