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Ultrathin bismuth oxyhalides solid solution nanosheets with oxygen vacancies for enhanced selective photocatalytic NO removal process

  • Xian Shi
  • Pingquan WangEmail author
  • Kai Zhang
  • Xing Li
Article
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Abstract

Photocatalytic NO removal is an oxidation reaction where the NO2 or NO3 can be generated during the selective or non-selective NO removal process. For enhanced photocatalytic NO removal ability, photocatalysts were required stronger molecular oxygen activation activity for stronger oxidizability. Solid solution structure is confirmed as an efficient strategy to achieve induced molecular oxygen activation capacity. In this work, ultrathin structural BiOBr0.5I0.5 with oxygen vacancies (BiOBr0.5I0.5-U) was prepared and it showed obvious enhanced photocatalytic efficiency for NO removal than unmodified BiOBr0.5I0.5. The photocatalytic NO removal mechanism was confirmed through efficient methods. The enhanced generation ability for superoxide and singlet oxygen due to the ultrathin structure of BiOBr0.5I0.5-U was confirmed evidentially. The improved molecular oxygen activation activity supported the improved selective NO removal efficiency. This study could provide a new thought for the design of efficient bismuth oxyhalide photocatalysts for NO removal.

Notes

Acknowledgements

This work was supported by National Natural Science Foundation of China (Nos. 51872147, 51502146, 51702270).

Supplementary material

10854_2019_2134_MOESM1_ESM.docx (1.6 mb)
Supplementary material 1 (DOCX 1611 kb) Supporting Information Other important experimental results, such as XPS survey, BET and so on, were shown in supporting information in detail

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengduChina

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