Morphology-controlled CoNi/C hybrids with bifunctions of efficient anti-corrosion and microwave absorption

作     者：Jianwen Ge Yu Cui Jiaxin Qian Li Liu Fandi Meng Fuhui Wang Jianwen Ge;Yu Cui;Jiaxin Qian;Li Liu;Fandi Meng;Fuhui Wang

作者机构：Shenyang National Laboratory for Materials ScienceNortheastern UniversityShenyang 110819China Shi-changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第102卷第7期

页      面：24-35页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Nos. U20B2026 and 51871049)。 

主　　题：Electromagnetic response Morphological-anisotropic Anticorrosive ZIF-67 

摘      要：Till now,fewer literatures have investigated the corrosion resistance of microwave absorbers,especially mental@C/carbon matrix derived from MOF composites,although it is known that carbon shells possess a protective effect.Herein,three kinds of morphology-controlled CoNi/C-N doped architectures were suc-cessfully fabricated via a sequence of processing,namely coprecipitation for ZIF-67,subsequent Ni^(2+) ex-change and ultimate carbonization.Apart from composition characterization,the effects of microstructure tailoring and temperature controlling on electromagnetic response as well as attenuation performance were revealed,where dodecahedron-shaped composites possessed the highest permittivity.By contrast,rod-shaped composites(CoNi/C-r-550 and CoNi/C-r-700)were endowed with superior comprehensive ab-sorption properties,e.g.,RL_(min):-49.8 dB and-64.0 dB;EAB:5.7 GHz and 4.8 GHz,respectively.Besides,samples CoNi/C-d-700 and CoNi/C-r-700 present higher corrosion potential(E_(corr))and lower corrosion current(I corr).Hence,these corrosion-resistant microwave absorbers with outstanding absorption stabil-ity,wetting effect as well as environmental adaptability,can be used as a candidate/raw material for intelligent devices.