Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (12): 2179-2184.doi: 10.3866/PKU.WHXB20081206

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Preparation of ZnO Nanostructures by Thermal Degradation of Zinc Alginate Fibers

KONG Qing-Shan, WU Xing-Long, GUO Yu-Guo, WANG Yi-Qian, XIA Yan-Zhi, YU Jian, LIU Hai-Hua, DUAN Xiao-Feng   

  1. Institute of Polymer Science and Technology, Department of Chemical and Engineering, Tsinghua University, Beijing 100084, P. R. China; Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China; Advanced Fibers & Modern Textile Cultivation Base for State Key Laboratory, Qingdao University, Qingdao 266071, Shandong Province, P. R. China; Beijing Laboratory of Electron Microscopy, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2008-08-27 Revised:2008-09-23 Published:2008-12-04
  • Contact: XIA Yan-Zhi; YU Jian;

Abstract: Zinc alginate (Alg-Zn) fibers were obtained by wet spinning of sodiumalginate (Alg-Na) into a coagulating bath containing an aqueous zinc chloride solution. ZnO nanostructures were prepared by thermal degradation of the as-obtained zinc alginate fibers at different temperatures in air. The compositions, morphologies, and microstructures of products were investigated by thermal gravimetry (TG), X-ray diffraction (XRD), electron energy-loss spectroscopy (EELS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). Annealing time and temperature influenced final structures and shapes of ZnO nanostructures. ZnO nanorods with diameters of about 120 nm were obtained at 800 ℃ and with a reaction time of more than 24 h in air. A ZnO growth mechanism was proposed by a careful investigation of ZnO nanostructures after different thermal treatment times.

Key words: Zinc alginate fiber, ZnO, Nanorod, Thermal degradation


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