Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 165, Issue -, Pages 668-675Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2014.10.075
Keywords
Bi24O31CI10; Molecular oxygen activation; Photocatalysis; Bismuth-rich strategy
Funding
- Henan Joint Funds of the National Natural Science Foundation of China [U1404506]
- Natural Science Foundation of Henan Department of Science Technology [142102210477]
- Natural Science Foundation of Henan Department of Education [14A150021]
- Natural Science Foundation of Nanyang Normal University [ZX2014039]
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Molecular oxygen activation is very important for photocatalytic degradation of organic pollutants. In this paper, Bi24O31Cl10 nanosheets with {1 0 0} facets exposure were successfully synthesized by hydromel method and characterized. The size of a single nanosheet is about 5 pm in width and 10-30 nm in thickness, which results in a large ratio of surface to thickness and higher exposure ratio of {1 0 0} facets. The Mott-Schottky test revealed that the conduction band minimum (CBM) of Bi24O31Cl10 is more negative than BiOCl due to the bismuth-rich strategy. And the photocatalytic results showed that as-synthesized Bi24O31Cl10 showed higher photocatalytic properties than BiOCl for activate molecular oxygen to generate superoxide radical (O-2 center dot(-)) under visible light (lambda >420 nm) irradiation, and generate hydroxyl radical (center dot OH) under UV-vis light irradiation. This strategy in this work may potentially be extended to other bismuth-based photocatalysts for molecular oxygen activation. (C) 2014 Elsevier B.V. All rights reserved.
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