高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (12): 2523.doi: 10.7503/cjcu20140649

• 研究论文: 无机化学 • 上一篇    下一篇

花状硫化铟纳米多级结构的液相合成及形貌调控机理

戚克振1(), 王艳1, 付嘉琦2, 王贵昌4()   

  1. 1. 沈阳师范大学化学与生命科学学院, 沈阳 110034
    2. 北京大学化学与分子工程学院, 北京 100871
    3. Department of Chemistry, College of Science, Sultan Qaboos University, Muscat 123, Sultanate of Oman
    4. 南开大学化学学院, 天津 300071
  • 收稿日期:2014-07-14 出版日期:2014-12-10 发布日期:2014-11-29
  • 作者简介:联系人简介: 王贵昌, 男, 博士, 教授, 主要从事量子化学计算和多相催化研究. E-mail:wangguichang@nankai.edu.cn;戚克振, 男, 博士, 讲师, 主要从事无机合成与材料化学研究. E-mail:qikezhen2003@gmail.com
  • 基金资助:
    沈阳师范大学青年科研基金(批准号: 054-55440109035)资助

Solution-phase Synthesis and Morphology-controlled Mechanism of Flower-like Indium Sulfide Hierarchitectures

QI Kezhen1,*(), WANG Yan1, FU Jiaqi2, Rengaraj Selvaraj3, WANG Guichang4,*()   

  1. 1. College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China
    2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
    3. Department of Chemistry, College of Science, Sultan Qaboos University, Muscat 123, Sultanate of Oman
    4. College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2014-07-14 Online:2014-12-10 Published:2014-11-29
  • Contact: QI Kezhen,WANG Guichang E-mail:qikezhen2003@gmail.com;wangguichang@nankai.edu.cn
  • Supported by:
    † Supported by the Research Fund for Young Scholars of Shenyang Normal University, China(No.054-55440109035).

摘要:

以C2H5NS和In(NO3)3为前驱物, 采用简单的液相法成功制备了In2S3纳米多级结构, C2H5NS作为硫源的同时也起到了模板剂的作用. 研究结果表明, 前驱物浓度对In2S3形貌控制起着重要作用. 随着In(NO3)3/C2H5NS 摩尔比从1:1.5增加到1:6, In2S3纳米花呈现了不同的形貌和尺寸. XRD谱图显示, In2S3纳米花晶体具有立方结构. SEM和TEM照片显示, 制备的In2S3纳米结构呈多级花状结构, 这种结构由纳米片堆积组装而成. 通过第一性原理计算并结合实验结果对C2H5NS影响纳米片生长的机理进行了分析, 结果表明C2H5NS在In2S3(001)晶面上的吸附可以有效降低晶面的表面能, 起到稳定晶面的作用; 纳米花的形成是在C2H5NS影响In2S3的晶面稳定性及其成核速率之间的一个协同效应. In2S3纳米晶的形貌可以通过调整反应溶液中的C2H5NS浓度来调节.

关键词: 硫化铟纳米花, 液相合成, 密度泛函理论, 表面能, 形貌控制

Abstract:

Flower-like In2S3 hierarchical nanostructures were successfully prepared via a facile solution-phase route, using In(NO3)3 as processor and C2H5NS as sulfur source. Our experimental results demonstrated that the morphology of the product can be easily modified by tuning the precursor ratio. The molar ratio of In(NO3)3/C2H5NS plays a crucial role in the morphology of In2S3 hierarchitectures. With the ratio increasing from 1:1.5 to 1:6, the flower-like In2S3 crystals exhibited various morphologies and different sizes. X-ray diffraction(XRD) patterns of the flowers revealed the cubic structure of In2S3; morphological studies examined by scanning electron microscope(SEM) and transmission electron microscope(TEM) showed that the synthesized In2S3 nanostructure was flower-like hierarchitecture assembled by nanoflakes. Density functional theory(DFT) calculation results indicate that the adsorption of C2H5NS can affectively and selectively reduce the surface energy of In2S3 facet, stabilize the corresponding crystal facet. The results indicate that there is a synergistic effect between C2H5NS protecting the crystal facet and the nucleation rate for C2H5NS to tune the growth of In2S3 nanoplates. Therefore, the morphology of flower-like In2S3 crystals can be controlled by adjusting the C2H5NS concentration in the mixed solvent.

Key words: In2S3 nanoflowers, Solution-based synthesis, Density functional theory, Surface energy, Morpho-logy control

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