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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

晶种法水热合成FeS2纳米晶

吴荣1; 郑毓峰1; 张校刚2; 孙言飞1; 徐金宝1   

  1. 1. 新疆大学物理系; 2. 新疆大学化学化工学院; 乌鲁木齐 860046
  • 收稿日期:2003-07-28 修回日期:2003-09-08 出版日期:2004-07-20 网络出版日期:2004-07-20

Hydrothermal Synthesis of Nanocrystal FeS2 by the Seed-Induced Method

WU Rong1; ZHENG Yu-Feng1; ZHANG Xiao-Gang2; SUN Yan-Fei1; XU Jin-Bao1   

  1. 1.Department of Physics; Xinjiang University; 2.School of Chemistry & Chemical Engineering; Urumqi 830046; China
  • Received:2003-07-28 Revised:2003-09-08 Published:2004-07-20 Online:2004-07-20

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摘要： 在水热体系中,加入了FeS2作为晶种,以EDTA、酒石酸为螯合剂优化反应条件,合成了FeS2纳米晶。用X射线衍射、扫描电子显微镜和透射电子显微镜进行了表征。结果表明产物为单一相黄铁矿型FeS2,纳米晶呈椭球状分布,平均粒径约20nm,其在紫外-可见光谱区内215-314nm是强吸收区,光学直接禁带宽度相对发生蓝移。并且对FeS2的形成机理进行了讨论。

关键词: FeS2纳米晶, 水热, 诱导结晶, 直接禁带宽度

Abstract: FeS2(Pyrite) nanocrystals were synthesized successfully by the hydrothermal reaction using FeS2
crystalline seed with EDTA and tartaric acid as complex additives to optimize the preparation condition. The properties of the particles were
investigated by X-ray diffraction, transmission electron microscopy and scanning electron microscopy. The results show that the product is
single-phase pyrite with an ellipse-like shape and the average particle size of about 20nm. In the ultraviolet-visible range, pyrite shows a strong
absorptivity between 215--314nm and the direct band gap takes place blue shift. The mechanism of formation of FeS2 nanocrystal was discussed
in terms of the growth process.

Key words: FeS2 nanocrystal, hydrothermal, crystalline-induced, direct band gap

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