Thesis (M.Eng.)--Chulalongkorn University, 2013

ZnO particle imbedded in PVP polymer matrix were successfully fabricated by using direct-dispersed processing and electrospinning method. Configuration of PVP-ZnO nanofibers could be manipulated by dispersing ZnO in PVP which is subject to ultrasonication. Effect of ultrasonic dispersion and dispersant on the uniformity of ZnO in PVP matrix showed better microstructure uniformity. The parameters in electrospining process. It was found that the effect of charge density and weight percent of polymer on the electrospun fiber shows an important role on the average fiber diameter. For examination of fibers stability for VOC removal, The fabricated fibers were situated in a photo reactor. The irradiation UV-A could be effective to organic compound and solid-phase PVP degradation. The PVP nanofibers showed the decreasing of 58.14% of the weight of PVP. For the PVP/ZnO fibers degradation, the high ratios of PVP to ZnO fibers showed more stability of fibers than that of the small ratios of PVP to ZnO fibers. And the effect of dispersant on the photocatalytic activity showed that the dispersant on the surface of ZnO particles could decrease photocatalytic activities on catalyst surface. In this study, the most stable fiber was obtained from the PVP/ZnO fibers which were fabricated at the weight ratios of PVP to ZnO 5:10, 13 kV applied voltage, by the 12 weight percent of PVP to Ethanol.