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Nano Research 2023, 16(5): 6568-6576 https://doi.org/10.1007/s12274-022-5352-6
Research Article | Issue | Published: 05 March 2023

Face-to-face heterojunctions within 2D/2D porous NiCo oxyphosphide/g-C3N4 towards efficient and stable photocatalytic H2 evolution

Show Author's Information Genrui Zhang1,2,  Xiaojing Li1,2,  Na Li1,2,  Tingting Wu1,2( ),  Lei Wang1,3,4( )
Key Laboratory of Eco-chemical Engineering, Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life Science, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, Qingdao University of Science and Technology, Qingdao 266042, China
College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Keywords:
photocatalyst, hydrogen evolution, 2D/2D heterojunction, graphitic carbon nitride (g-C3N4) nanosheets, 2D porous NiCo oxyphosphide (NiCoOP)
Topics:
Photocatalysis
Cite this article:
Zhang G, Li X, Li N, et al. Face-to-face heterojunctions within 2D/2D porous NiCo oxyphosphide/g-C3N4 towards efficient and stable photocatalytic H2 evolution. Nano Research, 2023, 16(5): 6568-6576. https://doi.org/10.1007/s12274-022-5352-6
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Abstract Full text Electronic supplementary material About this article

Constructing 2D/2D face-to-face heterojunctions is believed to be an effective strategy to enhance photocatalytic performance due to the enlarged contact interface and increased surface active sites. Herein, 2D porous NiCo oxyphosphide (NiCoOP) was synthesized for the first time and coupled with graphitic carbon nitride (g-C3N4) nanosheets to form 2D/2D heterojunctions via an in-situ phosphating method. The optimal 4 wt.% 2D/2D NiCoOP/g-C3N4 (OPCN) photocatalyst achieves a hydrogen evolution rate of 1.4 mmol·h−1·g−1, which is 33 times higher than that of pure g-C3N4. The greatly improved photocatalytic performance of the composite photocatalysts could be attributed to the formation of interfacial surface bonding states and sufficient charge transfer channels for accelerating carrier separation and transfer and the porous structure of NiCoOP nanosheets with abundant surface active sites for promoting surface reactions. Amazingly, the 2D/2D OPCN composite photocatalysts also exhibit superior stability during photocatalytic reactions. This study not only designs new noble-metal-free NiCoOP/g-C3N4 composite photocatalysts but also provides a new sight in fabricating face-to-face 2D/2D heterojunctions for their application in energy conversion areas.


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Abstract
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Electronic supplementary material
About this article

Face-to-face heterojunctions within 2D/2D porous NiCo oxyphosphide/g-C3N4 towards efficient and stable photocatalytic H2 evolution

Show Author's information Genrui Zhang1,2, Xiaojing Li1,2, Na Li1,2, Tingting Wu1,2( ), Lei Wang1,3,4( )
Key Laboratory of Eco-chemical Engineering, Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life Science, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, Qingdao University of Science and Technology, Qingdao 266042, China
College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Abstract

Constructing 2D/2D face-to-face heterojunctions is believed to be an effective strategy to enhance photocatalytic performance due to the enlarged contact interface and increased surface active sites. Herein, 2D porous NiCo oxyphosphide (NiCoOP) was synthesized for the first time and coupled with graphitic carbon nitride (g-C3N4) nanosheets to form 2D/2D heterojunctions via an in-situ phosphating method. The optimal 4 wt.% 2D/2D NiCoOP/g-C3N4 (OPCN) photocatalyst achieves a hydrogen evolution rate of 1.4 mmol·h−1·g−1, which is 33 times higher than that of pure g-C3N4. The greatly improved photocatalytic performance of the composite photocatalysts could be attributed to the formation of interfacial surface bonding states and sufficient charge transfer channels for accelerating carrier separation and transfer and the porous structure of NiCoOP nanosheets with abundant surface active sites for promoting surface reactions. Amazingly, the 2D/2D OPCN composite photocatalysts also exhibit superior stability during photocatalytic reactions. This study not only designs new noble-metal-free NiCoOP/g-C3N4 composite photocatalysts but also provides a new sight in fabricating face-to-face 2D/2D heterojunctions for their application in energy conversion areas.

Keywords: photocatalyst, hydrogen evolution, 2D/2D heterojunction, graphitic carbon nitride (g-C3N4) nanosheets, 2D porous NiCo oxyphosphide (NiCoOP)

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Publication history
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Acknowledgements

Publication history

Received: 05 October 2022
Revised: 15 November 2022
Accepted: 23 November 2022
Published: 05 March 2023
Issue date: May 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work is financially supported by the National Natural Science Foundation of China (Nos. 52072197 and 52102272), Taishan Scholar Young Talent Program (No. tsqn201909114), the Natural Science Foundation of Shandong Province (No. ZR2021QE063), Youth Innovation and Technology Foundation of Shandong Higher Education Institutions, China (No. 2019KJC004), Major Scientific and Technological Innovation Project (No. 2019JZZY020405), Outstanding Youth Foundation of Shandong Province, China (No. ZR2019JQ14), Major Basic Research Program of the Natural Science Foundation of Shandong Province (No. ZR2020ZD09) and Talent Foundation funded by Province and Ministry Co-construction Collaborative Innovation Center of Eco-chemical Engineering (No. STHGYX2213).

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