标题：Large Scaled Synthesis of Heterostructured Electrospun TiO2/SnO2 Nanofibers with an Enhanced Photocatalytic Activity
作者：Zhang, Li; Yu, Wei; Han, Cui; Guo, Jiang; Zhang, Qinghong; Xie, Hongyong; Shao, Qian; Sun, Zhiguo; Guo, Zhanhu
作者机构：[Zhang, Li; Yu, Wei; Xie, Hongyong; Sun, Zhiguo] Shanghai Second Polytech Univ, Sch Environm & Mat Engn, Shanghai 201209, Peoples R China.; [Zhang, 更多 通讯作者地址：[Yu, W]Shanghai Second Polytech Univ, Sch Environm & Mat Engn, Shanghai 201209, Peoples R China;[Shao, Q]Shandong Univ Sci & Technol, Coll Chem & Envi 更多
来源：JOURNAL OF THE ELECTROCHEMICAL SOCIETY
摘要：Heterostructured TiO2/SnO2 fibrillar nanocomposites were synthesized by using electrospinning technology with the setup composed of a syringe pump with two parallel syringes on it and a rotating collector. The heterojunctions were formed between TiO2 and SnO2 nanofibers fast and efficiently on a large scale, after the fiberizing carrier polyvinylpyrrolidone (PVP) on the as-spun composite nanofibers was burnt away at 500 degrees C. The samples were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflection spectroscopy (DRS), and photoluminescence spectra (PL), respectively. The results indicated that two kinds of small nanofibers with different diameters were interconnected to form heterojunctions. Photocatalytic tests displayed that the heterostructured TiO2/SnO2 nanofibers exhibited a much higher degradation rate of methylene blue (MB), rhodamine B (RhB), and 4-chlorophenol (4-CP) than that of bare TiO2 nanofibers or Evonik P25 under UV light irradiation. The enhanced photocatalytic activity could be attributed to the effective charge separation derived from the coupling effect of TiO2 and SnO2 nanocomposites. (C) 2017 The Electrochemical Society. All rights reserved.