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首页> 外文期刊>RSC Advances >Synthesis, characterization and photo-catalytic performance of meso-porous Si-N co-doped nano-spherical anatase TiO2 with high thermal stability
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Synthesis, characterization and photo-catalytic performance of meso-porous Si-N co-doped nano-spherical anatase TiO2 with high thermal stability

机译：具有高热稳定性的中间多孔Si-n共掺杂纳米球锐钛矿TiO2的合成，表征和光催化性能

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摘要

Meso-porous Si-N co-doped nano-spherical anatase TiO2 with high thermal stability and good photocatalytic activity was successfully synthesized using the hydrothermal method. Mono-dispersed amorphous Si-doped TiO2 nano-spherical micelles were produced first, through slow hydrolysis of tetrabutyl-orthotitanate (TBOT) and tetraethyl-orthosilicate (TEOS) at room temperature. Then, they were hydrothermally treated in a C2H5OH/H2O suspension using hexa-methylene-tetramine (HMT) as a nitrogen source. The final product was obtained after thermal treatment. The successful incorporation of Si and N into the TiO2 lattice was confirmed by EDS, FTIR and XPS analyses. The synergetic effect of Si and N plays an important role in improving the photo-catalytic activity. The experimental results and the first-principles density functional calculations showed that the incorporation of N enhances the visible-light-driven photo-catalytic activity, while the incorporation of Si stabilizes the anatase and prevents the oxidation of N at high temperatures.
机译：使用水热法成功地合成了具有高热稳定性和良好光催化活性的中间多孔Si-N共掺杂纳米球锐钛矿TiO2。首先通过在室温下缓慢水解四丁基官酸（TBOT）和四乙基酯（TEOS）来制备单分散的无定形Si掺杂TiO2纳米球胶束。然后，将它们使用六甲基 - 四胺（HMT）作为氮源在C 2 H 5 OH / H 2 O悬浮液中水热处理。热处理后获得最终产物。通过EDS，FTIR和XPS分析证实了Si和N的成功掺入TiO2格中。 Si和N的协同作用在改善光催化活性方面起着重要作用。实验结果和第一原理密度官能计算显示N掺入增强可见光型光催化活性，而Si的掺入稳定锐钛矿并防止N高温氧化N.

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  • 来源
    《RSC Advances》 |2016年第112期|共9页
  • 作者

    Wen PengChao; Ji WeiWei; Zhong Hao; Li Lin; Zhang Bi; Hao LuYuan; Xu Xin; Agathopoulos Simeon;

  • 作者单位

    Univ Sci &

    Technol China Chinese Acad Sci Key Lab Mat Energy Convers Dept Mat Sci &

    Engn Hefei Anhui Peoples R China;

    Univ Sci &

    Technol China Chinese Acad Sci Key Lab Mat Energy Convers Dept Mat Sci &

    Engn Hefei Anhui Peoples R China;

    Univ Sci &

    Technol China Chinese Acad Sci Key Lab Mat Energy Convers Dept Mat Sci &

    Engn Hefei Anhui Peoples R China;

    Univ Sci &

    Technol China Chinese Acad Sci Key Lab Mat Energy Convers Dept Mat Sci &

    Engn Hefei Anhui Peoples R China;

    Univ Sci &

    Technol China Chinese Acad Sci Key Lab Mat Energy Convers Dept Mat Sci &

    Engn Hefei Anhui Peoples R China;

    Univ Sci &

    Technol China Chinese Acad Sci Key Lab Mat Energy Convers Dept Mat Sci &

    Engn Hefei Anhui Peoples R China;

    Univ Sci &

    Technol China Chinese Acad Sci Key Lab Mat Energy Convers Dept Mat Sci &

    Engn Hefei Anhui Peoples R China;

    Univ Ioannina Mat Sci &

    Engn Dept GR-45110 Ioannina Greece;

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  • 正文语种 eng
  • 中图分类 化学;
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