东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (12): 1200-1203.DOI: -

• 论著 • 上一篇    下一篇

Co_3O_4/Fe_2O_3核-壳粒子的制备及光学性能研究

张霞;赵岩;张彩碚;李艳华;   

  1. 东北大学理学院;中国科学院金属研究所;东北大学理学院;大连大学环境与化学工程学院 辽宁沈阳110004;辽宁沈阳110016;辽宁沈阳110004;辽宁大连116622
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-12-15 发布日期:2013-06-24
  • 通讯作者: Zhang, X.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50202014)

Preparation of Co3O4/Fe2O3 core-shell particles and their optic properties

Zhang, Xia (1); Zhao, Yan (2); Zhang, Cai-Bei (1); Li, Yan-Hua (3)   

  1. (1) School of Sciences, Northeastern University, Shenyang 110004, China; (2) Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China; (3) College of Environment and Chemical Engineering, Dalian University, Dalian 116622, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-12-15 Published:2013-06-24
  • Contact: Zhang, X.
  • About author:-
  • Supported by:
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摘要： 在单分散准球形-αFe2O3纳米颗粒的悬浮液中,在氨碱催化下,CoCl2水解产生的Co(OH)2沉积在-αFe2O3纳米颗粒表面,形成核-壳粒子.经500℃热处理后,壳层物质晶化为立方晶系Co3O4,壳层厚度约为6 nm.不同的氨碱液对核-壳结构产生影响,在1 mol.L-1尿素溶液的催化下,得到均匀的核-壳结构.应用TEM和XRD分析了产物结构,并利用UV-Vis光谱对复合材料的光吸收特性进行了研究.与-αFe2O3纳米颗粒的吸收光谱比较,在光激发下,Co3O4/Fe2O3核-壳粒子光吸收特性发生改变,在可见光区产生新的强吸收峰.

关键词: 单分散, 准球形-αFe2O3, Co3O4/Fe2O3, 核-壳粒子, 表面包覆, 紫外-可见吸收光谱

Abstract: The amorphous Co(OH)2 obtained from the hydrolysis of CoCl2 under the catalysis of ammoniac base could be deposited on the surface of monodispersed pseudo-spherical α-Fe2O3 nanoparticles to form core-shell particles. After the heat treatment at 500°C, the structure of shell layer crystallized into cubic Co3O4 with a thickness about 6 nm. Different ammoniac bases and their concentrations would affect the structure of the core-shell particles, and it became homogeneous if catalyzed in 1 mol · L-1 urea solution. TEM and XRD were used to analyze the structure of the core-shell particles. Compared to pure α-Fe2O3 nanoparticles, the UV-Vis spectrum of the core-shell particles showed that their optic properties were changed under photoexcitation and a new absorption peak with maximum absorbance appeared in visible region.

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