Citation: Zhongning Tian, Jinyuan Liu, Meng Zhang, Qianqian Jia, Mingbo Liu, Zhenjiang Li, Ting Wang, Wenjie Zhao, Dongwei Ma, Xueli Qi. Constructing selenium-vacancy-rich SiC@CoSe_2-x nanocomposites to boost dipole and interfacial polarization for electromagnetic wave absorption[J]. Acta Physico-Chimica Sinica, ;2026, 42(8): 100323. doi: 10.1016/j.actphy.2026.100323 shu

Constructing selenium-vacancy-rich SiC@CoSe_2-x nanocomposites to boost dipole and interfacial polarization for electromagnetic wave absorption

Zhongning Tian ¹ ,
Jinyuan Liu ¹ ,
Meng Zhang ^1,, ,
Qianqian Jia ¹ ,
Mingbo Liu ¹ ,
Zhenjiang Li ^1,, ,
Ting Wang ² ,
Wenjie Zhao ³ ,
Dongwei Ma ⁴ ,
Xueli Qi ^5,,

1.
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong Province, China;
2.
College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong Province, China;
3.
Sino-German College of Technology, Qingdao University of Science and Technology, Qingdao 266061, Shandong Province, China;
4.
School of Automotive Materials, Hubei University of Automotive Technology, Shiyan 442002, Hubei Province, China;
5.
Shandong Industrial Ceramic Research & Design institute Co., Ltd., Zibo 255000, Shandong Province, China

Corresponding author: Meng Zhang, Zhenjiang Li, Xueli Qi,
Received Date: 21 March 2026
Revised Date: 8 May 2026
Accepted Date: 11 May 2026

Material hybridization and defect engineering are two effective strategies for tailoring electromagnetic wave absorption performance. In this work, to address the imbalanced impedance matching and weak absorption capability arising from the silicon carbide (SiC) nanowires, cobalt oxide (Co₃O₄) nanoparticles were successfully anchored onto the SiC nanowire surfaces via hydrothermal synthesis followed by one-step calcination. Subsequently, the synthesized Co₃O₄ was transformed into SiC@CoSe₂and SiC@CoSe_2-x respectively through secondary hydrothermal strategy and followed reduction treatment, which endows the SiC@CoSe_2-x nanocomposite with excellent electromagnetic wave absorption performances. Under the combined effect of conductive loss, polarization loss, and magnetic loss, the optimized nanocomposite exhibits a minimum reflection loss (RL_min) of -50.23 dB at a thickness of 1.9 mm and an effective absorption bandwidth (EAB) of 7.84 GHz at a thickness of 2.03 mm, covering portions of the X-band and the entire Ku-band. The electromagnetic attenuation mechanisms were systematically elucidated, revealing the promising potential of CoSe₂-based nanomaterials in electromagnetic wave absorption applications.
- Selenium vacancies,
- CoSe₂,
- Electromagnetic wave attenuation,
- Dielectric loss,
- Dipole polarization
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Constructing selenium-vacancy-rich SiC@CoSe2-x nanocomposites to boost dipole and interfacial polarization for electromagnetic wave absorption

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通讯作者: 陈斌, bchen63@163.com

Constructing selenium-vacancy-rich SiC@CoSe_2-x nanocomposites to boost dipole and interfacial polarization for electromagnetic wave absorption