ZnO nanofibers with diameters of 150 ~ 580 nm were prepared by using electrospun PVA/zinc acetate composite fibers and drying for 8 h at 60 ℃ in vacuum with subsequent annealing for 1 h at temperatures in the range of 400 to 800 ℃ in air. The properties of ZnO fibers were characterized for various PVA concentrations and methanol contents by using X-ray diffractometer, thermal gravimetry with differential scanning calorimetry, Fourier-transform infrared spectrophotometer, scanning electron microscopy, transmission electron microscopy, viscometer, pycnometer and dynamic tensiometer measurements. Uniform and smooth fibers with diameters of 150 nm were observed for the electrospun fibers containing a PVA content of 40 g and a methanol content of 0.5 ml at a calcination temperature of 600 ℃, a flow rate of 0.1 ml/h and an electric field of 1.9 kV/cm. Experimental results suggest that the calcination temperature was most influential in determining the fiber's morphology and size.
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