| ITO is a kind of transparent conducting material, which has been applicated in the field of photoelectric technology. In this paper, ITO nanofibers with different morphologies were prepared by centrifugal spinning and a post-calcination process, and then ITO nanofibers were coated on quartz optical fibers which could endow quartz optical fiber the properties of transparence, conduction and light propagation. ITO-coated optical fibers have been looking forward to be applied to sensor field. The heat loss, morphology, composition, crystal structure and specific surface area of ITO fibers were analyzed by thermo-analysis(TG), scanning electron microscopy(SEM), X-ray diffraction(XRD), transmission electron microscopy(TEM) and specific surface area analysis(BET); the photoelectric properties of ITO-coated quartz optical fibers were investigated by four-point probe, UV-visible spectrophotometer, luminance colorimeter, photoluminescence spectrophotometer(PL) and so on. This paper detailed study the influence of inorganic content ratio and calcination temperature on the structure and photoelectric properties of ITO nanofibers.The method of centrifugal spinning has no requirements on the polarity of spinning solution, which can be used to prepared nanofibers with different inorganic content. The process of preparating inorganic/PVP nanofibers need high temperature calcination to remove PVP. In order to reduce the loss, this paper attempts to increase the mass fraction of In(NO3)3·4.5H2 O to the preparation of ITO nanofibers. The effects of different PVP/In(NO3)3·4.5H2 O quality on the morphology, crystal structure, specific surface area and photoelectric properities of ITO nanofibers were researched. The results suggested that the small amount of In(NO3)3·4.5H2 O spinning solution could prepare ITO nanofibers with fine fiber diameter and compact fiber structure. However, the higher In(NO3)3·4.5H2 O quality spinning solution could prepare ITO nanofibers with coarser fiber diameter and fibers in layered-porous shape. But the effect of mass fraction of In(NO3)3·4.5H2 O on the photoelectric properties of ITO nanofibers is weak.Centrifugal spinning method can prepare ITO nanofiber with hollow structure, and changing calcination temperature can control the diameter and wall thickness of hollow fibers. The influences of different calcination temperature on ITO hollow mico/nano fiber morphology and properties were analyzed and characterized. With the increasement of calcination temperature, the pore diameter of hollow fiber increased, the grain grew bigger, and specific surface area also increased. As the morphology of ITO hollow mic/nano fiber changes, the photoelectric performance also will change.Finally a homemade optical fiber collecting device were applied to coating ITO nanofibers on the surface of quartz optical fiber, and the best ratio of spinning dope to prepare ITO nanofibers coated quartz optical fiber was explored. The photoelectric performances have been characterized, ITO coated quartz optical has a potential to create different kinds of sensors in the future. |
