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Regulating Photocatalytic Selectivity of Anatase TiO 2 with {101}, {001}, and {111} Facets
Author(s) -
Zhang Jun,
Chen Sheng,
Qian Lisha,
Tao Xi,
Yang Lingxia,
Wang Hongbo,
Li Yangyang,
Zhang Erpan,
Xi Junhua,
Ji Zhenguo
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13187
Subject(s) - photocatalysis , selectivity , anatase , methyl orange , adsorption , materials science , calcination , hydrothermal circulation , chemical engineering , photochemistry , nanotechnology , inorganic chemistry , chemistry , catalysis , organic chemistry , engineering
In this work, we demonstrate a novel approach to control the photocatalytic selectivity of TiO 2 though different dominant crystal facets. {101}, {111}, and {001} facets exposed nanoscale anatase TiO 2 were obtained by a simple hydrothermal route with different ratio of NH 4 + and F − , then a calcined progress to clear surface adsorbent atoms. Results reveal that {101} exposed TiO 2 has some remain binding N with a mode of unsaturated N 3c exhibits selectively photocatalytic degradation of methylene orange ( MO ) in a methylene blue ( MB ) and methyl orange ( MO ) mixed solution, whereas TiO 2 with exposed {111} and {001} facets exhibits photocatalytic selectivity for MB . The {111} facets of anatase TiO 2 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 2c 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 2c 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 2 .