Synthesis of 3D cruciform CuZn@N-doped carbon with enhanced heterogeneous interfaces for high-efficiency electromagnetic wave absorption in C, X and Ku bands

被引：0

作者：

Bai, Wenhao ^{[1
,2
,3
]}

Wang, Weijie ^{[1
,3
]}

Zhai, Jianyu ^{[1
,2
,3
]}

Yan, Jiatong ^{[1
,3
]}

Cui, Ce ^{[1
,4
]}

Jiang, Shan ^{[1
,3
]}

Tang, Hong ^{[5
]}

He, Weiping ^{[2
]}

Guo, Ronghui ^{[1
,3
]}

机构：

[1] Sichuan Univ, Coll Biomass Sci & Engn, Chengdu 610065, Peoples R China

[2] China Special Vehicle Res Inst, Aviat Key Lab Sci & Technol Struct Corros Prevent, Jingmen 448035, Peoples R China

[3] Sichuan Univ, Yibin Ind Technol Res Inst, Yibin 644000, Peoples R China

[4] South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510641, Peoples R China

[5] Kyoto Univ, Grad Sch Energy Sci, Kyoto 6068501, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1025卷

基金：

中国国家自然科学基金;

关键词：

Electromagnetic wave absorption; CuZn@N-doped Carbon. 3D cruciform; Heterogeneous interfaces; Dielectric loss; COMPOSITE; LIGHTWEIGHT; MOF;

D O I：

10.1016/j.jallcom.2025.180347

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electromagnetic pollution makes high-efficiency microwave absorption increasingly significant. Preparation of non-magnetic bimetallic MOFs derivatives is an effective strategy to break the mindset of magnetic derivatives designing electromagnetic wave absorption materials. Herein, 3D cruciform CuZn MOF was creatively synthesized by in-situ growth and further carbonization to form CuZn@N-doped carbon (CuZn@NC). Benefited from the enhanced coupling interaction and interfacial polarization, 3D cruciform CuZn@NC possesses multiple ultra-strong absorption peaks exceeding -50 dB in C, X and Ku band. The effective absorption bandwidths (EABs) of CuZn@NC reach 6.4 GHz at 2.38 mm and 4 GHz at 3.3 mm, which realizes the complete coverage of Ku and X band, respectively. In addition, all the reduction of the radar cross section (RCS) of CuZn@NC-900-25 exceeds -18 dB m(2) in the entire simulation detection angle range (-90 degrees < theta < 90 degrees), which means that the samples can effectively attenuate more than 98 % radar monitoring signal in any directions, showing superior practical application value. The 3D cruciform CuZn@NC exhibits the characteristics of strong reflection loss, low thickness, ultra-wide EAB, non-toxic and pollution-free. This work demonstrates that non-magnetic composites also exist excellent electromagnetic wave attenuation ability through constructing reasonable hierarchical constituent and heterogeneous interfaces.

引用

页数：10