Enhanced photocatalytic activity and mechanism insight of copper-modulated lead-free Cs2AgSbCl6 double perovskite microcrystals
Summary: Lead halide perovskites are prospective candidates for CO2 photoconversion. Herein, we report copper-doped lead-free Cs2AgSbCl6 double perovskite microcrystals (MCs) for gas-solid phase photocatalytic CO2 reduction. The 0.2Cu@Cs2AgSbCl6 double perovskite MCs display unprecedented CO2 photor...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | iScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589004223014323 |
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| author | Daofu Wu Xiaoqing Liu Changqing Tian Jinchen Zhou Junan Lai Hongmei Ran Bo Gao Miao Zhou Qiang Huang Xiaosheng Tang |
| author_facet | Daofu Wu Xiaoqing Liu Changqing Tian Jinchen Zhou Junan Lai Hongmei Ran Bo Gao Miao Zhou Qiang Huang Xiaosheng Tang |
| author_sort | Daofu Wu |
| collection | DOAJ |
| description | Summary: Lead halide perovskites are prospective candidates for CO2 photoconversion. Herein, we report copper-doped lead-free Cs2AgSbCl6 double perovskite microcrystals (MCs) for gas-solid phase photocatalytic CO2 reduction. The 0.2Cu@Cs2AgSbCl6 double perovskite MCs display unprecedented CO2 photoreduction capability with CO and CH4 yields of 412 and 128 μmol g−1, respectively. The ultrafast transient absorption spectroscopy reveals the enhanced separation of photoexcited carriers in copper-doped Cs2AgSbCl6 MCs. The active sites and reaction intermediates on the surface of the doped Cs2AgSbCl6 are dynamically monitored and precisely unraveled based on the in-situ Fourier transform infrared spectroscopy investigation. In combination with density functional theory calculations, it is revealed that the copper-doped Cs2AgSbCl6 MCs facilitate sturdy CO2 adsorption and activation and strikingly enhance the photocatalytic performance. This work offers an in-depth interpretation of the photocatalytic mechanism of Cs2AgSbCl6 doped with copper, which may provide guidance for future design of high-performance photocatalysts for solar fuel production. |
| first_indexed | 2024-03-12T23:05:10Z |
| format | Article |
| id | doaj.art-e3444ed633cf4a7f83f8906fb68554ea |
| institution | Directory Open Access Journal |
| issn | 2589-0042 |
| language | English |
| last_indexed | 2024-03-12T23:05:10Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj.art-e3444ed633cf4a7f83f8906fb68554ea2023-07-19T04:23:54ZengElsevieriScience2589-00422023-08-01268107355Enhanced photocatalytic activity and mechanism insight of copper-modulated lead-free Cs2AgSbCl6 double perovskite microcrystalsDaofu Wu0Xiaoqing Liu1Changqing Tian2Jinchen Zhou3Junan Lai4Hongmei Ran5Bo Gao6Miao Zhou7Qiang Huang8Xiaosheng Tang9Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, ChinaKey Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaCollege of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaKey Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, ChinaSchool of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaKey Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; Corresponding authorCollege of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; Corresponding authorKey Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; Corresponding authorSummary: Lead halide perovskites are prospective candidates for CO2 photoconversion. Herein, we report copper-doped lead-free Cs2AgSbCl6 double perovskite microcrystals (MCs) for gas-solid phase photocatalytic CO2 reduction. The 0.2Cu@Cs2AgSbCl6 double perovskite MCs display unprecedented CO2 photoreduction capability with CO and CH4 yields of 412 and 128 μmol g−1, respectively. The ultrafast transient absorption spectroscopy reveals the enhanced separation of photoexcited carriers in copper-doped Cs2AgSbCl6 MCs. The active sites and reaction intermediates on the surface of the doped Cs2AgSbCl6 are dynamically monitored and precisely unraveled based on the in-situ Fourier transform infrared spectroscopy investigation. In combination with density functional theory calculations, it is revealed that the copper-doped Cs2AgSbCl6 MCs facilitate sturdy CO2 adsorption and activation and strikingly enhance the photocatalytic performance. This work offers an in-depth interpretation of the photocatalytic mechanism of Cs2AgSbCl6 doped with copper, which may provide guidance for future design of high-performance photocatalysts for solar fuel production.http://www.sciencedirect.com/science/article/pii/S2589004223014323Optical materialsMaterials propertyChemical property |
| spellingShingle | Daofu Wu Xiaoqing Liu Changqing Tian Jinchen Zhou Junan Lai Hongmei Ran Bo Gao Miao Zhou Qiang Huang Xiaosheng Tang Enhanced photocatalytic activity and mechanism insight of copper-modulated lead-free Cs2AgSbCl6 double perovskite microcrystals iScience Optical materials Materials property Chemical property |
| title | Enhanced photocatalytic activity and mechanism insight of copper-modulated lead-free Cs2AgSbCl6 double perovskite microcrystals |
| title_full | Enhanced photocatalytic activity and mechanism insight of copper-modulated lead-free Cs2AgSbCl6 double perovskite microcrystals |
| title_fullStr | Enhanced photocatalytic activity and mechanism insight of copper-modulated lead-free Cs2AgSbCl6 double perovskite microcrystals |
| title_full_unstemmed | Enhanced photocatalytic activity and mechanism insight of copper-modulated lead-free Cs2AgSbCl6 double perovskite microcrystals |
| title_short | Enhanced photocatalytic activity and mechanism insight of copper-modulated lead-free Cs2AgSbCl6 double perovskite microcrystals |
| title_sort | enhanced photocatalytic activity and mechanism insight of copper modulated lead free cs2agsbcl6 double perovskite microcrystals |
| topic | Optical materials Materials property Chemical property |
| url | http://www.sciencedirect.com/science/article/pii/S2589004223014323 |
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