物理化学学报 >> 2008, Vol. 24 >> Issue (12): 2179-2184.doi: 10.3866/PKU.WHXB20081206

研究论文 上一篇    下一篇

海藻酸锌纤维热降解法制备氧化锌纳米结构

孔庆山, 吴兴隆, 郭玉国, 王乙潜, 夏延致, 于建, 刘海华, 段晓峰   

  1. 清华大学化学工程系高分子研究所, 北京 100084; 中国科学院化学研究所, 北京 100190; 青岛大学纤维新材料与现代纺织国家重点实验室培育基地, 山东 青岛 266071; 中国科学院物理研究所北京电镜实验室, 北京 100190
  • 收稿日期:2008-08-27 修回日期:2008-09-23 发布日期:2008-12-04
  • 通讯作者: 夏延致; 于建 E-mail:yujian03@mail.tsinghua.edu.cn;qdxyzh@163.com

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 E-mail:yujian03@mail.tsinghua.edu.cn;qdxyzh@163.com

摘要: 采用天然高分子海藻酸钠为原料, 以氯化锌水溶液为凝固浴, 通过湿法纺丝技术成功制备了海藻酸锌(Alg-Zn)纤维.通过在空气中不同温度下对所得海藻酸锌纤维进行热处理, 得到了多种ZnO纳米结构. 利用热失重分析(TG)、X射线衍射(XRD)、电子能量损失谱(EELS)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和高分辨透射电子显微镜(HRTEM)等手段对产物的组成、形貌和微观结构进行了详细表征. 结果表明, 焙烧温度和时间对所得ZnO纳米结构的尺寸和形貌具有重要影响; 800 ℃下热处理24 h以上可以得到直径约为120 nm的ZnO纳米棒. 通过仔细考察不同热处理时间得到的ZnO纳米结构, 提出了在焙烧条件下ZnO纳米棒的生长机理.

关键词: 海藻酸锌纤维, 氧化锌, 纳米棒, 热降解

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

MSC2000: 

  • O648