Regulating Photocatalytic Selectivity of Anatase TiO^sub 2^ with {101}, {001}, and {111} Facets

In this work, we demonstrate a novel approach to control the photocatalytic selectivity of TiO... though different dominant crystal facets. ...101..., ...111..., and ...001... facets exposed nanoscale anatase TiO... were obtained by a simple hydrothermal route with different ratio of NH... and F-, then a calcined progress to clear surface adsorbent atoms. Results reveal that ...101... exposed TiO... has some remain binding N with a mode of unsaturated N... exhibits selectively photocatalytic degradation of methylene orange (MO) in a methylene blue (MB) and methyl orange (MO) mixed solution, whereas TiO... with exposed ...111... and ...001... facets exhibits photocatalytic selectivity for MB. The ...111... facets of anatase TiO... exhibit a better photocatalytic selective ability than ...001... facets. It confirms that the photocatalytic selectivity can be affected by different dominant crystal facets. In a deeper analysis, there are many unsaturated O... on the surface of ...001... and ...111... facets, which enhances adsorbent selectivity and relevant photocatalytic activity of MB, at the same time, the unsaturated O... on the surface of ...111... facets is much more than that on the surface of ...001... facets results in a better photocatalytic selectivity of ...111... facets. This research hopes that developing a new strategy for photocatalytic selectivity and providing a deeper understanding of different crystal facets of TiO... (ProQuest: ... denotes formulae/symbols omitted.)