English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 62797/95867 (66%)
造访人次 : 3734934      在线人数 : 393
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/120694


    题名: Electronic and atomic structure of TiO2 anatase spines on sea-urchin-like microspheres by x-ray absorption spectroscopy
    作者: Kuo, Hung-Wei;Lin, Chin-Jung;Do, He-Yi;Rui-YangWu;Tseng, Chuan-Ming;Kumard, Krishna;Dong, Chung-Li;Chena, Chi-Liang
    关键词: XAS Titania;Mesoporous;Photocatalyst
    日期: 2020-02
    上传时间: 2021-05-04 12:10:48 (UTC+8)
    出版者: Elsevier BV
    摘要: Titania mesoporous sea-urchin-like microspheres were successfully synthesized by two-step template-free hydrothermal method. The sea-urchin-like microspheres have TiO2 anatase phase spines. The size and shape remain unchanged with amorphous TiO2 in all the microsphere samples. Controlling the spines quantity of sea-urchin-like microspheres with different concentrations of NaBH4 precursor are expected to improve the photocatalytic ability. The 0.8 wt% NaBH4 precursor showed the highest photocatalytic activity in the degradation of acetaminophen. X-ray absorption spectroscopy results indicated that the surface spines have an anatase phase structure, slight lattice distortion as well as a variation in Ti 3d orbital orientation. The microspheres with different NaBH4 precursor concentration have a significant effect in the electronic structure and showed a strong correlation to the oxygen defect in the spines and local structural symmetry of TiO6 octahedra (Oh). More detailed spectral analysis in the unoccupied states above the Fermi level strongly points to a photon degradation. Since Ti3+ strongly influences the surface chemistry of anatase phase, the structure along with the oxygen defect and the Ti3+ ions in the spines are considered to have an essential role in the photocatalytic process of TiO2 for the photogenerated electrons and an indication of an increase in the photocatalytic activity.
    關聯: Applied Surface Science 502, 144297
    DOI: 10.1016/j.apsusc.2019.144297
    显示于类别:[電機工程學系暨研究所] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    index.html0KbHTML45检视/开启

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈