Preparation And Characterization Of Hollow Nanofibres And Nanocables Via Coaxial Electrospinning Route

Nanotubes have attracted great considerable attention recently due to their unique physical chemical properties and their potential applications in catalysis, medicine, nanoelctronics and optoelectronic nanodevices. In this dissertation,coaxial electrospinning was explored to synthesize organic/inor -ganic oxides hollow nanofibres and coaxial nanocables, meanwhile the structures of prepared nanomaterials have also been studied.For the first time, PVP hollow nanofibres, TiO₂ hollow nanofibres and TiO₂@SiO₂ coaxial nanocable with diameters ranging from 90nm-1μm, length up to 300μm-400μm have been successfully synthesized by coaxial electrospinning. Their structure have been studied by SEM, TEM, XRD, EDS and FTIR. Some parameters, for example, flow rate, immiscible and miscible properties of electrospun solutions, concentration, spinneret size, voltage, working distance, were also discussed. By discussing the formation mechanisms of hollow nanofibres and coaxial nanocables, some useful results were obtained, which will have some reference value for further study of one-dimensional nanostructures materials.