A novel approach for the fabrication of Cobalt ferrite and Nickel ferrite nanoparticles—magnetic and electrocatalytic studies

Krishnan, Raji R.; Prasannakumar, Anandhu Thejas; Chandran, Shine R.; Prema, K. H.

doi:10.1007/s10854-022-08586-y

Cited by 9 publications

(3 citation statements)

References 88 publications

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“…The green mediated sol-gel method was used to synthesize nickel ferrite nanoparticles as reported in our previous work. 19 In 25 mL lime juice, nickel nitrate, and ferric nitrate were dissolved in a 1:2 ratio. By heating the solution to 60 C, it was concentrated into gel form.…”

Section: Preparation Of Ferrite Nano Particles (Nife)mentioning

confidence: 99%

A green mediated synthesis of glass fiber‐nickel ferrite‐ polyaniline ternary composite: An excellent thermal stability and outstanding electromagnetic interference shielding performance

Chandran,

Krishnan,

Johnson

et al. 2024

J of Applied Polymer Sci

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The present study reports the preparation of a ternary composite with enhanced shielding performance toward electromagnetic waves using in situ polymerization of aniline on fiber‐ferrite binary composite. The polymerization is carried out in a green medium lime juice, which acts as an efficient dopant. The composite is amalgamated with varying weight percentages of ferrite (ranging from 25% to 100%) while maintaining a constant weight percentage of fiber. The presence of the fiber in the binary and ternary composite could enhance the thermal stability of the material, highlighting its applicability in a wide range of temperatures. The DC conductivity, AC conductivity, and dielectric properties are investigated, revealing significant performance enhancements. The ternary composite demonstrates excellent conductivity in the range of 10−210−1 S/cm, attributed to the polaron/bi‐polaron interaction paradigm. Furthermore, the electromagnetic interference shielding, microwave absorption, and reflection capabilities of the composites are assessed within the frequency range of 8–12 GHz. The optimized composite, featuring aniline (0.4 M) and glass fiber with ferrite in a 1:1 ratio, exhibits an outstanding shielding value of 32 dB. These results point toward the potential of this ternary composite material as an effective shield against electromagnetic pollution.

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Section: Preparation Of Ferrite Nano Particles (Nife)mentioning

confidence: 99%

A green mediated synthesis of glass fiber‐nickel ferrite‐ polyaniline ternary composite: An excellent thermal stability and outstanding electromagnetic interference shielding performance

Chandran,

Krishnan,

Johnson

et al. 2024

J of Applied Polymer Sci

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“…6 The obtained sample of NiFe 2 O 4 nanorods at 350 °C presented efficient OER and required 342 mV to achieve a current density of 10 mA•cm −2 with a small Tafel slope of 44 mV• dec −1 . Krishnan et al 7 efficient water-splitting electrocatalysts with high magnetic and electrical properties. The modified electrode in an alkaline environment showed enhanced OER with an overpotential of 410 mV at 10 mA•cm −2 and a Tafel slope of 126 mV•dec −1 .…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Electrocatalytic Response of Zn-Substituted Nickel Ferrite for Overall Water Splitting

Khan,

Rahman,

Chae

et al. 2024

ACS Appl. Energy Mater.

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Nickel ferrites (NiFe 2 O 4 ) having rich redox chemistry are regarded as proficient electrocatalysts for sustainable and renewable energy applications. However, its entire potential as an electrode material is limited by its weak structural characteristics and inadequate charge transport qualities. This work reports a series of zinc-substituted inverse spinel ferrites (Zn x Ni 1−x Fe 2 O 4 ) synthesized by a simple and environmentally benign hydrothermal method as electrocatalysts for overall water splitting. The surface morphology, structural elements, and electronic properties of resultant materials are significantly changed by Zn inclusion. Among different compositions, the ferrite sample Zn 0.5 Ni 0.5 Fe 2 O 4 showed outstanding water splitting performances, with a current density of 100 mA•cm −2 for OER and HER at the cost of 290 mV and 311 mV overpotentials, respectively. The electrode demonstrated lower Tafel slopes of 56 and 46 mV•dec −1 for HER and OER with a high turnover frequency (TOF) and exchange current density (j 0 ). Significantly, this electrode demanded a cell voltage of 1.48 V in a two-electrode electrolyzer to deliver 10 mA•cm −2 and showed good stability for 24 h. This is attributed to the efficient charge transport properties of the Zn-incorporated NiFe 2 O 4 with high electrical conductivity and charge transfer characteristics. Overall, the findings highlighted the potential of Zn-incorporated NiFe 2 O 4 as a promising electrocatalyst for renewable hydrogen production.

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“…In this paper, we offer a novel and industrially demanding approach for the synthesis of nickel nanoparticles in the bulk level using a green-based sol–gel auto combustion process, which is an extension of our earlier work related to the novel synthesis of silver 45 and ferrite 46 nanoparticles. In this study, pure lemon juice is adopted as a green medium and reducing agent for the sol–gel synthesis of NNP, which can effectively replace all other conventional reducing agents.…”

Section: Introductionmentioning

confidence: 99%

Integrating thermodynamics towards bulk level synthesis of nano Ni catalysts: a green mediated sol–gel auto combustion method

2023

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A novel approach for the fabrication of Cobalt ferrite and Nickel ferrite nanoparticles—magnetic and electrocatalytic studies

Cited by 9 publications

References 88 publications

A green mediated synthesis of glass fiber‐nickel ferrite‐ polyaniline ternary composite: An excellent thermal stability and outstanding electromagnetic interference shielding performance

A green mediated synthesis of glass fiber‐nickel ferrite‐ polyaniline ternary composite: An excellent thermal stability and outstanding electromagnetic interference shielding performance

Unraveling the Electrocatalytic Response of Zn-Substituted Nickel Ferrite for Overall Water Splitting

Integrating thermodynamics towards bulk level synthesis of nano Ni catalysts: a green mediated sol–gel auto combustion method

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