文献类型：期刊文献

英文题名：Carbon nanotube modified hierarchical NiCo/porous nanocomposites with enhanced electromagnetic wave absorption

作者：Qin, Lan Liu, Shan Yang, Jifei He, Min Yu, Jie

第一作者：Qin, Lan

通信作者：He, M[1];Yu, J[1]

机构：[1]Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China;[2]Anshun Univ, Dept Chem & Chem Engn, Anshun 561000, Guizhou, Peoples R China;[3]Guizhou Inst Technol, Coll Mat & Energy Engn, Guiyang 550003, Peoples R China;[4]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China.

年份：2023

卷号：966

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20233214490025);Scopus(收录号：2-s2.0-85166531666);WOS:【SCI-EXPANDED(收录号:WOS:001052592800001)】；

基金：The authors acknowledge financial support from the National Natural Science Foundation of China (No. 5216030119) , the Youth Growth S & amp; T Personnel Foundation of Guizhou Education Department (KY [2022] 037) , the Science and Technology Project of Guizhou Province (Qian Ke He Zhi Cheng [2023] General 146) .

语种：英文

外文关键词：Microwave absorption; Metal-organic framework; Hierarchical design; Broadband EAB; Synergistic effect

摘要：The rational modulating of the microstructure in magnetic carbon-based composites is crucial to optimize the electromagnetic wave (EMW) absorption performance. It is challenging for EMW absorbers to simultaneously achieve optimal minimum reflection loss (RLmin) and a broadband effective absorption bandwidth (EAB). In this paper, carbon nanotubes (CNTs)-modified NiCo/CNTs nanosheets were effectively prepared as a new EMW absorption material utilizing NiCo-containing metal-organic framework (MOF) as a sacrificial precursor. As expected, NiCo/CNTs-650 demonstrated both a broadband EAB of 7.04 GHz and the RLmin of -58.14 dB at 15.9 GHz with a thickness of 2.0 mm. Furthermore, NiCo/CNTs-650 is capable of achieving 30.2 dB m2 RSC (radar cross section) reduction under an incident angle of 7 degrees via CST, while NiCo/CNTs-70015 % achieved a reduction of 39.47 dB m2 at 0 degrees. These performances outperformed that other CNTs-decorated MOF-derived hierarchical composites previously described. NiCo/CNTs-650 combines the synergistic effects of magnetic loss provided by zero-dimensional (0D) NiCo alloy, dielectric attenuation realized by one-dimensional (1D) CNTs, and optimized impedance matching through two-dimensional (2D) nanosheets with abundant hierarchical in-terfaces. These studies provide a specialized route for the manufacture of mixed-dimensional hierarchical EMW absorbents with high performance.