Abstract
Molecular oxygen activation is very important for photocatalytic degradation of organic pollutants. In this paper, Bi24O31Cl10 nanosheets with {100} facets exposure were successfully synthesized by hydromel method and characterized. The size of a single nanosheet is about 5μm in width and 10–30nm in thickness, which results in a large ratio of surface to thickness and higher exposure ratio of {100} 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 (O2•−) under visible light (λ>420nm) irradiation, and generate hydroxyl radical (•OH) under UV–vis light irradiation. This strategy in this work may potentially be extended to other bismuth-based photocatalysts for molecular oxygen activation.
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