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Highly efficient (BiO)2CO3-BiO2-x-graphene photocatalysts: Z-Scheme photocatalytic mechanism for their enhanced photocatalytic removal of NO
Abstract
Abstract NO removal is one of the most important issues in dealing with air pollution. In this report, Z-scheme (BiO)2CO3-BiO2-x-graphene (BOC-BiO2-x-GR) composite photocatalyst was designed for NO removal under simulated solar light irradiation. Characterizations of physical properties of the ternary composites revealed extended light absorption and high efficient electron-hole separation. Through the optimization of the BiO2-x content, we observed that the BOC-BiO2-x(35wt%)-GR composite exhibited superior photocatalytic activities in NO removal as compared to pure BOC, BiO2-x, and BOC-BiO2-x binary composites. Detailed microstructural observation showed that the BOC-BiO2-x heterojunction was formed between BOC (013) and BiO2-x (111) planes. The density of state (DOS) calculation revealed that due to the different hybridization conditions in the energy bands of BOC and BiO2-x, the Z-scheme charge transfer should be dominant at the heterojunction interface. The density functional theory (DFT) computation on the Fermi level results confirmed that energy band structure between BOC and BiO2-x is more in favor of the transfer of photo-generated electrons from CB of BOC to the VB of BiO2-x, which can be further enhanced by highly conductive GR sheets. The electron spin resonance (ESR) experiments results show that O2 − and HO were produced during the photocatalytic process, which further provided evidences that the BOC-BiO2-x(35wt%)-GR composite works as a Z-scheme photocatalyst. This work indicates that Bi-based nanomaterials can be employed as a stable and high efficient solar light active photocatalyst for NO removal in air pollution control.
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Photocatalytic degradation for environmental applications—A review
Bhatkhande, D. S., Pangarkar, V. G., & Beenackers, A. A. C. M. (2002) · Journal of Chemical Technology & Biotechnology · doi:10.1002/jctb.532 · Cited by 1,365
Tong, Z., Yang, D., Shi, J., Nan, Y., Sun, Y., & Jiang, Z. (2015) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.5b09503 · Cited by 431
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Graphene-based nano composites and their applications. A review
Lawal, A. T. (2019) · Biosensors and Bioelectronics · doi:10.1016/j.bios.2019.111384 · Cited by 344
Roles of N-Vacancies over Porous g-C3N4 Microtubes during Photocatalytic NOx Removal
Wang, Z., Huang, Y., Chen, M., Shi, X., Zhang, Y., Cao, J., Ho, W., & Lee, S. C. (2019) · ACS Applied Materials & Interfaces · doi:10.1021/acsami.8b21987 · Cited by 287
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Metadata
- Authors
- Jia, Y., Li, S., Gao, J., Zhu, G., Zhang, F., Shi, X., Huang, Y., & Liu, C.
- Venue
- Applied Catalysis B: Environmental
- Publisher
- Elsevier BV
- Published
- 2019-01
- Volume
- 240
- Pages
- 241-252
- ISSN
- 0926-3373 (ISSN-L)
- OpenAlex
- W2890201687
- Cited by
- 230
- References
- 2
- FWCI
- 6.39
- Type
- journal article
- Language
- en
- Open access
- closed
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- Jia, Y., Li, S., Gao, J., Zhu, G., Zhang, F., Shi, X., Huang, Y., & Liu, C. (2019). Highly efficient (BiO)2CO3-BiO2-x-graphene photocatalysts: Z-Scheme photocatalytic mechanism for their enhanced photocatalytic removal of NO. Applied Catalysis B: Environmental. https://doi.org/10.1016/j.apcatb.2018.09.005
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