| 海藻酸锌纤维热降解法制备氧化锌纳米结构 |
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| 引用本文： | 孔庆山,吴兴隆,郭玉国,王乙潜,夏延致,于建,刘海华,段晓峰.海藻酸锌纤维热降解法制备氧化锌纳米结构[J].物理化学学报,2008,24(12):2179-2184. |
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| 作者姓名： | 孔庆山 吴兴隆 郭玉国 王乙潜 夏延致 于建 刘海华 段晓峰 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金
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科技部重大基础研究前期研究专项项目
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| 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.
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| 关 键 词： | 海藻酸锌纤维 氧化锌 纳米棒 热降解 |
| 收稿时间： | 2008-08-27 |
| 修稿时间： | 2008-09-23 |
Preparation of ZnO Nanostructures by Thermal Degradation of Zinc Alginate Fibers |
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| KONG Qing-Shan,WU Xing-Long,GUO Yu-Guo,WANG Yi-Qian,XIA Yan-Zhi,YU Jian,LIU Hai-Hua,DUAN Xiao-Feng.Preparation of ZnO Nanostructures by Thermal Degradation of Zinc Alginate Fibers[J].Acta Physico-Chimica Sinica,2008,24(12):2179-2184. |
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| Authors: | KONG Qing-Shan WU Xing-Long GUO Yu-Guo WANG Yi-Qian XIA Yan-Zhi YU Jian LIU Hai-Hua DUAN Xiao-Feng |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Zinc alginate fiber ZnO Nanorod Thermal degradation |
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