Superstructures with Atomic-Level Arranged Perovskite and Oxide Layers for Advanced Oxidation with an Enhanced Non-Free Radical Pathway

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dc.contributor.authorYang, L.
dc.contributor.authorJiao, Y.
dc.contributor.authorXu, X.
dc.contributor.authorPan, Y.
dc.contributor.authorSu, C.
dc.contributor.authorDuan, X.
dc.contributor.authorSun, H.
dc.contributor.authorLiu, S.
dc.contributor.authorWang, S.
dc.contributor.authorShao, Z.
dc.date.issued2022
dc.description.abstractPerovskite-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.
dc.description.statementofresponsibilityLi Yang, Yong Jiao, Xiaomin Xu, Yangli Pan, Chao Su, Xiaoguang Duan, Hongqi Sun, Shaomin Liu, Shaobin Wang, and Zongping Shao
dc.identifier.citationACS Sustainable Chemistry and Engineering, 2022; 10(5):1899-1909
dc.identifier.doi10.1021/acssuschemeng.1c07605
dc.identifier.issn2168-0485
dc.identifier.issn2168-0485
dc.identifier.orcidDuan, X. [0000-0001-9635-5807]
dc.identifier.orcidWang, S. [0000-0002-1751-9162]
dc.identifier.urihttps://hdl.handle.net/2440/134441
dc.language.isoen
dc.publisherAmerican Chemical Society Publications
dc.relation.granthttp://purl.org/au-research/grants/arc/DP200103332
dc.relation.granthttp://purl.org/au-research/grants/arc/DP200103315
dc.rights© 2022, American Chemical Society
dc.source.urihttps://doi.org/10.1021/acssuschemeng.1c07605
dc.subjectRuddlesden−Popper layered perovskite; non-free radical pathway; reactive oxygen species; interstitial oxygen; peroxymonosulfate
dc.titleSuperstructures with Atomic-Level Arranged Perovskite and Oxide Layers for Advanced Oxidation with an Enhanced Non-Free Radical Pathway
dc.typeJournal article
pubs.publication-statusPublished

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