Preparation Of Electrospinning Fibers Dopping With Inorganic Particles And Its Photo-catalytic Properties

Nano-MnO2 particles were prepared by electrolysis technique. PVP/MnO2 fibers and carbon rod wrapped tightly by PVP/MnO2 fibers were got by electrospinning technique. Under the protection of N2, the nano-MnO2 immobilized electrode sintered at 550℃was obtained. Ultra-fine fibers were characterized by the use of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and infrared absorption spectroscopy (FT-IR).One-dimensional ZnO-TiO2 coaxial nanofibers with high photo-catalytic activity have been successfully synthesized by a simple combination method of sol-gel process and electrospinning technique. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermo-gravimetric analysis (TGA), infrared absorption spectroscopy (FT-IR),X-ray diffraction (XRD) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis) were used to characterize the synthesized coaxial nanofibers. The significant red-shift was happened to the lower band energy of ZnO-TiO2 coaxial nanofibers. The photo-catalytic activity of the ZnO-TiO2 coaxial nanofibers was much higher than that of pure ZnO, TiO2 and blending ZnO/TiO2 nanofibers. The ZnO-TiO2 coaxial nanofibers were recycled four times without the decrease of the photo-catalytic activity.Using single rotating copper needle as a collector, double helical micro-rope was directly fabricated by electrospinning with two spinnerets. The double helical multi-filament rope was characterized by SEM. The structure of the double helical rope and the mechanical properties were investigated.