Formation of New Structures and Their Synergistic Effects in Boron and Nitrogen Codoped TiO2 for Enhancement of Photocatalytic Performance

作者：Mingyang Xing, Weikun Li, Yongmei Wu, Jinlong Zhang, Xue‐Qing Gong · 发表于：The Journal of Physical Chemistry C · 年份：2011 · DOI：10.1021/jp111103r · 被引用次数：66 · 研究领域：TiO2 Photocatalysis and Solar Cells、Advanced Photocatalysis Techniques、Catalytic Processes in Materials Science

A novel double hydrothermal method to prepare the boron and nitrogen codoped TiO 2 is developed. Two different ways have been used for the synthesis of the catalysts, one through the addition of boron followed by nitrogen, and the other through the addition of nitrogen first and then by boron. The X-ray photoelectron spectroscopy analysis indicates the synergistic effect of boron and nitrogen with the formation of Ti−B−N−Ti and Ti−N−B−O compounds on the surface of catalysts when nitrogen is introduced to the materials first. When the boron is added first, only Ti−N−B−O species occurs on the surface of catalysts. The above two compounds are all thought to enhance the photocatalytic activities of codoped TiO 2 . Density functional theory simulations are also performed to investigate the B−N synergistic effect. For the (101) surface, the formation of Ti−B−N−Ti structures gives rise to the localized states within the TiO 2 band gap.