Development of The Third-generation Active Photocatalysts: Crystalline Shape-controlled Metal Oxide Particles

从历史上看，半导体光催化剂的发展是基于成分和晶体结构的设计（第一代）和颗粒大小和比表面积的设计（第二代）。作为第三代高活性光催化剂的发展，本研究设计的晶体形态必须与影响光催化活性的晶格缺陷有关。本文通过氯化钛（IV）与氧的气相反应制备了暴露8个{101}面和2个{001}面的氧化钛（二氧化钛）颗粒，主要通过x射线衍射测量对其进行表征，并在几种反应体系中检测了其高光催化活性，以阐明颗粒形貌对光催化活性的影响。

Historically, semiconductor photocatalysts have been developed with the design of composition and crystalline structure (the first generation) and with that of particle size and specific surface area (the second generation). As the third-generation development of highly active photocatalysts, crystal morphology, which must be in relation with the crystal-lattice defects affecting the photocatalytic activity, is designed in this study. Here, titanium(IV) oxide (titania) particles exposing eight {101} facets and two {001} facets are prepared through gas-phase reaction of titanium(IV) chloride and oxygen, characterized mainly by X-ray diffraction measurement and examined their high photocatalytic activity in several reaction systems to clarify the effect of particle morphology on the photocatalytic activity.