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室温氧化还原反应制备AgCuSe三元纳米棒(英文)

Room Temperature Redox Reaction To Prepare AgCuSe Ternary Nanorods

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【作者】 张悠金胡标张祖德钱逸泰

【Author】 Zhang Youjin, Hu Biao, Zhang Zude, Qian Yitai(Department of Chemistry, University of Science and Technology of China, Hefei 230026)

【机构】 中国科学技术大学化学系中国科学技术大学化学系 合肥230026合肥230026合肥230026

【摘要】 在室温下通过氧化还原反应制备了AgCuSe三元纳米棒.用X射线粉末衍射、透射电镜和X射线光电子能谱对产物进行了表征.X射线粉末衍射结果表明,产物是四方相AgCuSe;透射电镜结果表明,产物是纳米棒,其直径为5~20nm,长度为200~600nm;X射线光电子能谱结果表明,产物的纯度是很高的,没有单质Ag、Cu等杂质.应用化学热力学原理讨论了产物AgCuSe的生成机理.热力学计算表明,在这个反应体系中最终产物是纯AgCuSe.溶剂乙二胺不仅作为双齿配体与Ag+和Cu+形成稳定的配合物,而且还能溶解金属硒、增强硒的反应性,乙二胺在控制AgCuSe的成核和纳米棒的生长过程中起着重要的作用.

【Abstract】 AgCuSe nanorods were prepared at room temperature by a redox reaction. The as-prepared product was characterized by X-ray powder diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. X-ray powder diffraction shows that the as-prepared product is the tetragonal phase of AgCuSe. Transmission electron microscopy shows that the sample consists of nanorods with a diameter varying from 5 nm to 20 nm and a length varying from 200 nm to 600 nm. X-ray photoelectron spectroscopy shows that the purity of the sample is high. The formation mechanism of AgCuSe and the growth mechanism of AgCuSe nanorods were discussed. Thermodynamic calulations show that the final product in the synthetic system is pure AgCuSe. The solvent ethylenediamine did not only acts a didentate ligand to form relatively state Ag~+ and Cu~+ complexes, but also dissolved Se and enhanced the reactivity of Se. It played an important role in controlling the nucleation and growth of AgCuSe nanorods.

【关键词】 三元纳米棒AgCuSe制备表征机理
【Key words】 Ternary nanorodsAgCuSePreparationCharacterizationMechanism
  • 【文献出处】 化学物理学报 ,Chinese Journal of Chemical Physics , 编辑部邮箱 ,2005年04期
  • 【分类号】O614.1
  • 【被引频次】5
  • 【下载频次】137
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