Hollow Gradient-Structured Iron-Anchored Carbon Nanospheres for Enhanced Electromagnetic Wave Absorption

Cao Wu; Jing Wang; Xiaohang Zhang; Lixing Kang; Xun Cao; Yongyi Zhang; Yutao Niu; Yingying Yu; Huili Fu; Zongjie Shen; Kunjie Wu; Zhenzhong Yong; Jingyun Zou; Bin Wang; Zhou Chen; Zhengpeng Yang; Qingwen Li

doi:10.1007/s40820-022-00963-w

Hollow Gradient-Structured Iron-Anchored Carbon Nanospheres for Enhanced Electromagnetic Wave Absorption

Nanomicro Lett. 2022 Dec 6;15(1):7. doi: 10.1007/s40820-022-00963-w.

Authors

Cao Wu^#¹, Jing Wang^#^{2

3}, Xiaohang Zhang², Lixing Kang^{4

5}, Xun Cao⁶, Yongyi Zhang^{4

7

5}, Yutao Niu^{1

3

8}, Yingying Yu^{1

9}, Huili Fu^{1

3

8}, Zongjie Shen¹, Kunjie Wu^{1

3}, Zhenzhong Yong^{1

3

8}, Jingyun Zou¹⁰, Bin Wang³, Zhou Chen¹¹, Zhengpeng Yang¹², Qingwen Li^{4

5}

Affiliations

¹ Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, Jiangsu, People's Republic of China.
² School of Science, Nanchang Institute of Technology, Nanchang, 330099, Jiangxi, People's Republic of China.
³ Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials, Jiangxi Institute of Nanotechnology, Nanchang, 330200, Jiangxi, People's Republic of China.
⁴ Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, Jiangsu, People's Republic of China. lxkang2013@sinano.ac.cn.
⁵ School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China. lxkang2013@sinano.ac.cn.
⁶ School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
⁷ Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials, Jiangxi Institute of Nanotechnology, Nanchang, 330200, Jiangxi, People's Republic of China. lxkang2013@sinano.ac.cn.
⁸ School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, Anhui, People's Republic of China.
⁹ College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, People's Republic of China.
¹⁰ Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, 215009, People's Republic of China.
¹¹ School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, 211800, People's Republic of China.
¹² Henan Key Laboratory of Materials On Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, People's Republic of China.

^# Contributed equally.

Abstract

Highlights:

Microwave absorber with nanoscale gradient structure was proposed for enhancing the electromagnetic absorption performance.
Outstanding reflection loss value (−62.7 dB), broadband wave absorption (6.4 dB with only 2.1 mm thickness) in combination with flexible adjustment abilities were acquired, which is superior to other relative graded distribution structures.
This strategy initiates a new method for designing and controlling wave absorber with excellent impedance matching property in practical applications.

Abstract: In the present paper, a microwave absorber with nanoscale gradient structure was proposed for enhancing the electromagnetic absorption performance. The inorganic–organic competitive coating strategy was employed, which can effectively adjust the thermodynamic and kinetic reactions of iron ions during the solvothermal process. As a result, Fe nanoparticles can be gradually decreased from the inner side to the surface across the hollow carbon shell. The results reveal that it offers an outstanding reflection loss value in combination with broadband wave absorption and flexible adjustment ability, which is superior to other relative graded distribution structures and satisfied with the requirements of lightweight equipment. In addition, this work elucidates the intrinsic microwave regulation mechanism of the multiscale hybrid electromagnetic wave absorber. The excellent impedance matching and moderate dielectric parameters are exhibited to be the dominative factors for the promotion of microwave absorption performance of the optimized materials. This strategy to prepare gradient-distributed microwave absorbing materials initiates a new way for designing and fabricating wave absorber with excellent impedance matching property in practical applications.

Supplementary Information: The online version contains supplementary material available at 10.1007/s40820-022-00963-w.

Keywords: Carbon nanospheres; Electromagnetic wave absorption; Gradient structures; Impedance matching.

Grants and funding

BB/F015976/1/BB_/Biotechnology and Biological Sciences Research Council/United Kingdom