Issue

Vol. 13 (2021)

Structural Engineering of Hierarchical Aerogels Comprised of Multi-dimensional Gradient Carbon Nanoarchitectures for Highly Efficient Microwave Absorption

https://doi.org/10.1007/s40820-021-00667-7
Yongpeng Zhao
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Xueqing Zuo
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Yuan Guo
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Hui Huang
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Hao Zhang
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Ting Wang
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Ningxuan Wen
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Huan Chen
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Tianze Cong
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Javid Muhammad
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Xuan Yang
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Xinnan Wang
School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Zeng Fan
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China
Lujun Pan
School of Physics, Dalian University of Technology, Dalian 116024, Liaoning, People’s Republic of China

Corresponding Author: Lujun Pan

lpan@dlut.edu.cn

Nano-Micro Letters, Vol. 13 (2021), Article Number: 144

Abstract

Recently, multilevel structural carbon aerogels are deemed as attractive candidates for microwave absorbing materials. Nevertheless, excessive stack and agglomeration for low-dimension carbon nanomaterials inducing impedance mismatch are significant challenges. Herein, the delicate “3D helix–2D sheet–1D fiber–0D dot” hierarchical aerogels have been successfully synthesized, for the first time, by sequential processes of hydrothermal self-assembly and in-situ chemical vapor deposition method. Particularly, the graphene sheets are uniformly intercalated by 3D helical carbon nanocoils, which give a feasible solution to the mentioned problem and endows the as-obtained aerogel with abundant porous structures and better dielectric properties. Moreover, by adjusting the content of 0D core–shell structured particles and the parameters for growth of the 1D carbon nanofibers, tunable electromagnetic properties and excellent impedance matching are achieved, which plays a vital role in the microwave absorption performance. As expected, the optimized aerogels harvest excellent performance, including broad effective bandwidth and strong reflection loss at low filling ratio and thin thickness. This work gives valuable guidance and inspiration for the design of hierarchical materials comprised of dimensional gradient structures, which holds great application potential for electromagnetic wave attenuation.


Highlights:


1 The delicate “3D helix–2D sheet–1D fiber–0D dot” hierarchical aerogels were successfully synthesized.
2 The graphene sheets are uniformly intercalated by helical carbon nanocoils, which endow the as-obtained aerogel with abundant porous structures and better dielectric properties.
3 By adjusting the growth parameters of 0D core-shell structured particles and 1D carbon nanofibers, the tunable electromagnetic properties and excellent impedance matching are achieved.

Keywords

Hierarchical aerogels Multi-dimensional gradient Carbon nanocoils Microwave absorption
Zhao, Yongpeng, Xueqing Zuo, Yuan Guo, Hui Huang, Hao Zhang, Ting Wang, Ningxuan Wen, Huan Chen, Tianze Cong, Javid Muhammad, Xuan Yang, Xinnan Wang, Zeng Fan, and Lujun Pan. 2021. “Structural Engineering of Hierarchical Aerogels Comprised of Multi-Dimensional Gradient Carbon Nanoarchitectures for Highly Efficient Microwave Absorption”. Nano-Micro Letters 13 (June):144. https://doi.org/10.1007/s40820-021-00667-7.
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