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首页> 外文期刊>RSC Advances >Construction of full-spectrum-driven Ag-g-C3N4/W18O49 heterojunction catalyst with outstanding N-2 photofixation ability
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Construction of full-spectrum-driven Ag-g-C3N4/W18O49 heterojunction catalyst with outstanding N-2 photofixation ability

机译：具有优异的N-2光致电力的全光谱驱动AG-G-C3N4 / W18O49异质结催化剂的构建

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摘要

More than half of the solar spectrum is near infrared (NIR) light, which is seldom utilized in photocatalytic reactions. In this work, an Ag-g-C3N4/W18O49 heterojunction catalyst is prepared and used for full-spectrum-driven N-2 photofixation from the UV to the NIR region for the first time. X-ray diffraction, N-2 adsorption, UV-Vis-NIR spectroscopy, thermogravimetric analysis, photoluminescence, X-ray photoelectron spectroscopy and electrochemical impedance spectra were used to characterize the prepared catalysts. The result indicates that the as- prepared Ag-g-C3N4/W18O49 heterojunction catalysts display much higher N-2 photofixation performance than that of individual W18O49 or Ag-g-C3N4, which should be due to the better separation rate of electron- hole pairs and more efficient light utilization. g-C3N4 is the active component in the catalyst for N-2 photofixation. Ag loading promotes the separation rate of electron-hole pairs. W18O49 plays a role as light absorber in the full-spectrum to form more photogenerated electrons for recombining the holes in the g-C3N4 through "Z-scheme" mechanism. A possible electrons transfer route is proposed.
机译：超过一半的太阳光谱是近红外（NIR）光，很少用于光催化反应。在这项工作中，制备Ag-G-C3N4 / W18O49异质结催化剂并首先用于从UV到NIR区域的全谱驱动的N-2光复制。 X射线衍射，N-2吸附，UV-Vis-Nir光谱，热重分析，光致发光，X射线光电子能谱和电化学阻抗光谱用于表征制备的催化剂。结果表明，如制备的Ag-G-C3N4 / W18O49杂交常数催化剂显示器比单独的W18O49或Ag-G-C3N4的N-2光混膜性能更高，这应该是由于电子孔的较好分离速率对和更有效的光线利用。 G-C3N4是N-2光复制催化剂中的活性组分。 Ag Loading促进电子孔对的分离率。 W18O49在全光谱中起作用的作用，以形成更多的光生电子以通过“Z形方案”机构在G-C3N4中重新组合孔。提出了一种可能的电子传输路线。

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  • 来源
    《RSC Advances》 |2017年第68期|共8页
  • 作者

    Liang Hongyu; Li Jianzhong; Tian Yanwen;

  • 作者单位

    Northeastern Univ Sch Met Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Sch Met Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Sch Met Shenyang 110819 Liaoning Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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