A strategy to construct (reduced graphene oxide, γ-Fe2O3)/C3N4 step-scheme photocatalyst for visible-light water splitting
The interface architecture plays important role in the charge transfer and separation of S-scheme photocatalysis. Herein, we propose a strategy to synthesize (reduced graphene oxide, γ-Fe2O3)/C3N4 S-scheme heterojunctions by thermal treatment of MIL-101(Fe) and melamine. (rGO, γ-Fe2O3)/C3N4 presents...
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| Published in | Catalysis communications Vol. 157; p. 106327 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.09.2021
Elsevier |
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| Abstract | The interface architecture plays important role in the charge transfer and separation of S-scheme photocatalysis. Herein, we propose a strategy to synthesize (reduced graphene oxide, γ-Fe2O3)/C3N4 S-scheme heterojunctions by thermal treatment of MIL-101(Fe) and melamine. (rGO, γ-Fe2O3)/C3N4 presents a high oxygen evolution rate (OER) of 3.85 mmol·g−1·h−1 under visible irradiation, and overall water splitting activity with the hydrogen evolution (HER) and OER rates of 23.3 and 12 μmol·g−1·h−1, respectively. The band alignments by different Fermi levels of C3N4 and (rGO, γ-Fe2O3) result in internal electric field, which significantly enhances the separation efficiency of photogenerated electrons and holes.
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•The (rGO, γ-Fe2O3)/C3N4 S-scheme junctions are synthetized by thermal treatment.•(rGO, γ-Fe2O3)/C3N4 presents O2 evolution rate of 3.85 mmol·g−1·h−1.•(rGO, γ-Fe2O3)/C3N4 is active for overall water splitting. |
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| AbstractList | The interface architecture plays important role in the charge transfer and separation of S-scheme photocatalysis. Herein, we propose a strategy to synthesize (reduced graphene oxide, γ-Fe2O3)/C3N4 S-scheme heterojunctions by thermal treatment of MIL-101(Fe) and melamine. (rGO, γ-Fe2O3)/C3N4 presents a high oxygen evolution rate (OER) of 3.85 mmol·g−1·h−1 under visible irradiation, and overall water splitting activity with the hydrogen evolution (HER) and OER rates of 23.3 and 12 μmol·g−1·h−1, respectively. The band alignments by different Fermi levels of C3N4 and (rGO, γ-Fe2O3) result in internal electric field, which significantly enhances the separation efficiency of photogenerated electrons and holes. The interface architecture plays important role in the charge transfer and separation of S-scheme photocatalysis. Herein, we propose a strategy to synthesize (reduced graphene oxide, γ-Fe2O3)/C3N4 S-scheme heterojunctions by thermal treatment of MIL-101(Fe) and melamine. (rGO, γ-Fe2O3)/C3N4 presents a high oxygen evolution rate (OER) of 3.85 mmol·g−1·h−1 under visible irradiation, and overall water splitting activity with the hydrogen evolution (HER) and OER rates of 23.3 and 12 μmol·g−1·h−1, respectively. The band alignments by different Fermi levels of C3N4 and (rGO, γ-Fe2O3) result in internal electric field, which significantly enhances the separation efficiency of photogenerated electrons and holes. [Display omitted] •The (rGO, γ-Fe2O3)/C3N4 S-scheme junctions are synthetized by thermal treatment.•(rGO, γ-Fe2O3)/C3N4 presents O2 evolution rate of 3.85 mmol·g−1·h−1.•(rGO, γ-Fe2O3)/C3N4 is active for overall water splitting. |
| ArticleNumber | 106327 |
| Author | Liu, Yuxiang Si, Zhichun Xu, Xuejun Weng, Duan Li, Ang Wu, Xiaodong Ran, Rui |
| Author_xml | – sequence: 1 givenname: Yuxiang surname: Liu fullname: Liu, Yuxiang organization: The Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing City 100084, China – sequence: 2 givenname: Xuejun surname: Xu fullname: Xu, Xuejun organization: School of Materials Science and Hydrogen Energy, Foshan University, Foshan City 528225, China – sequence: 3 givenname: Ang surname: Li fullname: Li, Ang organization: International Graduate School at Shenzhen, Tsinghua University, Shenzhen City 518055, China – sequence: 4 givenname: Zhichun surname: Si fullname: Si, Zhichun email: si.zhichun@sz.tsinghua.edu.cn organization: International Graduate School at Shenzhen, Tsinghua University, Shenzhen City 518055, China – sequence: 5 givenname: Xiaodong surname: Wu fullname: Wu, Xiaodong organization: The Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing City 100084, China – sequence: 6 givenname: Rui surname: Ran fullname: Ran, Rui organization: The Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing City 100084, China – sequence: 7 givenname: Duan surname: Weng fullname: Weng, Duan email: duanweng@mail.tsinghua.edu.cn organization: The Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing City 100084, China |
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| Keywords | (rGO, γ-Fe2O3)/C3N4 Photocatalytic water splitting S-scheme heterojunction |
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| Title | A strategy to construct (reduced graphene oxide, γ-Fe2O3)/C3N4 step-scheme photocatalyst for visible-light water splitting |
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