Imaging Science and Photochemistry ›› 2015, Vol. 33 ›› Issue (5): 374-382.DOI: 10.7517/j.issn.1674-0475.2015.05.374

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Formation Process of TiO2 Hollow Nanofibers Covered with CdS Ultrathin Nanosheets

ZHANG Guoqiang1,2, QU Dan1,2, MIAO Xiang1,2, ZHANG Xiaoyan1,2, SUN Zaicheng1   

  1. 1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Changchun 130033, Jilin, P. R. China;
    2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2015-04-27 Revised:2015-06-05 Online:2015-09-16 Published:2015-09-16


We synthesize the PVP-TBT-Cd(Ac)2 nanofibers with about 250 nm in diameter by electrospinning technology. After calcination in air and hydrothermal treatment in Na2S aqueous solution, TiO2 hollow nanofibers covered with CdS ultrathin nanosheets are formed. The formation process is as follows: the nanofibers are composed of the CdO and TiO2 nanoparticles after calcination. When hydrothermal treatment in Na2S aqueous solution, the CdO nanoparticles are dissolved and formed CdS nanosheets covered TiO2. Due to the dissolution of CdO nanoparticles, the hollow nanofibers composed of TiO2 nanoparticles are formed. The TiO2@CdS nanocomposites have the best H2 production rate when the molar ratio of Ti/Cd is 1/1. The H2 production rate of TiO2@CdS nanocomposites is about 19.7 and 3.4 μmol/h for 50 mg sample under 300 W Xe lamp without and with a UVCUT-420 nm filter, respectively.

Key words: electrospinning, CdS nanosheets, TiO2 hollow structure, formation process, photocatalytic H2 production