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Facet-Dependent Catalytic Activity of Nanosheet-Assembled Bismuth Oxyiodide Microspheres in Degradation of Bisphenol A
Abstract
Photocatalysts with different exposed facets often exhibit different photochemical performances, but the underlying mechanisms are not fully understood. In this study, we synthesized two nanosheet-assembled bismuth oxyiodide (BiOI) microspheres with exposed (110) and (001) facets, respectively, to further investigate facet-dependent photocatalytic activity. Our experimental results showed that the BiOI microspheres with exposed (110) facets exhibited much greater catalytic activity than the BiOI microspheres with exposed (001) facets in the degradation of bisphenol A under visible light irradiation. Density functional theory calculation revealed that the (110) facets can adsorb a greater amount of O2 and, thus, form more O2(•-) and (•)OH radicals than the (001) facets. The electron spin resonance spectroscopy and radical scavenging experiments verified that the BiOI microspheres with exposed (110) facets could produce a greater amount of O2(•-) radicals than the BiOI microspheres with exposed (001) facets, and more importantly, between the two BiOI products, only the BiOI microspheres with exposed (110) facets could generate (•)OH radicals directly. The facet-dependent radical formation mechanisms were previously unidentified. The findings of this study may have important implications for the understanding of the facet-dependent photochemical performance of photocatalysts and the design of novel catalytic materials with inorganic nanostructures.
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Cites
The surface science of titanium dioxide
Diebold, U. (2003) · Surface Science Reports · doi:10.1016/s0167-5729(02)00100-0 · Cited by 7,944
Cited by
Mechanistic Insights into Photodegradation of Organic Dyes Using Heterostructure Photocatalysts
Chiu, Y.-H., Chang, T.-F., Chen, C.-Y., Sone, M., & Hsu, Y.-J. (2019) · Catalysts · doi:10.3390/catal9050430 · Cited by 818
Yang, Y., Zhang, C., Lai, C., Zeng, G., Huang, D., Cheng, M., Wang, J., Chen, F., Zhou, C., & Xiong, W. (2018) · Advances in Colloid and Interface Science · doi:10.1016/j.cis.2018.03.004 · Cited by 544
Facet‐Engineered Surface and Interface Design of Photocatalytic Materials
Bai, S., Wang, L., Li, Z., & Xiong, Y. (2017) · Advanced Science · doi:10.1002/advs.201600216 · Cited by 429
Identification of preferentially exposed crystal facets by X-ray diffraction
Zhang, L., Gonçalves, A. A. S., & Jaroniec, M. (2020) · RSC Advances · doi:10.1039/d0ra00769b · Cited by 94
Metadata
- Authors
- Pan, M., Zhang, H., Gao, G., Liu, L., & Chen, W.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-04-30
- Volume
- 49
- Issue
- 10
- Pages
- 6240-6248
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2331732642
- Cited by
- 202
- References
- 1
- FWCI
- 7.53
- Type
- journal article
- Language
- en
- Open access
- closed
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