Controllable preparation method and performance of three-dimensional reduced graphene oxide aerogel under mild conditions

ZHAO Huhu; ZHOU Yujing; HU Xiaolan; ZHU Xiangdong; REN Mingwei

doi:10.13801/j.cnki.fhclxb.20220424.005

Volume 40 Issue 3

Mar. 2023

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ZHAO Huhu, ZHOU Yujing, HU Xiaolan, et al. Controllable preparation method and performance of three-dimensional reduced graphene oxide aerogel under mild conditions[J]. Acta Materiae Compositae Sinica, 2023, 40(3): 1512-1521. doi: 10.13801/j.cnki.fhclxb.20220424.005

Citation:

ZHAO Huhu, ZHOU Yujing, HU Xiaolan, et al. Controllable preparation method and performance of three-dimensional reduced graphene oxide aerogel under mild conditions[J]. Acta Materiae Compositae Sinica, 2023, 40(3): 1512-1521. doi: 10.13801/j.cnki.fhclxb.20220424.005

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Controllable preparation method and performance of three-dimensional reduced graphene oxide aerogel under mild conditions

doi: 10.13801/j.cnki.fhclxb.20220424.005

ZHAO Huhu^{1, 2
,},
ZHOU Yujing^{1, 2
,
,},
HU Xiaolan^{3
,
,},
ZHU Xiangdong^{1, 2},
REN Mingwei^{1, 2}

1.
State Key Laboratory of Advanced Forming Technology and Equipment, China Academy of Machinery Science and Technology Group, Beijing 100083, China
2.
Dezhou Branch of Beijing National Innovation Institute of Ligheweight CO., LTD., Dezhou 253049, China
3.
College of Materials, Xiamen University, Xiamen 361005, China

Funds: Open Fund of the State Key Laboratory of Advanced Forming Technology and Equipment (SKL2020002); Natural Science Foundation of Shandong Province (ZR2020ME068); Key Research and Development Plan of Hainan Province (ZDYF2020011)

Received Date: 2022-03-07
Accepted Date: 2022-04-19
Rev Recd Date: 2022-04-07

Available Online: 2022-04-26

Publish Date: 2023-03-15

Abstract

Abstract

In order to realize the large-area controllable preparation and high performance of graphene-based three-dimensional aerogels under mild environmental conditions, hydrazine hydrate is used as reducing agent in this paper. Through low-temperature pre-frozen combined with natural drying at room temperature, large-area three-dimensional reduced graphene oxide (3D-RGO) aerogels with a diameter of 30 cm can be prepared effectively and controlled. The method has mild preparation conditions and does not need any heating conditions or special freeze-drying equipment. By controlling the reduction time, pre-frozen time, pre-frozen temperature and reaction vessel during the preparation of 3D-RGO aerogel, the shape, surface wettability, volume shrinkage aerogel can be effectively adjusted to achieve controllable preparation of 3D-RGO aerogel. The 3D-RGO aerogel has no obvious volume shrinkage and structural cracks. The aerogels exhibit a stable honeycomb-like structure with a stable pore size of about 500 μm and a low density of 3.8 mg/cm³, and it can quickly undergo a compression strain of 90% and return to the initial state. The volume shrinkage rate of the aerogels is <5% in the drying process. At the same time, the graphene aerogel exhibits good and stable conductivity. When the compressive strain increases from 0% to 90%, its conductivity increases from 17.3 S/m to 115.2 S/m. This method is suitable for the cost-effective preparation of large-area graphene aerogels.
- reduced graphene oxide,
- aerogel,
- mild conditions,
- controllable preparation,
- compression properties,
- conductivity properties
Long Abstrsct
Innovation Points

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References(39)

References

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