Simultaneous Manipulation of Interfacial and Defects Polarization toward Zn/Co Phase and Ion Hybrids for Electromagnetic Wave Absorption,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Simultaneous Manipulation of Interfacial and Defects Polarization toward Zn/Co Phase and Ion Hybrids for Electromagnetic Wave Absorption
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-09-14 , DOI: 10.1002/adfm.202106677
Zhenguo Gao ₁ , Di Lan ₁ , Limin Zhang ₁ , Hongjing Wu ₁

Affiliation

Rational manipulation of multimetal hybrid materials (HMs) with tunable substitution or phases is evolving as an effective strategy to meet the controllable electromagnetic (EM) properties and EM wave (EMW) absorption. Herein, a new thermodynamic and kinetic cocontrol strategy is proposed to construct Zn/Co bimetal HMs with tuning ion and phase hybridization for synergistic effect on EM properties for the first time. Auxiliary chelating agent triethanolamine (TEA) dominates the phase separation by stepwise Zn/Co deposition in metal–organic frameworks, then the pyrolysis process under gradient temperature give rise to controllable ion hybridization products due to thermal motion. Benefiting from the tunable collaboration between defects polarization and interfacial polarization, the 700 °C HMs exhibit ultrahigh EM parameters and EMW absorption, of which products with no TEA deliver the effective absorbing bandwidth of 4.80 GHz (1.6 mm) and minimum reflection loss of −45.85 dB. The results indicated that synergistic effect of ion and phase hybridization can improve the defects induced “polarization centers” and coherent interfaces induced interfacial polarization. Furthermore, the comprehensive research and deep understanding on respective contribution of hybridization forms provide a precise inspiration in developing bimetal and even multimetal ferrite with tunable hybridization structure.

中文翻译：

用于电磁波吸收的 Zn/Co 相和离子杂化物的界面极化和缺陷极化的同时处理

具有可调取代或相位的多金属杂化材料 (HM) 的合理操作正在发展成为满足可控电磁 (EM) 特性和 EM 波 (EMW) 吸收的有效策略。在此，首次提出了一种新的热力学和动力学协同控制策略来构建具有调谐离子和相杂化的 Zn/Co 双金属 HMs，以实现对 EM 特性的协同效应。辅助螯合剂三乙醇胺 (TEA) 通过在金属-有机骨架中逐步沉积 Zn/Co 来主导相分离，然后梯度温度下的热解过程由于热运动产生可控的离子杂化产物。受益于缺陷极化和界面极化之间的可调协作，700°C HMs 表现出超高的 EM 参数和 EMW 吸收，其中不含 TEA 的产品可提供 4.80 GHz (1.6 mm) 的有效吸收带宽和 -45.85 dB 的最小反射损耗。结果表明，离子和相杂化的协同效应可以改善缺陷诱导的“极化中心”和相干界面诱导的界面极化。此外，对杂化形式各自贡献的全面研究和深入理解为开发具有可调杂化结构的双金属甚至多金属铁氧体提供了精确的灵感。结果表明，离子和相杂化的协同效应可以改善缺陷诱导的“极化中心”和相干界面诱导的界面极化。此外，对杂化形式各自贡献的全面研究和深入理解为开发具有可调杂化结构的双金属甚至多金属铁氧体提供了精确的灵感。结果表明，离子和相杂化的协同效应可以改善缺陷诱导的“极化中心”和相干界面诱导的界面极化。此外，对杂化形式各自贡献的全面研究和深入理解为开发具有可调杂化结构的双金属甚至多金属铁氧体提供了精确的灵感。

更新日期：2021-09-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11