Superstructures with Atomic-Level Arranged Perovskite and Oxide Layers for Advanced Oxidation with an Enhanced Non-Free Radical Pathway
Article
Article Title | Superstructures with Atomic-Level Arranged Perovskite and Oxide Layers for Advanced Oxidation with an Enhanced Non-Free Radical Pathway |
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ERA Journal ID | 200101 |
Article Category | Article |
Authors | Yang, Li, Jiao, Yong, Xu, Xiaomin, Pan, Yangli, Su, Chao, Duan, Xiaoguang, Sun, Hongqi, Liu, Shaomin, Wang, Shaobin and Shao, Zongping |
Journal Title | ACS Sustainable Chemistry and Engineering |
Journal Citation | 10 (5), pp. 1899-1909 |
Number of Pages | 11 |
Year | 2022 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 2168-0485 |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acssuschemeng.1c07605 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acssuschemeng.1c07605 |
Abstract | Perovskite-based oxides demonstrate a great catalytic efficiency in advanced oxidation processes (AOPs), where both free and non-free radical pathways may occur. The non-free radical pathway is preferable because it is less affected by the wastewater environment, yet little is known about its origin. Here, we exploit Ruddlesden–Popper (RP) layered perovskite oxides as an excellent platform for investigating the structure–property relationship for peroxymonosulfate (PMS) activation in AOPs. The atomic-level interaction of the perovskite and rock salt layers in RP oxides stabilizes the transition metals at low valences, causing the formation of abundant lattice oxygen/interstitial oxygen species. Unlike oxygen vacancies in conventional perovskites, which promote free-radical generation, these reactive oxygen species in RP perovskites have high activity and mobility and facilitate the formation of non-free radical singlet oxygen. This singlet oxygen reaction pathway is optimized by tailoring the oxygen species, leading to the discovery of LaSrCo0.8Fe0.2O4 with exceptionally efficient PMS activation. |
Keywords | interstitial oxygen; Ruddlesden−Popper layered perovskite; non-free radical pathway; reactive oxygen species; peroxymonosulfate |
ANZSRC Field of Research 2020 | 4004. Chemical engineering |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Nanjing Tech University, China |
Curtin University | |
Centre for Future Materials | |
Jiangsu University of Science and Technology, China | |
University of Adelaide | |
Edith Cowan University | |
Curtin University of Technology |
https://research.usq.edu.au/item/z02z3/superstructures-with-atomic-level-arranged-perovskite-and-oxide-layers-for-advanced-oxidation-with-an-enhanced-non-free-radical-pathway
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