PVP-assisted MOF-derived FeO/C Powders for Microwave Absorption Applications

Overview

Journal Heliyon

Specialty Social Sciences

Date 2025 Jan 6

PMID 39758402

Authors

V Kavoosi

S M Masoudpanah

Affiliations

Soon will be listed here.

Abstract

Metal-organic framework (MOF) derived porous FeO/C powders were applied for absorption of microwaves in the frequency range of 1-18 GHz. The effects of the polyvinylpyrrolidone (PVP) additive on the synthesis of MIL101-(Fe) precursor were studied by various characterization methods. By adding PVP, the impure hematite phase (α-FeO) with magnetite phase (FeO) was disappeared and the particular morphology was transformed to the porous rod-like, leading to the increase of specific surface area from 150 to 282 m/g. Furthermore, the saturation magnetization (Ms) of FeO/C powders reached a maximum value of 47 emu/g at a proper amount of PVP. A thin absorber (2.6 mm) made of 50 wt% FeO/C powders and 50 wt % paraffine absorbed the whole of X frequency band (8-12 GHz) with a minimum reflection loss of -20 dB at a matching frequency of 10 GHz. Adjusting the permittivity and permeability parameters of the FeO/C powders via adding PVP was responsible for their better microwave absorption performance.

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