文献类型：期刊文献

英文题名：Yolk-shell ZnO/C@air@CoNi nanocages derived from bimetallic MOFs for boosted electromagnetic wave absorption

作者：Wang, Yizhe[1,2];Yuan, Ye[2];Li, Siyue[2];Zuo, Peiyuan[2];Liu, Xiaoyun[2];Zhuang, Qixin[2]

机构：[1]Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810016, Qinghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China

年份：2026

卷号：1079

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20263021154943);Scopus(收录号：2-s2.0-105045279546);WOS:【SCI-EXPANDED(收录号:WOS:001833644400001)】；

基金：This work was supported by the National Natural Science Foundation of China (52373073, 52303083, 22171086, 52573077) , the Shanghai Rising-Star Program (24QA2701800) , and the Fundamental Research Funds for the Central Universities (No. JKD01261701, JKD01251501) .

语种：英文

外文关键词：Controlled ion-exchange etching; Yolk-shell; ZnO/C@air@CoNi; Electromagnetic wave absorption

摘要：The dielectric-magnetic synergy and interfacial engineering is an important methodology to boost electromagnetic wave absorption performance. We herein propose a novel "coating-ion exchange etching-high temperature carbonization" process to synthesize yolk-shell zinc oxide/carbon@air@cobalt-nickel alloy (ZnO/ C@air@CoNi) nanocages by taking advantages of dielectric-magnetic synergy and interfacial effect. The bimetallic core-shell ZIF-8@ZIF-67 precursor is employed as the structural template while Ni(NO3)2 & sdot;6H2O as an etchant to ensure controlled ion-exchange etching. The resulting dielectric zinc oxide/carbon (ZnO/C) core promotes interfacial polarization and dipole reorientation losses, while the CoNi shell enhances conductive loss and magnetic loss. Thanks to the dielectric-magnetic synergy and interfacial effect, the ZnO/C@air@CoNi nanocomposite exhibits outstanding electromagnetic wave absorption performance, achieving a maximum reflection loss of -72.28 dB and an effective absorption bandwidth of 5.28 GHz (12.40 -17.68 GHz) at a low filler loading of 20 wt%. This work provides new ideas to design absorbers by leveraging the structural versatility of MOF-derived precursors.