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化学学报
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化学学报 ›› 2004, Vol. 62 ›› Issue (21): 2177-2181. 上一篇    下一篇

研究论文

介观结构SiO2/CdO纳米复合物为前驱体原位水热合成半导体CdSe和CdS纳米晶

杨海峰, 闫妍, 张福强, 陈颖, 屠波, 赵东元   

  1. 复旦大学化学系, 分子催化与先进材料实验室, 上海, 200433
  • 投稿日期:2004-01-13 修回日期:2004-04-16 发布日期:2014-02-17
  • 通讯作者: dyzhao@fudan.edu.cn
  • 作者简介:赵东元,E-mail:dyzhao@fudan.edu.cn;Fax:021-65641740
  • 基金资助:
    国家自然科学基金(Nos.20101002,20373013)、科技部973重大基础研究项目(No.2001CB610505)、上海市纳米科技发展促进中心(0212nm043)及复旦大学研究生创新基金资助项目.

In situ Hydrothermal Synthesis of Semiconductor CdS and CdSe Nanocrystals by Using Mesostructured SiO2/CdO Composites as Precursor

YANG Hai-Feng, YAN Yan, ZHANG Fu-Qiang, CHEN Ying, TU Bo, ZHAO Dong-Yuan   

  1. Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433
  • Received:2004-01-13 Revised:2004-04-16 Published:2014-02-17

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以高度有序的介观结构SiO2/CdO纳米复合物为前驱体,在硒源或硫源存在的还原性条件下,利用原位水热反应,合成了介观结构SiO2/CdSe及SiO2/CdS纳米复合物,除去SiO2后,得到半导体CdSe及CdS纳米晶.通过X射线衍射(XRD),高分辨率透射电镜(HRTEM),X射线能散射谱(EDX)及选区电子衍射(SAED)等手段对产物进行了组成和结构表征.结果表明,介观结构SiO2主体材料在合成过程中起到了一定的形貌和尺寸限制作用,得到的CdSe和CdS均为直径在8 nm左右的类球形六方相纳米晶.

关键词: 介观结构, 纳米复合材料, 半导体化合物, 纳米晶, 水热反应

By using mesostructured SiO2/CdO composites as a precursor, uniform sphere like CdSe and CdS nanocrystals have been synthesized under a reductive condition. In situ hydrothermal phase transition reactions of SiO2/CdO composites with non metal S or Se were firstly employed. Components and structures of the final products were characterized with X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), X-ray energy dispersive spectra and selected area electron diffraction (SAED). The results show that the mesostructured silica host provides a confinement effect on the size and morphology of the derived nanocrystals. Those CdSe and CdS nanoparticles are both 8 nm in diameter and highly crystallined with hexagonal lattices.

Key words: mesostructure, nanocomposite, semiconductor, nanocrystal, hydrothermal synthesis