CoFeO Nanoparticles Grown Within Porous AlO and Immobilized on Graphene Nanosheets: A Hierarchical Nanocomposite for Broadband Microwave Absorption

Overview

Journal ACS Omega

Publisher American Chemical Society

Specialty Chemistry

Date 2022 Aug 22

PMID 35990457

Authors

Debika Gogoi

Raghavendra Korde

Virendra Singh Chauhan

Manoj Kumar Patra

Debmalya Roy

Manash R Das

Narendra Nath Ghosh

Affiliations

Soon will be listed here.

Abstract

Demands to develop efficient microwave-absorbing materials are increasing with the advancement of information technology and the exponential rise in the usage of electromagnetic devices. To reduce electromagnetic interference and to overcome the adverse effects caused by microwave exposure resulting from the excessive usage of electromagnetic devices, microwave absorbers are very necessary. In addition, radar-absorbing materials are essential for stealth technology in military applications. Herein, we report a nanocomposite in which CoFeO (CF) nanoparticles were grown within the porous structure of AlO (PA), and this CoFeO-loaded AlO (PA-CF) nanocomposite was immobilized on the surface of nanometer-thin graphene sheets (Gr). Owing to the hierarchical structure created by the constituents, the (60PA-40CF)-Gr nanocomposite exhibited excellent microwave-absorption properties in the X-band region with a reflection loss (RL) value of ∼-30.68 dB (∼99.9% absorption) at 10.71 and 9.04 GHz when thicknesses were 2.0 and 2.3 mm, respectively. This nanocomposite demonstrated its competence as a lightweight, high-performance microwave absorber in the X-band region, which can be utilized in the applications of pioneering stealth technology.

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