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Structural and Optical Characterization of Rutile TiO2@SiO2Nanopowders Doped with Iron Ions

机译:铁离子掺杂金红石型TiO2 @ SiO2纳米粉的结构与光学表征

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摘要

Core-shell structures of Fe-doped nanostructured TiO2@SiO2 were synthesized through the ammonium hydroxide catalyzed hydrolysis of tetraethylorthosiliane in isopropanol media containing presynthesized Fe3+-doped rutile TiO2 nanorods. Fe3+-doped titanium dioxide were prepared from aqueous titanium (III) chloride solution in the presence of powder Fe2O3 (0-30 wt% relative to TiCl3) using hydrothermal method. The structure of the powders was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, ICP-OES, and transmission electron microscopy. The experimental results showed that the core structure appeared to be composed of rutile titania nano-crystals. The optimum dopant content was about 5 wt%. The thickness of the amorphous SiO2 shell was about 2.5 nm. Ultraviolet-Vis reflection measurements revealed that the absorption of pure TiO2 was significantly blue-shifted upon the incorporation of Fe3+ into the TiO2 host.
机译:在含有预先合成的Fe3 +掺杂的金红石型TiO2纳米棒的异丙醇介质中,通过氢氧化铵催化四乙基原硅酸根的水解反应,合成了Fe掺杂的纳米TiO2 @ SiO2的核-壳结构。使用水热法,在粉末Fe2O3(相对于TiCl3为0-30 wt%)存在下,由氯化钛(III)水溶液制备Fe3 +掺杂的二氧化钛。通过X射线衍射,X射线光电子能谱,ICP-OES和透射电子显微镜来表征粉末的结构。实验结果表明,核结构似乎由金红石型二氧化钛纳米晶体组成。最佳掺杂剂含量为约5重量%。无定形SiO 2壳的厚度为约2.5nm。紫外-可见反射测量表明,将Fe3 +掺入TiO2主体后,纯TiO2的吸收发生了明显的蓝移。

著录项

  • 来源
    《Journal of the American Ceramic Society》 |2011年第10期|p.3547-3551|共5页
  • 作者

    Jing Chen; MingShu Yang;

  • 作者单位

    Polymers and Composites Division, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China,Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry,Chinese Academy of Sciences, Beijing 100190, China;

    Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry,Chinese Academy of Sciences, Beijing 100190, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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  • 入库时间 2022-08-17 13:39:27

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