| Summary: | 碩士 === 國立臺南大學 === 材料科學系碩士班 === 102 === In this study, we find the optimum fiber diameter by changing the viscosity, applied voltage, flow rate, and electrode distance.The electrospinning experiment that, PVB content of 10 wt%, the voltage was 14 kV, the flow rate was 1.2 mL / h, working distance of 7 cm, to get the best CdS / PVB composite fiber having a diameter of 400-600 nm. We use three kinds of synthetic methods. (1) Hydrothermal method CdS / PVB fiber precursor obtained via reaction of 180 ˚ C nano-rod product of 24 hours, with an average size of about 100-300 nm.(2) By high-temperature calcination 450 ˚ C for 1 hour in to get particulate structure.(3)The CdS / PVB fiber precursor 700W microwave assisted by maintaining for 1 minute was repeated two times to obtain an average size of about 300-500 nm CdS / PVB composite fiber. By photocatalytic degradation of dye experiment, CdS under visible light irradiation produced / PVB composite photocatalytic activity, the degradation of 80% has a better degradation efficiency. The structure, morphology, composition and optical property of the sample was characterized using an X-ray diffraction (XRD), transmission electron microscopy (TEM), an energy dispersive X-ray spectroscope (EDX),and scanning electron microscopy (SEM).
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