Novel P-n Li2SnO3/g-C3N4 Heterojunction With Enhanced Visible Light Photocatalytic Efficiency Toward Rhodamine B Degradation
The design of highly efficient and stable photocatalysts to utilize solar energy is a significant challenge in photocatalysis. In this work, a series of novel p-n heterojunction photocatalysts, Li2SnO3/g-C3N4, was successfully prepared via a facile calcining method, and exhibited superior photocatal...
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Frontiers Media S.A.
2020-02-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2020.00075/full |
| _version_ | 1818061612884426752 |
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| author | Yuanyuan Li Meijun Wu Yaoqiong Wang Qimei Yang Xiaoyan Li Bin Zhang Dingfeng Yang |
| author_facet | Yuanyuan Li Meijun Wu Yaoqiong Wang Qimei Yang Xiaoyan Li Bin Zhang Dingfeng Yang |
| author_sort | Yuanyuan Li |
| collection | DOAJ |
| description | The design of highly efficient and stable photocatalysts to utilize solar energy is a significant challenge in photocatalysis. In this work, a series of novel p-n heterojunction photocatalysts, Li2SnO3/g-C3N4, was successfully prepared via a facile calcining method, and exhibited superior photocatalytic activity toward the photodegradation of Rhodamine B solution under visible light irradiation as compared with pure Li2SnO3 and g-C3N4. The maximum kinetic rate constant of photocatalytic degradation of Rhodamine B within 60 min was 0.0302 min−1, and the composites still retained excellent performance after four successive recycles. Chemical reactive species trapping experiments and electron paramagnetic resonance demonstrated that hydroxyl radicals (·OH) and superoxide ions (·O2-) were the dominant active species in the photocatalytic oxidation of Rhodamine B solution, while holes (h+) only played a minor role. We demonstrated that the enhancement of the photocatalytic activity could be assigned to the formation of a p-n junction photocatalytic system, which benefitted the efficient separation of photogenerated carriers. This study provides a visible light-responsive heterojunction photocatalyst with potential applications in environmental remediation. |
| first_indexed | 2024-12-10T13:51:05Z |
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| id | doaj.art-a126989bba684ed3ba5f9a14cdcd4f19 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-10T13:51:05Z |
| publishDate | 2020-02-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Chemistry |
| spelling | doaj.art-a126989bba684ed3ba5f9a14cdcd4f192022-12-22T01:46:10ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-02-01810.3389/fchem.2020.00075514461Novel P-n Li2SnO3/g-C3N4 Heterojunction With Enhanced Visible Light Photocatalytic Efficiency Toward Rhodamine B DegradationYuanyuan LiMeijun Wu0Yaoqiong Wang1Qimei Yang2Xiaoyan Li3Bin Zhang4Dingfeng Yang5Department of Biological and Chemical Engineering, Cooperative Innovation Center of Lipid Resources and Children's Daily Chemicals, Chongqing University of Education, Chongqing, ChinaCollege of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, ChinaDepartment of Biological and Chemical Engineering, Cooperative Innovation Center of Lipid Resources and Children's Daily Chemicals, Chongqing University of Education, Chongqing, ChinaNational ad Local Joint Laboratory of Traffic Civil Engineering Materials, Department of Materials and Engineering, Chongqing Jiaotong University, Chongqing, ChinaAnalytical and Testing Center of Chongqing University, Chongqing, ChinaCollege of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, ChinaThe design of highly efficient and stable photocatalysts to utilize solar energy is a significant challenge in photocatalysis. In this work, a series of novel p-n heterojunction photocatalysts, Li2SnO3/g-C3N4, was successfully prepared via a facile calcining method, and exhibited superior photocatalytic activity toward the photodegradation of Rhodamine B solution under visible light irradiation as compared with pure Li2SnO3 and g-C3N4. The maximum kinetic rate constant of photocatalytic degradation of Rhodamine B within 60 min was 0.0302 min−1, and the composites still retained excellent performance after four successive recycles. Chemical reactive species trapping experiments and electron paramagnetic resonance demonstrated that hydroxyl radicals (·OH) and superoxide ions (·O2-) were the dominant active species in the photocatalytic oxidation of Rhodamine B solution, while holes (h+) only played a minor role. We demonstrated that the enhancement of the photocatalytic activity could be assigned to the formation of a p-n junction photocatalytic system, which benefitted the efficient separation of photogenerated carriers. This study provides a visible light-responsive heterojunction photocatalyst with potential applications in environmental remediation.https://www.frontiersin.org/article/10.3389/fchem.2020.00075/fullLi2SnO3g-C3N4p-n heterojunctionphotocatalysisRhodamine BPhotoelectrochemistry |
| spellingShingle | Yuanyuan Li Meijun Wu Yaoqiong Wang Qimei Yang Xiaoyan Li Bin Zhang Dingfeng Yang Novel P-n Li2SnO3/g-C3N4 Heterojunction With Enhanced Visible Light Photocatalytic Efficiency Toward Rhodamine B Degradation Frontiers in Chemistry Li2SnO3 g-C3N4 p-n heterojunction photocatalysis Rhodamine B Photoelectrochemistry |
| title | Novel P-n Li2SnO3/g-C3N4 Heterojunction With Enhanced Visible Light Photocatalytic Efficiency Toward Rhodamine B Degradation |
| title_full | Novel P-n Li2SnO3/g-C3N4 Heterojunction With Enhanced Visible Light Photocatalytic Efficiency Toward Rhodamine B Degradation |
| title_fullStr | Novel P-n Li2SnO3/g-C3N4 Heterojunction With Enhanced Visible Light Photocatalytic Efficiency Toward Rhodamine B Degradation |
| title_full_unstemmed | Novel P-n Li2SnO3/g-C3N4 Heterojunction With Enhanced Visible Light Photocatalytic Efficiency Toward Rhodamine B Degradation |
| title_short | Novel P-n Li2SnO3/g-C3N4 Heterojunction With Enhanced Visible Light Photocatalytic Efficiency Toward Rhodamine B Degradation |
| title_sort | novel p n li2sno3 g c3n4 heterojunction with enhanced visible light photocatalytic efficiency toward rhodamine b degradation |
| topic | Li2SnO3 g-C3N4 p-n heterojunction photocatalysis Rhodamine B Photoelectrochemistry |
| url | https://www.frontiersin.org/article/10.3389/fchem.2020.00075/full |
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