物理化学学报 >> 2026, Vol. 42 >> Issue (9): 100348.doi: 10.1016/j.actphy.2026.100348

所属专题： 2026年度《物理化学学报》“新锐科学家”专刊

论文 上一篇    

双金属MOFs中精确设计的异质界面实现多尺度极化协同效应用于高效电磁衰减

杨世豪1,†, 郭志强1,*,†(), 贾梓睿1,*(), 刘翌1, 王丁硕1, 李增超1, 李海丰2, 邱华3, 吴广磊1,*()   

  1. 1 青岛大学材料科学与工程学院, 山东省低维材料与聚合物复合材料重点实验室, 山东 青岛 266071
    2 湖北汽车工业学院汽车材料学院, 湖北 十堰 442002
    3 西北工业大学化学与化工学院, 陕西 西安 710072
  • 收稿日期:2026-04-02 修回日期:2026-06-11 录用日期:2026-06-11 发布日期:2026-07-03
  • 通讯作者: Email: guozq2022@163.com (郭志强)jiazirui@qdu.edu.cn (贾梓睿)wuguanglei@mail.xjtu.edu.cn/wuguanglei@qdu.edu.cn (吴广磊)
  • 作者简介:

    †这些作者对本工作做出了同等贡献

Precisely engineered heterointerfaces in bimetallic MOFs enable multiscale polarization synergy for efficient electromagnetic attenuation

Shihao Yang1, Zhiqiang Guo1,*(), Zirui Jia1,*(), Yi Liu1, Dingshuo Wang1, Zengchao Li1, Haifeng Li2, Hua Qiu3, Guanglei Wu1,*()   

  1. 1 College of Materials Science and Engineering, Shandong Key Laboratory of Low Dimensional Materials and Polymer Composites, Qingdao University, Qingdao 266071, Shandong Province, China
    2 School of Automotive Materials, Hubei University of Automotive Technology, Shiyan 442002, Hubei Province, China
    3 School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi Province, China
  • Received:2026-04-02 Revised:2026-06-11 Accepted:2026-06-11 Published:2026-07-03
  • Contact: Email: guozq2022@163.com (Zhiqiang Guo)jiazirui@qdu.edu.cn (Zirui Jia)wuguanglei@mail.xjtu.edu.cn/wuguanglei@qdu.edu.cn (Guanglei Wu)

RichHTML

12

PDF

165

赞

补充材料

1

摘要：

基于金属有机框架(MOF)衍生物的多组分界面工程在实现高性能电磁波(EMW)吸收方面具有巨大潜力。然而，精确控制异质界面构型及其相关极化机制仍是一个重大科技难题。本研究开发了一种基于双金属MOF前驱体的可控热解-硒化策略，用于制备ZnSe/Cu2Se多相复合材料。通过前驱体结构设计和硒化程度的精准调控，实现了形貌与异质界面的双重精确控制。多尺度表征、有限元模拟和密度泛函理论(DFT)计算共同表明：Cu2Se在碳骨架内形成了高效导电网络，产生显著传导损耗；同时两种金属硒化物的共存构建了大量异质界面，极大增强了界面极化损耗。此外，缺陷诱导极化和偶极子极化产生了活性位点，实现多尺度极化协同耗散电磁波。最终优化后的复合材料展现出卓越的电磁波吸收性能，其最小反射损耗(RLmin)达−52.63 dB，最大有效吸收带宽(EABmax)为8.64 GHz。本研究提出了一种精确调控基于MOF衍生的双金属硒化物异质界面的策略，为理解高效衰减电磁波所需的多尺度极化协同机制提供了理论基础。

关键词: 多组分界面, 双金属硒化物, 多尺度极化协同, 电磁波吸收

Abstract:

Multicomponent interface engineering based on metal-organic framework (MOF) derivatives holds great potential for achieving high-performance electromagnetic wave (EMW) absorption. However, precisely controlling heterointerface configurations and their associated polarization mechanisms remains a significant scientific and technical hurdle. In this study, a controlled pyrolysis-selenization strategy based on bimetallic MOF precursors was developed to prepare ZnSe/Cu2Se multiphase composites. The rational engineering of precursor architecture and selenization degree achieves precise dual-control over morphology and heterointerfaces. Multiscale characterization, finite element simulations, and density functional theory (DFT) calculations collectively demonstrate that Cu2Se forms an efficient conductive network within the carbon framework, leading to significant conductive loss. Simultaneously, the coexistence of the two metallic selenides creates numerous heterointerfaces which greatly enhance interfacial polarization losses. Additionally, defect-induced and dipole polarizations generate active sites that dissipate EMW through multiscale polarization synergy. Ultimately, the optimized composite exhibits outstanding EMW absorption performance, with a minimum reflection loss (RLmin) of −52.63 dB and a maximum effective absorption bandwidth (EABmax) of 8.64 GHz. This study introduces a precise strategy for engineering heterointerfaces in MOF-derived bimetallic selenides, offering fundamental insights into the multiscale polarization synergy crucial for efficient EMW attenuation.

Key words: Multicomponent interface, Bimetallic selenides, Multiscale polarization synergy, Electromagnetic wave absorption