Regulating Photocatalytic Selectivity of Anatase TiO2 with {101}, {001}, and {111} Facets. Issue 12 (18th August 2014)

• Record Type: Journal Article
• Authors: Zhang, Jun; Chen, Sheng; Qian, Lisha; Tao, Xi; Yang, Lingxia; Wang, Hongbo; Li, Yangyang; Zhang, Erpan; Xi, Junhua; Ji, Zhenguo; Rohrer, G.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 12(2014)
• Page Start: 4005
• Page End: 4010
• Publication Date: 2014-08-18
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13187
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace13187-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>In this work, we demonstrate a novel approach to control the photocatalytic selectivity of TiO<sub>2</sub> though different dominant crystal facets. {101}, {111}, and {001} facets exposed nanoscale anatase TiO<sub>2</sub> were obtained by a simple hydrothermal route with different ratio of NH<sub>4</sub><sup>+</sup> and F<sup>−</sup>, then a calcined progress to clear surface adsorbent atoms. Results reveal that {101} exposed TiO<sub>2</sub> has some remain binding N with a mode of unsaturated N<sub>3c</sub> exhibits selectively photocatalytic degradation of methylene orange (MO) in a methylene blue (MB) and methyl orange (MO) mixed solution, whereas TiO<sub>2</sub> with exposed {111} and {001} facets exhibits photocatalytic selectivity for MB. The {111} facets of anatase TiO<sub>2</sub> 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<sub>2c</sub> 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<sub>2c</sub> 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<sub>2</sub>.</p> </abstract>