The Controllable Synthesis of Defect Graphene and Its Humidity-sensing Property at Room Temperature

HUANG Qingwu; ZHOU Peng; ZENG Dawen; SONG Wulin

doi:10.6054/j.jscnun.2021088

Journal of South China Normal University (Natural Science Edition) > 2021 > 53(6): 23-27. > DOI: 10.6054/j.jscnun.2021088

HUANG Qingwu, ZHOU Peng, ZENG Dawen, SONG Wulin. The Controllable Synthesis of Defect Graphene and Its Humidity-sensing Property at Room Temperature[J]. Journal of South China Normal University (Natural Science Edition), 2021, 53(6): 23-27. DOI: 10.6054/j.jscnun.2021088

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The Controllable Synthesis of Defect Graphene and Its Humidity-sensing Property at Room Temperature

1.
The Analytical and Testing Center, Huazhong University of Science and Techmology, Wuhan 430074, China
2.
School of Material Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

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Received Date: May 18, 2021
Available Online: January 09, 2022

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Abstract

Abstract

Controllable preparation of defect graphene was successfully realized by reducing cheap sugars with active metal sodium. The graphene material showed excellent humidity sensitivity at room temperature. The characte-rization results showed that the addition of sugars increased the thickness of graphene to 0.4 nm and changed the surface modification groups of the defective graphene and their content(mole ratio). The mole ratio of oxygen-containing groups on the surface of defect graphene prepared with the sucrose precursor is up to 24.2%. The humidity sensitivity of graphene samples with different defect contents at room temperature varies. Compared with the samples without sugar, the room-temperature humidity sensitivity of the defective graphene prepared with the sucrose precursor can be improved by 4.5 times. This study can provide technical reference for the application of graphene-based materials to room-temperature gas sensing.

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References (20)

References

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