Abstract
The TiO2@SiO2 coaxial hollow olive-shaped cable has been prepared by using the three-layer coaxial electrospinning technique. This technique also can be used to prepare the coaxial olive-shaped cable of other inorganic substances. In this paper the samples were characterized adopting many-ways such as differential thermal analysis (TG-DTA) and X-ray diffractometry (XRD), infrared spectrograph (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectrometer (EDS) techniques. XRD analysis and FTIR analysis show that the coaxial hollow olive-shaped cable obtained at 600℃ has an inner wall of crystalline TiO2 and an outer wall of amorphous SiO2. SEM analysis and TEM analysis show that the coaxial hollow olive-shaped cable is formed after sintering at 600℃. Its middle diameter is about 1.4um, the terminal diameter is about 210nm, the thickness of the inner wall is about 200nm, the shell thickness is about 100nm and the length of the shell is about 5um. However, after sintering at 800℃, the olive-shaped hollow tube collapses. EDS analysis shows that the sintered samples mainly contain three elements which are O, Si and Ti. The formation mechanism of the TiO2@SiO2 hollow olive-shaped cables is preliminarily investigated.
