AbstractThe almost monodisperse three dimensional (3D) porous CeO2hollow nanospheres with a diamet'/> Controllable template-free hydrothermal synthesis of 3D porous CeO_2 hollow nanospheres and their optical performances
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Controllable template-free hydrothermal synthesis of 3D porous CeO_2 hollow nanospheres and their optical performances

机译:3D多孔CeO_2空心纳米球的无模板无水热合成及其光学性能

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摘要

AbstractThe almost monodisperse three dimensional (3D) porous CeO2hollow nanospheres with a diameter of about 200–500 nm and rough surface have been synthesized by a facile template-free hydrothermal route. It was found that each hollow spherical nanostructure is composed of numerous nubbly nano-particles with several decade nanometers in diameter as the building blocks, which are randomly assembled with lower density to form a 3D porous structure. Many characterization means have been employed to study the CeO2hollow nanospheres, including X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, Raman, and ultraviolet–visible spectrum. The 3D CeO2hollow nanospheres own a cubic fluorite structure and many Ce3+ions and oxygen vacancies exist in their surface. The morphology structure of samples, size of building blocks, and the oxygen vacancies may be the reason for the red-shifted in band gap of the 3D CeO2hollow nanospheres.
机译: 摘要 几乎单分散的三维(3D)多孔CeO 2 空心纳米球,具有直径约200-500 nm且表面粗糙的方法是通过简便的无模板水热法合成的。已经发现,每个空心球形纳米结构均由许多直径为几十纳米的成核的纳米颗粒构成,它们以较低的密度随机组装以形成3D多孔结构。已经使用了许多表征手段来研究CeO 2 空心纳米球,包括X射线衍射,X射线光电子能谱,扫描电子显微镜,透射电子显微镜,拉曼光谱和紫外可见光谱。 3D CeO 2 空心纳米球具有立方萤石结构,表面存在许多Ce 3 + 离子和氧空位。样品的形态结构,结构单元的大小和氧空位可能是3D CeO 2 空心纳米球带隙红移的原因。

著录项

  • 来源
    《Journal of materials science》 |2018年第6期|4961-4966|共6页
  • 作者单位

    School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University;

    School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University;

    School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University;

    School of Physical and Mathematical Sciences, Nanjing Tech University;

    School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University;

  • 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 13:43:30

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