F− surface modified ZnO for enhanced photocatalytic H2O2 production and its fs-TAS investigation
Pure ZnO exhibits low photocatalytic H2O2 production activity due to the rapid charge recombination. To realize the spatial separation of photogenerated electrons and holes, constructing an electron transfer channel on the ZnO surface is an effective approach. This study successfully modified the su...
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Elsevier
2025-05-01
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| Series: | Journal of Materiomics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847824002132 |
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| author | Xin Zhou Chenbin Ai Xiaojing Wang Zhen Wu Jianjun Zhang |
| author_facet | Xin Zhou Chenbin Ai Xiaojing Wang Zhen Wu Jianjun Zhang |
| author_sort | Xin Zhou |
| collection | DOAJ |
| description | Pure ZnO exhibits low photocatalytic H2O2 production activity due to the rapid charge recombination. To realize the spatial separation of photogenerated electrons and holes, constructing an electron transfer channel on the ZnO surface is an effective approach. This study successfully modified the surface of ZnO using F− (ZnO/F) by introducing NH4F in an aqueous phase photocatalytic system. The F− is adsorbed on the ZnO surface by Coulombic force and significantly improves the photocatalytic H2O2 production performance of ZnO, with the highest efficiency of 4137.2 μmol⋅g−1·L−1·h–1. The photocatalytic performance enhancement mechanism of ZnO/F is explained in terms of electron transfer dynamics by femtosecond transient absorption spectroscopy (fs-TAS) measurements. F− surface modification constructs a new ultrafast electron transport pathway from the ZnO CB to F−, and the optimal ZnO/F exhibits the fastest interfacial electron transfer lifetime of 5.8 ps. The F− surface modification effectively facilitates the charge separation, thereby increasing the number of electrons available for photocatalytic H2O2 reaction. This study has revealed the roles of F− surface modification in the photocatalytic H2O2 production by ZnO and provides guidance for ionic modification to improve photocatalytic performance. |
| format | Article |
| id | doaj-art-e9f85914f9334fb4b8fce1293e83029a |
| institution | OA Journals |
| issn | 2352-8478 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
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| series | Journal of Materiomics |
| spelling | doaj-art-e9f85914f9334fb4b8fce1293e83029a2025-08-20T02:03:07ZengElsevierJournal of Materiomics2352-84782025-05-0111310097410.1016/j.jmat.2024.100974F− surface modified ZnO for enhanced photocatalytic H2O2 production and its fs-TAS investigationXin Zhou0Chenbin Ai1Xiaojing Wang2Zhen Wu3Jianjun Zhang4College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China; Department of Chemical Engineering, Ordos Institute of Technology, Ordos, 017000, Inner Mongolia, China; Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430078, ChinaLaboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430078, ChinaCollege of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China; Corresponding author.Department of Chemical Engineering, Ordos Institute of Technology, Ordos, 017000, Inner Mongolia, ChinaLaboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430078, China; Corresponding author.Pure ZnO exhibits low photocatalytic H2O2 production activity due to the rapid charge recombination. To realize the spatial separation of photogenerated electrons and holes, constructing an electron transfer channel on the ZnO surface is an effective approach. This study successfully modified the surface of ZnO using F− (ZnO/F) by introducing NH4F in an aqueous phase photocatalytic system. The F− is adsorbed on the ZnO surface by Coulombic force and significantly improves the photocatalytic H2O2 production performance of ZnO, with the highest efficiency of 4137.2 μmol⋅g−1·L−1·h–1. The photocatalytic performance enhancement mechanism of ZnO/F is explained in terms of electron transfer dynamics by femtosecond transient absorption spectroscopy (fs-TAS) measurements. F− surface modification constructs a new ultrafast electron transport pathway from the ZnO CB to F−, and the optimal ZnO/F exhibits the fastest interfacial electron transfer lifetime of 5.8 ps. The F− surface modification effectively facilitates the charge separation, thereby increasing the number of electrons available for photocatalytic H2O2 reaction. This study has revealed the roles of F− surface modification in the photocatalytic H2O2 production by ZnO and provides guidance for ionic modification to improve photocatalytic performance.http://www.sciencedirect.com/science/article/pii/S2352847824002132Femtosecond transient absorption spectroscopyHydrogen peroxide productionElectron quenching dynamicsInterfacial electron transferElectron transfer mechanism |
| spellingShingle | Xin Zhou Chenbin Ai Xiaojing Wang Zhen Wu Jianjun Zhang F− surface modified ZnO for enhanced photocatalytic H2O2 production and its fs-TAS investigation Journal of Materiomics Femtosecond transient absorption spectroscopy Hydrogen peroxide production Electron quenching dynamics Interfacial electron transfer Electron transfer mechanism |
| title | F− surface modified ZnO for enhanced photocatalytic H2O2 production and its fs-TAS investigation |
| title_full | F− surface modified ZnO for enhanced photocatalytic H2O2 production and its fs-TAS investigation |
| title_fullStr | F− surface modified ZnO for enhanced photocatalytic H2O2 production and its fs-TAS investigation |
| title_full_unstemmed | F− surface modified ZnO for enhanced photocatalytic H2O2 production and its fs-TAS investigation |
| title_short | F− surface modified ZnO for enhanced photocatalytic H2O2 production and its fs-TAS investigation |
| title_sort | f surface modified zno for enhanced photocatalytic h2o2 production and its fs tas investigation |
| topic | Femtosecond transient absorption spectroscopy Hydrogen peroxide production Electron quenching dynamics Interfacial electron transfer Electron transfer mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2352847824002132 |
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