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具有优异微波吸收性能的中空核壳结构ZnFeO@C纳米球的合成

Synthesis of hollow core-shell ZnFeO@C nanospheres with excellent microwave absorption properties.

作者信息

Hao Huimin, Wang Liming, Xu Lihui, Pan Hong, Cao Liuqi, Chen Kouqin

机构信息

School of Textiles and Fashion, Shanghai University of Engineering Science Shanghai 201620 China

出版信息

RSC Adv. 2022 Apr 7;12(17):10573-10583. doi: 10.1039/d2ra01022d. eCollection 2022 Mar 31.

DOI:10.1039/d2ra01022d
PMID:35425006
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8987361/
Abstract

The special hollow core-shell structure and excellent dielectric-magnetic loss synergy of composite materials are two crucial factors that have an important influence on the microwave absorption properties. In this study, hollow ZnFeO nanospheres were successfully synthesized by a solvothermal precipitation method firstly; based on this, a C shell precursor phenolic resin was coated on the ZnFeO hollow nanospheres' surface by an oxidative polymerization method, and then ZnFeO@C was obtained by high-temperature calcination. Samples were characterized by SEM, TEM, XRD, XPS, BET, VSM, VNA. The results show that the maximum reflection loss (RL) reaches -50.97 dB at 8.0 GHz, and the effective bandwidth (EAB) of hollow core-shell structure ZnFeO@C is 3.2 GHz (6.16-9.36 GHz) with a coating thickness of 3.5 mm. This work provides a useful method for the design of lightweight and high-efficiency microwave absorbers.

摘要

复合材料特殊的中空核壳结构和优异的介电-磁损耗协同效应是对微波吸收性能有重要影响的两个关键因素。本研究首先通过溶剂热沉淀法成功合成了中空ZnFeO纳米球；在此基础上，采用氧化聚合法在ZnFeO中空纳米球表面包覆C壳前驱体酚醛树脂，然后通过高温煅烧得到ZnFeO@C。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射仪（XRD）、X射线光电子能谱仪（XPS）、比表面积分析仪（BET）、振动样品磁强计（VSM）、矢量网络分析仪（VNA）对样品进行了表征。结果表明，在8.0 GHz时最大反射损耗（RL）达到-50.97 dB，中空核壳结构ZnFeO@C在涂层厚度为3.5 mm时有效带宽（EAB）为3.2 GHz（6.16-9.36 GHz）。这项工作为轻质高效微波吸收剂的设计提供了一种有用的方法。

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