Electrospinning Metallized Composite Nanofibers And Their Application In Glucose Sensing

Electrospinning technology is high in efficiency,simple in operation,extensible and adjustable.It is usually used to prepare metallized nanofibers by combining with subsequent carbonization or calcination.In this thesis,functional nanofibers with different structures were designed by different electrospinning method and subsequent process.The morphology,structure and electrochemical properties of nanofibers were analyzed.Non-enzymatic glucose electrochemical sensors were constructed by the metallized nanofibers,which exhibited high performance.This thesis includes the following two aspects:1.Carbon nanofibers(CNF)loaded with Cu Sn nanoparticles were synthesized by electrospinning for glucose detection.CNF is an excellent substrate material for loading metal(oxide)nanoparticles because of its large specific surface area,excellent electrical,chemical and mechanical properties.Cu Sn/CNFs were synthesized by carbonizing electrospun precursor.The electrospun Cu(Ac)₂/Sn(Ac)₂/PAN precursor nanofibers were stabilized at 250?,and then carbonized to Cu Sn/CNFs at 600? under the protection of Ar.The morphology,structure and electrochemical properties of Cu Sn/CNFs were characterized.Under optimal parameters,Cu Sn/CNFs/GCE exhibited wide linear range(0.1–9,000?M),low detection limit(0.08?M),good reproducibility and storage stability for glucose.The sensor was applied to the determination of glucose concentration in human serum samples.2.Hollow Cu O/Ni O heterojunction nanofibers(Cu O/Ni O NFs)were synthesized by coaxial electrospinning and applied in glucose detection.Coaxial electrospinning is a simple method to synthesize hollow nanofibers.The large specific surface area of hollow nanofibers and the heterojunction structure of Cu O-Ni O improved the electrochemical performances of Cu O/Ni O NFs.Hollow Cu O/Ni O NFs was prepared by calcining precursor nanofibers in air.The effects of the ratio of Cu O and Ni O in morphology,structure,and electrochemical properties of hollow Cu O/Ni O NFs were investigated.The Cu O/Ni O NFs with the molar ratio of 2:5 were selected to construct glucose electrochemical sensor.Under optimum parameters,its current responses of glucose showed good linear relationship in the range of 1–10,000??,sensitivity with1324.17?A/m M/cm²,and limit of detection with 0.85?M.The sensor can be used to measure blood glucose levels in human.