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Porous BN/TiO2 hybrid nanosheets as highly efficient visible-light-driven photocatalysts
journal contribution
posted on 2017-01-01, 00:00 authored by Dan LiuDan Liu, Mingwen Zhang, Wanjie Xie, Lu Sun, Ying (Ian) ChenYing (Ian) Chen, Weiwei LeiWeiwei LeiPorous boron nitride (BN) nanosheets, which possess extreme large surface areas, high thermal conductivity and special chemical activities, have demonstrated advantages in water cleaning and energy storage. However, they are usually considered as an underachieving catalytic material for photocatalysis and other photovoltaic conversion applications due to their wide bad gap of 5.5 eV. Here, we report a novel porous BN/TiO2hybrid nanosheets with the formation of new B[sbnd]O[sbnd]Ti bondings between the boron dangling bonds at the open edges of pores of porous BN nanosheets and nanosized TiO2particles. Such highly active bondings make the hybrid nanosheets responsive to an extended wavelength range from UV to visible light (λ > 420 nm) spectrum and also substantially enhance the photocatalytic effect (up to 99%) for degradation of organic molecules. In addition, the porous BN/TiO2hybrid nanosheets exhibit excellent cycling stability up to 5 cycles maintaining high visible-light photocatalytic activity (97%). These results provide new insights for design of advanced hybrid photocatalysts with actively chemical bonding species, which can be applied in environmental protection, water splitting, and photo-electrochemical conversion.
History
Journal
Applied Catalysis B: EnvironmentalVolume
207Pagination
72 - 78Publisher DOI
ISSN
0926-3373Publication classification
C1 Refereed article in a scholarly journalCopyright notice
2017, ElsevierUsage metrics
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No categories selectedKeywords
Science & TechnologyPhysical SciencesTechnologyChemistry, PhysicalEngineering, EnvironmentalEngineering, ChemicalChemistryEngineeringPorous BN\/TiO2 hybrid nanosheetsVisible lightOrganic pollutants degradationExcellent recyclabilityBORON-NITRIDE NANOSHEETSHEAVY-METAL IONSTIO2IRRADIATIONPERFORMANCEGRAPHENECOMPOSITESCATALYSTSREMOVALFILMS
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