Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 24, Pages 22920-22927Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am507641k
Keywords
bismuth oxyhalide; oxygen vacancy; visible light; photocatalytic
Funding
- Natural Science Foundations of China [21036009, 21273290, 91323101]
- Research Fund for the Doctoral Program of Higher Education of China [20120171110043]
- Integration of Production and Research Projects of the Ministry and Guangdong Province [2012B091100084]
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With the increasingly serious environmental problems, photocatalysis has recently attracted a great deal of attention, with particular focus on water and air purification and disinfection. Herein, we show an electroreduction strategy to improve significantly the solar absorption and donor density of BiOI nanosheet photocatalyst by introducing oxygen vacancies. These oxygen-deficient BiOI nanosheets exhibit an unexpected red shift of about 100 nm in light absorption band and 1 order of magnitude improvement in donor density compared to the untreated BiOI nanosheets and show 10 times higher photocatalytic activity than the untreated BiOI nanosheets for methyl orange (MO) degradation under visible light irradiation. Moreover, the as-prepared oxygen-deficient BiOI nanosheets also have excellent cycling stability and superior photocatalytic performance toward other dye pollutants.
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