In Situ Formation of CoS Hollow Nanoboxes Via Ion-Exchange for High-Performance Microwave Absorption

Overview

Journal Nanomaterials (Basel)

Date 2022 Aug 26

PMID 36014741

Authors

Dongwei Xu

Huanhuan Guo

Feifan Zhang

Yanmei Wu

Xiaoqin Guo

Yumei Ren

Desheng Feng

Affiliations

Soon will be listed here.

Abstract

Hollow nanoboxes structure have raised great attention as microwave absorption materials on account of their ultralow density and large specific area. By introducing an adjustable interior cavity structure, the dielectric loss and microwave absorption performance were affected by the tunable complex permittivity and impedance matching was improved. In our study, hollow CoS nanoboxes with designable interspaces were successfully fabricated based on the surfactant-assisted solution method and followed by an in situ ion-exchange process. The structure, elemental compositions and morphology of the products were characterized by XRD, XPS, EDX, SEM and TEM, respectively. In addition, microwave absorption performance and the intrinsic mechanism are investigated in-depth. The paraffin-based composites with 20 wt.% filling contents exhibited superior microwave absorption capacities in view of both maximum reflection loss value (, -54.48 dB) and effective absorption bandwidth (, below -10 dB, 6.0 GHz), which can be ascribed to unique hollow structure and good impedance matching. With these considerations in mind, this study provides a reference for the construction of high-performance microwave absorbers with unique hollow structure.

Citing Articles

Hierarchical dandelion-like CoS hollow microspheres: self-assembly and controllable microwave absorption performance.

Xu D, Zhang F, Guo H, Liu S, Ma S, Guo X RSC Adv. 2023; 13(39):27147-27157.

PMID: 37701276 PMC: 10493571. DOI: 10.1039/d3ra04890j.

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