One-Pot Hydrothermal Synthesis of MoS2/Zn0.5Cd0.5S Heterojunction for Enhanced Photocatalytic H2 Production
A series of molybdenum disulfide (MoS2)/Zn0.5Cd0.5S heterojunctions have been prepared via a mild one-pot hydrothermal method based on the optimization of composition content of primary photocatalyst. The photocatalysts demonstrated significantly improved visible light–driven photocatalytic activity...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2020-09-01
|
| Series: | Frontiers in Chemistry |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2020.00779/full |
| _version_ | 1819153654111797248 |
|---|---|
| author | Xinru Li Xinru Li Fei Xue Naixu Li Xukai Wei Hui Liu Jianchen Zhou Bin Lyu Bin Lyu Maochang Liu |
| author_facet | Xinru Li Xinru Li Fei Xue Naixu Li Xukai Wei Hui Liu Jianchen Zhou Bin Lyu Bin Lyu Maochang Liu |
| author_sort | Xinru Li |
| collection | DOAJ |
| description | A series of molybdenum disulfide (MoS2)/Zn0.5Cd0.5S heterojunctions have been prepared via a mild one-pot hydrothermal method based on the optimization of composition content of primary photocatalyst. The photocatalysts demonstrated significantly improved visible light–driven photocatalytic activity toward H2 evolution from water without using any noble metal cocatalyst. Among the as-prepared composites, 0.2% MoS2/Zn0.5Cd0.5S shows the best performance. The highest H2 evolution rate reaches 21 mmol · g−1 · h−1, which is four times higher than that of pure Zn0.5Cd0.5S. The apparent quantum efficiency is about 46.3% at 425 nm. The superiority is attributed to the tight connection between MoS2 and Zn0.5Cd0.5S by this facile one-step hydrothermal synthesis. As a result, the formation of the heterostructure introduces built-in electric field at the interface that facilitates vectorial charge transfer. More specifically, photogenerated electrons transfer to MoS2 to conduct proton reduction, where the holes are retained on the surface of Zn0.5Cd0.5S to react with the sacrificial reagents. Moreover, the composite presents improved stability without notable activity decay after several cycled tests. |
| first_indexed | 2024-12-22T15:08:37Z |
| format | Article |
| id | doaj.art-ed6d7196e7ee4e289aa7f52c2bd927a1 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-22T15:08:37Z |
| publishDate | 2020-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-ed6d7196e7ee4e289aa7f52c2bd927a12022-12-21T18:21:55ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-09-01810.3389/fchem.2020.00779566079One-Pot Hydrothermal Synthesis of MoS2/Zn0.5Cd0.5S Heterojunction for Enhanced Photocatalytic H2 ProductionXinru Li0Xinru Li1Fei Xue2Naixu Li3Xukai Wei4Hui Liu5Jianchen Zhou6Bin Lyu7Bin Lyu8Maochang Liu9School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi'an, ChinaCollege of Petroleum Engineering, Xi'an Shiyou University, Xi'an, ChinaInternational Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, ChinaSchool of Chemistry and Chemical Engineering, Southeast University, Nanjing, ChinaInternational Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, ChinaSchool of Material Science and Engineering, Shaanxi University of Science and Technology, Xi'an, ChinaSchool of Chemistry and Chemical Engineering, Southeast University, Nanjing, ChinaCollege of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, ChinaNational Educational Reform Experimental Demonstration Center, Xi'an, ChinaInternational Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, ChinaA series of molybdenum disulfide (MoS2)/Zn0.5Cd0.5S heterojunctions have been prepared via a mild one-pot hydrothermal method based on the optimization of composition content of primary photocatalyst. The photocatalysts demonstrated significantly improved visible light–driven photocatalytic activity toward H2 evolution from water without using any noble metal cocatalyst. Among the as-prepared composites, 0.2% MoS2/Zn0.5Cd0.5S shows the best performance. The highest H2 evolution rate reaches 21 mmol · g−1 · h−1, which is four times higher than that of pure Zn0.5Cd0.5S. The apparent quantum efficiency is about 46.3% at 425 nm. The superiority is attributed to the tight connection between MoS2 and Zn0.5Cd0.5S by this facile one-step hydrothermal synthesis. As a result, the formation of the heterostructure introduces built-in electric field at the interface that facilitates vectorial charge transfer. More specifically, photogenerated electrons transfer to MoS2 to conduct proton reduction, where the holes are retained on the surface of Zn0.5Cd0.5S to react with the sacrificial reagents. Moreover, the composite presents improved stability without notable activity decay after several cycled tests.https://www.frontiersin.org/article/10.3389/fchem.2020.00779/fullphotocatalysishydrogen productionsulfideheterojunctioncocatalyst |
| spellingShingle | Xinru Li Xinru Li Fei Xue Naixu Li Xukai Wei Hui Liu Jianchen Zhou Bin Lyu Bin Lyu Maochang Liu One-Pot Hydrothermal Synthesis of MoS2/Zn0.5Cd0.5S Heterojunction for Enhanced Photocatalytic H2 Production Frontiers in Chemistry photocatalysis hydrogen production sulfide heterojunction cocatalyst |
| title | One-Pot Hydrothermal Synthesis of MoS2/Zn0.5Cd0.5S Heterojunction for Enhanced Photocatalytic H2 Production |
| title_full | One-Pot Hydrothermal Synthesis of MoS2/Zn0.5Cd0.5S Heterojunction for Enhanced Photocatalytic H2 Production |
| title_fullStr | One-Pot Hydrothermal Synthesis of MoS2/Zn0.5Cd0.5S Heterojunction for Enhanced Photocatalytic H2 Production |
| title_full_unstemmed | One-Pot Hydrothermal Synthesis of MoS2/Zn0.5Cd0.5S Heterojunction for Enhanced Photocatalytic H2 Production |
| title_short | One-Pot Hydrothermal Synthesis of MoS2/Zn0.5Cd0.5S Heterojunction for Enhanced Photocatalytic H2 Production |
| title_sort | one pot hydrothermal synthesis of mos2 zn0 5cd0 5s heterojunction for enhanced photocatalytic h2 production |
| topic | photocatalysis hydrogen production sulfide heterojunction cocatalyst |
| url | https://www.frontiersin.org/article/10.3389/fchem.2020.00779/full |
| work_keys_str_mv | AT xinruli onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT xinruli onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT feixue onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT naixuli onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT xukaiwei onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT huiliu onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT jianchenzhou onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT binlyu onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT binlyu onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production AT maochangliu onepothydrothermalsynthesisofmos2zn05cd05sheterojunctionforenhancedphotocatalytich2production |