Preparation and photocatalytic reduction performance of 2D SnO2/C3N4 composite photocatalyst

CUI Yanjuan; XU Hongyun; ZHU Yuxin; LI Xue; SONG Yanhua

doi:10.13801/j.cnki.fhclxb.20211028.004

Volume 39 Issue 8

Aug. 2022

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CUI Yanjuan, XU Hongyun, ZHU Yuxin, et al. Preparation and photocatalytic reduction performance of 2D SnO2/C3N4 composite photocatalyst[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 3852-3862. doi: 10.13801/j.cnki.fhclxb.20211028.004

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CUI Yanjuan, XU Hongyun, ZHU Yuxin, et al. Preparation and photocatalytic reduction performance of 2D SnO₂/C₃N₄ composite photocatalyst[J]. Acta Materiae Compositae Sinica, 2022, 39(8): 3852-3862. doi: 10.13801/j.cnki.fhclxb.20211028.004

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Preparation and photocatalytic reduction performance of 2D SnO₂/C₃N₄ composite photocatalyst

doi: 10.13801/j.cnki.fhclxb.20211028.004

School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China

Received Date: 2021-08-06
Accepted Date: 2021-10-13
Rev Recd Date: 2021-09-29

Available Online: 2021-10-28

Publish Date: 2022-08-31

Abstract

Abstract

Visible-light responsive two-dimensional composite semiconductor materials are significant in the field of photocatalysis. Construction of stable and effective heterojunctions to promote interface charge transport is the key in the research of two-dimensional composite materials. In this work, a face-to-face stacked 2D-2D SnO₂/C₃N₄ composite semiconductor was synthesized by calcining carbon nitride (C₃N₄) nanosheets and SnO₂ nanosheets. The main structure of C₃N₄ and SnO₂ well stably retained and a stable heterojunction at the interface of them was formed. Photocatalytic test results of water splitting for hydrogen (H₂) evolution and active oxygen (O₂) for hydrogen peroxide (H₂O₂) generation show that under visible light irradiation, the composite sample of SnO₂/C₃N₄-5% while the content of SnO₂ is 5wt% shows much enhanced H₂ evolution activity (54.9 µmol·h⁻¹), which is about 2.1 times as that of C₃N₄ nanoseets. And the H₂O₂ generation activity of SnO₂/C₃N₄-5% is 78.9 µmol·L⁻¹·h⁻¹, which is about 11.9 times that of C₃N₄ nanosheets. The structural characterization and electrochemical tests show that the establishment of heterojunction facilitate the rapid transfer of photogenerated electrons from C₃N₄ to SnO₂, inhi-bite the recombination rate of excited electrons-holes, and greatly improve the photocatalytic reduction perfor-mance.
- C₃N₄,
- SnO₂,
- heterojunction,
- water splitting for H₂ evolution,
- hydrogen peroxide
Long Abstrsct
Innovation Points

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References(34)

References

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