Fabricate CdS Nanomaterials via Electrospinning and Microwave Processes and their Photocatalytic Performance under Visible Lighting

• Main Authors: Wu, Zong-Sian, 吳宗憲
• Other Authors: Fu, Yaw-Shyan
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/93k43r

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).