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Enhanced photoelectrochemical performance of the hierarchical micro/nano-structured TiO2 mesoporous spheres with oxygen vacancies via hydrogenation

机译:通过氢化增强分层微/纳米结构TiO2中孔球体的光电化学性能,通过氢化具有氧空位

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摘要

Hierarchical micro/nano-structured TiO2 mesoporous spheres with oxygen vacancies have been fabricated via a template-free strategy followed by hydrogenation and their photocatalytic performance has been explored. The hierarchical micro/nano-structured mesoporous spheres can act as a model architecture for efficient photoelectrochemical devices because they can simultaneously offer abundant catalytically active sites, excellent light-scattering characteristics and a highly conductive pathway for charge carriers collection. More importantly, oxygen vacancies are introduced onto the surface of TiO2 and function as shallow donors. The presence of oxygen vacancies not only boosts the light absorption but also improves the electrical conductivities of TiO2, thus enhancing the optical response and electron-hole separation. As a result, hierarchical micro/nano-structured TiO2 mesoporous spheres with oxygen vacancies exhibit a remarkably enhanced photoelectrochemical performance.
机译:通过无氧空位的分层微/纳米结构TiO2中孔球体通过无氢化策略制造,然后探讨了它们的光催化性能。 分层微/纳米结构的介孔球体可以作为高效光电化学器件的模型架构,因为它们可以同时提供丰富的催化活性位点,优异的光散射特性和用于电荷载体收集的高导电通路。 更重要的是,氧空位被引入TiO 2的表面并用作浅供体。 氧空位的存在不仅提高了光吸收,而且改善了TiO 2的电导率,从而提高了光学响应和电子孔分离。 结果,具有氧空位的分层微/纳米结构TiO2中孔球体具有显着增强的光电化学性能。

著录项

  • 来源
    《RSC Advances》 |2015年第13期|共7页
  • 作者

    Zhang Xiaoying; Chen Zhuoyuan;

  • 作者单位

    Chinese Acad Sci Inst Oceanol Key Lab Marine Environm Corros &

    Biofouling Qingdao 266071 Peoples R China;

    Chinese Acad Sci Inst Oceanol Key Lab Marine Environm Corros &

    Biofouling Qingdao 266071 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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