ZnFe2O4@SiO2@Polypyrrole nanocomposites with efficient electromagnetic wave absorption properties in the K and Ka band regions

Ge, Yaqing; Li, Cuiping; Waterhouse, Geoffrey I. N.; Zhang, Zhiming; Yu, Liangmin

doi:10.1016/j.ceramint.2020.08.290

Cited by 25 publications

(6 citation statements)

References 41 publications

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“…The electromagnetic interference shielding or microwave absorption characteristics of ZnFe 2 O 4 nanoparticles depend on various factors, including size, morphology, compositions, the thickness of the sample, and composite matrix, etc. [ 64 , 65 , 66 ].…”

Section: Resultsmentioning

confidence: 99%

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

et al. 2021

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Superparamagnetic ZnFe2O4 spinel ferrite nanoparticles were prepared by the sonochemical synthesis method at different ultra-sonication times of 25 min (ZS25), 50 min (ZS50), and 100 min (ZS100). The structural properties of ZnFe2O4 spinel ferrite nanoparticles were controlled via sonochemical synthesis time. The average crystallite size increases from 3.0 nm to 4.0 nm with a rise of sonication time from 25 min to 100 min. The change of physical properties of ZnFe2O4 nanoparticles with the increase of sonication time was observed. The prepared ZnFe2O4 nanoparticles show superparamagnetic behavior. The prepared ZnFe2O4 nanoparticles (ZS25, ZS50, and ZS100) and reduced graphene oxide (RGO) were embedded in a polyurethane resin (PUR) matrix as a shield against electromagnetic pollution. The ultra-sonication method has been used for the preparation of nanocomposites. The total shielding effectiveness (SET) value for the prepared nanocomposites was studied at a thickness of 1 mm in the range of 8.2–12.4 GHz. The high attenuation constant (α) value of the prepared ZS100-RGO-PUR nanocomposite as compared with other samples recommended high absorption of electromagnetic waves. The existence of electric-magnetic nanofillers in the resin matrix delivered the inclusive acts of magnetic loss, dielectric loss, appropriate attenuation constant, and effective impedance matching. The synergistic effect of ZnFe2O4 and RGO in the PUR matrix led to high interfacial polarization and, consequently, significant absorption of the electromagnetic waves. The outcomes and methods also assure an inventive and competent approach to develop lightweight and flexible polyurethane resin matrix-based nanocomposites, consisting of superparamagnetic zinc ferrite nanoparticles and reduced graphene oxide as a shield against electromagnetic pollution.

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Section: Resultsmentioning

confidence: 99%

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

et al. 2021

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“…A similar procedure was reported by Pirsa and Asadzadeh for the preparation of Fe 3 O 4 /SiO 2 /PPy magnetic nanocomposites and they were employed to purify edible sea salts 58 . Ge and associates prepared a series of ZnFe 2 O 4 @SiO 2 @PPy with variable SiO 2 content for improving microwave absorption properties 59 . Snoussi et al .…”

Section: Introductionmentioning

confidence: 93%

“…58 Ge and associates prepared a series of ZnFe 2 O 4 @SiO 2 @PPy with variable SiO 2 content for improving microwave absorption properties. 59 Snoussi et al prepared core/double-layered shell nanocomposites termed as Fe 3 O 4 @NH 2 -SiO 2 @PPy/Pd in three steps and measured the suitability as catalyst for degradation/conversion of some organic pollutants. 60 In a rather different approach, Farghaly and Collinson carried out co-electrodeposition of PPy-SiO 2 -Ag and PPy-SiO 2 nanocomposite film on Au and Ag substrates via electrodeposition as potential devices for applications in electrochemical sensing, energy storage and catalysis.…”

Section: Introductionmentioning

confidence: 99%

Layer‐by‐layer preparation of electromagnetic NH₂‐SiO₂/polypyrrole/Ni nanocomposites, characterization and their electrochemical properties

Ali

Rahman

Minami

et al. 2022

Polymer International

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Combinations of organic conducting polymers and inorganic electromagnetic materials have drawn much attention in various fields like energy storage materials, biosensors, biomedical applications, catalysis and removal of heavy metals from water. In this investigation an attempt is made to decorate polypyrrole (PPy), a semiconducting electroactive polymer, with Ni nanoparticles on a functional silica (SiO 2 ) support. First, amine-functionalized mesoporous NH 2 -SiO 2 seed particles are prepared by the sol-gel method using hexamethylenediamine as a surface-functionalizing agent and cetyltrimethylammonium bromide as a template. Second, NH 2 -SiO 2 /PPy composite particles are prepared via in situ seeded chemical oxidative polymerization of pyrrole. The surface of the NH 2 -SiO 2 /PPy composite particles is finally immobilized/doped with Ni nanoparticles via in situ chemical reduction of Ni(II) salt. The surface morphology, structure modification, size distribution and magnetic properties of the prepared NH 2 -SiO 2 /PPy/Ni nanocomposite particles are confirmed using various spectroscopic techniques, electron microscopy, Brunauer-Emmett-Teller measurements, X-ray diffraction and vibrating sample magnetometry. The NH 2 -SiO 2 /PPy/Ni nanocomposite particles possess good paramagnetic properties. A comparative study of electrochemical properties revealed improvement in specific capacitance of NH 2 -SiO 2 /PPy composite compared to PPy but further decoration with Ni nanoparticles under alkaline condition reduces the capacitance value.

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“…In addition, structure engineering by coating dielectric components on a magnetic core provides a good opportunity to tune the EM parameters, including inorganic materials (such as SnO 2 [16] TiO 2 , [17] Al 2 O 3 ) [18] and organic materials (such as polydopamine, [19] PEDOT, [20] polypyrrole). [21] For example, Fe@Al 2 O 3, [18] ZnFe 2 O 4 -ZnO-Fe@C , [22] Fe/Fe 4 N@SiO 2 , [23] Fe 3 O 4 @PEDOT. [24] Based on the intrinsic strong conduction loss properties, conductive polymers have the potential to improve the overall conductivity and modulate the impedance matching.…”

Section: Introductionmentioning

confidence: 99%

“…[24] Based on the intrinsic strong conduction loss properties, conductive polymers have the potential to improve the overall conductivity and modulate the impedance matching. [9,21,25] For example, Jiang et al formed coating microporous polymers on Fe─C improving the wave absorption performance and the RL min is −58.66 dB. [26] Xie et al prepared Molybdate@Carbon with utilized a pyrrole oxidation polymerization method and EAB is 4.75 GHz.…”

Section: Introductionmentioning

confidence: 99%

Wrinkle Structure Regulating Electromagnetic Parameters in Constructed Core‐shell ZnFe₂O₄@PPy Microspheres as Absorption Materials

Li,

Zhu,

Rao

et al. 2023

Small

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Structure engineering of magnetic‐dielectric multi‐components is emerging as an effective approach for presuming high‐performance electromagnetic (EM) absorption, but still faces bottlenecks due to the ambiguous regulation mechanism of surface morphology. Here, a novel wrinkled surface structure is tailored on the ZnFe2O4 microsphere via a spray‐pyrolysis induced Kirkendall diffusion effect, the conductivity of the sample is affected, and a better impedance matching is adjusted by modulating the concentration of metal nitrate precursors. Driven by a vapor phase polymerization, conductive polypyrrole (PPy) shell are in situ decorated on the ZnFe2O4 microsphere surfaces, ingeniously constructing a core‐shell ZnFe2O4@PPy composites. Moreover, a systematic investigation reveals that this unique wrinkled surface structure is highly dependent on the metal salt concentration. Optimized wrinkle ZnFe2O4@PPy composite exhibits a minimum reflection loss (RLmin) reached −41.0 dB and the effective absorption bandwidth (EAB) can cover as wide as 4.1 GHz. The enhanced interfacial polarization originated from high‐density ZnFe2O4‐PPy heterostructure, and the conduction loss of PPy contributes to the boosted dielectric loss capability. This study gives a significant guidance for preparing high‐performance EM composites by tailoring the surface wrinkle structure.

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ZnFe2O4@SiO2@Polypyrrole nanocomposites with efficient electromagnetic wave absorption properties in the K and Ka band regions

Cited by 25 publications

References 41 publications

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

Layer‐by‐layer preparation of electromagnetic NH₂‐SiO₂/polypyrrole/Ni nanocomposites, characterization and their electrochemical properties

Wrinkle Structure Regulating Electromagnetic Parameters in Constructed Core‐shell ZnFe₂O₄@PPy Microspheres as Absorption Materials

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ZnFe2O4@SiO2@Polypyrrole nanocomposites with efficient electromagnetic wave absorption properties in the K and Ka band regions

Cited by 25 publications

References 41 publications

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

Layer‐by‐layer preparation of electromagnetic NH2‐SiO2/polypyrrole/Ni nanocomposites, characterization and their electrochemical properties

Wrinkle Structure Regulating Electromagnetic Parameters in Constructed Core‐shell ZnFe2O4@PPy Microspheres as Absorption Materials

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Layer‐by‐layer preparation of electromagnetic NH₂‐SiO₂/polypyrrole/Ni nanocomposites, characterization and their electrochemical properties

Wrinkle Structure Regulating Electromagnetic Parameters in Constructed Core‐shell ZnFe₂O₄@PPy Microspheres as Absorption Materials