文献类型：期刊文献

英文题名：The preparation of PVA-Pt/TiO₂ composite nanofiber aggregate and the photocatalytic degradation of solid-phase polyvinyl alcohol

作者：He, CH; Gong, J

机构：[1]E China Univ Sci & Technol, Dept Chem Engn, Shanghai 200237, Peoples R China;[2]NE Normal Univ, Dept Chem, Changchun 130024, Peoples R China

年份：2003

卷号：81

期号：1

起止页码：117

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000183134300014)】；

语种：英文

外文关键词：polyvinyl alcohol; nanosize fiber; photocatalytic degradation; Pt/TiO2 photocatalyst

摘要：Polyvinyl alcohol(PVA)-Pt/TiO2 composite nanofiber aggregate was prepared by electrospinning method and the photocatalytic degradation of solid-phase PVA was investigated. The experimental results showed that the 150-350 nm PVA-Pt/TiO2 composite fiber could be obtained from the PVA-Pt/TiO2 sol-like system by the electrospinning method and the photocatalytic technique was effective for the degradation of solid-phase PVA in this fiber. The weight loss of PVA depended on the wavelength of UV light and the irradiation time; it reached 78.5 and 40.2%, respectively under average 250 and 360 nm UV light irradiation for 16 h. The degradation rate of PVA in composite fiber was higher than that in composite film under identical conditions. The samples were characterized by scanning electron microscopy (SEM), X-ray energy dispersive spectrometer (EDS), X-ray diffraction (XRD), Ultraviolet-visible diffuse reflectance spectroscopy (UV-vis) and Fourier transform infrared (FT-IR) techniques. The possible mechanism of PVA degradation was also discussed in this paper. (C) 2003 Elsevier Science Ltd. All rights reserved.