Alkali Niobate and Tantalate Perovskites as Alternative Photocatalysts
authors Zlotnik, S; Tobaldi, DM; Seabra, P; Labrincha, JA; Vilarinho, PM
nationality International
journal CHEMPHYSCHEM
author keywords methylene blue; niobium; perovskite phases; photocatalytic degradation; tantalum
keywords VISIBLE-LIGHT; NA; CHALLENGES; SURFACE; O-2; H-2; LI
abstract Alkali tantalates and niobates are listed as important photocatalysts for the development of renewable energy technologies and environmental remediation. Herein, the photocatalytic degradation of methylene blue dye in aqueous solution by using highly crystalline particles with perovskite-like structures, LiTaO3, LiNbO3, NaTaO3, NaNbO3, KNbO3, and KTaO3, is investigated. It is demonstrated that ferroelectric KNbO3 is the most efficient photocatalyst of those tested because it combines an electronic band structure that can respond successfully to UVA light with a relatively high surface energy that enhances the catalytic properties. Additionally, the built-in electric field due to internal polarization of ferroelectric particles may contribute to the unique properties of this functional photocatalyst. This work provides an ideal platform for the rational design of more efficient ferroelectric-based photocatalytic devices.
publisher WILEY-V C H VERLAG GMBH
issn 1439-4235
year published 2016
volume 17
issue 21
beginning page 3570
ending page 3575
digital object identifier (doi) 10.1002/cphc.201600476
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Physics
unique article identifier WOS:000388629200030
  ciceco authors
  impact metrics
times cited (wos core): 2
journal impact factor (jcr 2016): 3.075
5 year journal impact factor (jcr 2016): 2.997
category normalized journal impact factor percentile (jcr 2016): 70.837
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