物理化学学报 >> 2010, Vol. 26 >> Issue (09): 2557-2562.doi: 10.3866/PKU.WHXB20100834

材料物理化学 上一篇    下一篇

Cu7S4纳米管的生物分子辅助水热合成与光学性质

郭培志, 韩光亭, 王宝燕, 赵修松   

  1. 1. 青岛大学化学化工与环境学院,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;
    2. Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
  • 收稿日期:2010-02-03 修回日期:2010-04-17 发布日期:2010-09-02
  • 通讯作者: 郭培志 E-mail:pzguo@qdu.edu.cn
  • 基金资助:

    国家自然科学基金(20803037), 山东省博士基金(2007BS04022),山东省自然科学基金(ZR2009BM013)和“泰山学者”计划资助项目

Biomolecule-Assisted Hydrothermal Synthesis and Optical Properties of Cu7S4 Nanotubes

GUO Pei-Zhi, HAN Guang-Ting, WANG Bao-Yan, ZHAO Xiu-Song   

  1. 1. Laboratory of New Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, School of Chemistry, Chemical Engineering and Environmental Sciences, Qingdao University, Qingdao 266071, Shandong Province, P. R. China;
    2. Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, ingapore 117576
  • Received:2010-02-03 Revised:2010-04-17 Published:2010-09-02
  • Contact: GUO Pei-Zhi E-mail:pzguo@qdu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20803037), Doctoral Foundation of Shandong Province (2007BS04022), Natural Science Foundation of Shandong Province (ZR2009BM013), and“Taishan Scholar”Programof Shandong Province, China.

摘要:

使用生物分子DL-甲硫氨酸辅助水热方法合成Cu7S4纳米管, 产物的形貌与晶型可通过改变实验参数进 行调控. 研究表明, 硝酸铜和DL-甲硫氨酸在反应开始时的配位比为1:2, 而且当反应物的摩尔比为1:2和反应温 度为200oC时可合成直径为100-600 nm、长度达40-100 μm的多晶Cu7S4纳米管.使用D-或L-甲硫氨酸均能得到类 似Cu7S4纳米管. Cu7S4纳米管的禁带宽度为2.88 eV, 与Cu7S4的块体材料相比有明显蓝移. 基于实验研究结果, 讨 论了甲硫氨酸分子中的官能团与反应产物之间的联系并提出了Cu7S4纳米管的自牺牲模板法形成机理.

关键词: 水热合成, Cu7S4纳米管, 甲硫氨酸, 生物分子

Abstract:

Cu7S4 nanotubes were synthesized using a biomolecule DL-methionine-assisted hydrothermal method. The morphology and phase of the products can be controlled by adjusting the reaction parameters such as synthesis temperature, reaction time and the molar ratio of the reagents. We found that uniform polycrystal Cu7S4 nanotubes with diameters of 100-600 nm and lengths of 40-100 μm can be controllably synthesized at 200oC when the molar ratio of Cu(NO3)2 to DL-methionine in the synthesis system is 1:2. Similar Cu7S4 nanotubes can be obtained from D-or L- methionine systems. The bandgap energy of the Cu7S4 nanotubes was measured to be about 2.88 eV, a remarkable blue shift in comparison with that of bulk Cu7S4 (2.0 eV). We discussed the relationship between the products and the functional groups in the amphiphilic biomolecules. On the basis of our experimental data, we proposed that the Cu7S4 nanotubes were formed versus a self-sacrificing template mechanism.

Key words: Hydrothermal synthesis, Cu7S4 nanotube, Methionine, Biomolecule