One-step solution combustion synthesis of pure Ni nanopowders with enhanced coercivity: The fuel effect

Khort, Alexander; Podbolotov, K. B.; Serrano-García, Raquel; Gun’ko, Yurii K.

doi:10.1016/j.jssc.2017.05.043

Cited by 40 publications

(29 citation statements)

References 36 publications

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“…Moreover, the formation of complex bimetallic nanoparticles could prevent crystalline growth during the high-temperature SCS process. As it was shown in our previous works 16,18 , initial nanoparticles of individual metals could significantly grow even during fast SCS reaction. However, we suppose, intensive crystalline growth could be limited, or even prevented by the competing process of the formation of the bimetallic phase.…”

Section: Resultssupporting

confidence: 63%

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

Khort

Romanovski

Leybo

et al. 2020

Sci Rep

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Graphene and its analogs in combination with metal nanopowders are among the most promising catalysts for various industry valuable processes. The newly obtained solution combustion synthesized graphene–Cu and graphene–CuNi nanocomposites were examined in heterogeneous catalysis of thermal activated CO oxidation and photoactivated degradation of acid telon blue and direct blue dyes. The nanocomposites are characterized by a closely connected solution combustion synthesized graphene-metal structure with a number of graphene layers from 1 to 3 and fine metal grains sizes of 31 nm (Cu) and 14 nm (CuNi). The experimental data showed the obtained graphene-metal nanocomposites are among the most effective catalysts for CO oxidation with a temperature of 100% conversion of 150 °C and 200 °C for Cu and CuNi containing catalysts, respectively. At the same time, both nanopowders were found inactive for dyes degradation.

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Section: Resultssupporting

confidence: 63%

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

Khort

Romanovski

Leybo

et al. 2020

Sci Rep

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“…All the samples were synthesized by the microwaveassisted SCS method, applied earlier for metallic nanopowder synthesis [39][40][41]. In general, bismuth(III)-nitrate pentahydrate with 2% excess and CA were dissolved in a minimum volume of acidic aqueous solution in order to prevent bismuth subnitrate precipitation.…”

Section: Methodsmentioning

confidence: 99%

Influence of the La³⁺, Eu³⁺, and Er³⁺ Doping on Structural, Optical, and Electrical Properties of BiFeO₃ Nanoparticles Synthesized by Microwave-Assisted Solution Combustion Method

Wrzesińska

Khort

Bobowska

et al. 2019

Journal of Nanomaterials

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In this study, nanocrystalline (18–28 nm) perovskite-like bismuth ferrite rare earth-doped powders (Bi0.9RE0.1FeO3, where RE = La (BLaFO), Eu (BEuFO), and Er (BErFO)) were obtained by microwave-assisted modification of solution combustion synthesis (SCS). The influence of high load La3+, Eu3+, and Er3+ doping on structural, optical, and electrical properties of BiFeO3 was investigated. It was found that rare earth doping along with fast phase formation and quenching significantly distorts the crystal cells of the obtained materials, which results in the formation of mixed rhombohedral- (R3c-) orthorhombic (Pbnm) crystal structures with decreased lengths of Bi-O and Fe-O bonds along with a decreasing radius size of doping ions. This promotes reduction of the optical band gap energy and suppression of ionic polarization at high frequencies and results in enhanced dielectric permittivity of the materials at 1 MHz.

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“…Furthermore, Ni/NiO core-shell materials are highly electrochemically stable due to alloying effects and structure-induced strain effects. 15,16 Formation of a nickeloxide layer hinders the diffusion of oxygen to make contact with the "buried" nickel crystallites. Hence, the metallic Ni hybridised with NiO would be a suitable candidate for bifunctional applications, and would enhance sorption aer electron transfer as well as electrochemical and catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional hexagonal Ni/NiO nanostructures: influence of the core–shell phase on magnetism, electrochemical sensing of serotonin, and catalytic reduction of 4-nitrophenol

et al. 2019

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Ni 0 /NiO (nickel/nickel oxide) core-shell nanostructures were synthesized through a facile combustible redox reaction. Remarkably, the hetero-phase boundary with different crystalline orientations offered dual properties, which helped in bifunctional catalysis. Presence of a metallic Ni phase changed physicochemical properties and some emerging applications (magnetic properties, optical conductivity, electrochemical sensitivity, catalytic behaviour) could be foreseen. Moreover, formation of a NiO layer on metal surface prevented magnetism-induced aggregation, arrested further oxidation by hindering oxygen diffusion, and acted as a good sorbent to enhance the surface adsorption of the analyte.Hexagonal Ni/NiO nanostructures manifested well-defined ferromagnetic behavior and the catalyst could be collected easily at the end of the catalytic reduction. Ni/NiO core-shell catalysts at the nanoscale had outstanding catalytic performance (reduction of 4-nitrophenol to 4-aminophenol) compared with pure NiO catalysts beyond a reaction time of $9 min. The estimated sensitivity, limit of detection and limit of quantification towards the electrochemical sensing of serotonin were 0.185, 0.43 and 1.47 mM mA À1 , respectively. These results suggest that a bifunctional Ni/NiO nanostructure could be a suitable catalyst for electrochemical detection of serotonin and reduction of 4-nitrophenol.

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One-step solution combustion synthesis of pure Ni nanopowders with enhanced coercivity: The fuel effect

Cited by 40 publications

References 36 publications

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

Influence of the La³⁺, Eu³⁺, and Er³⁺ Doping on Structural, Optical, and Electrical Properties of BiFeO₃ Nanoparticles Synthesized by Microwave-Assisted Solution Combustion Method

Bifunctional hexagonal Ni/NiO nanostructures: influence of the core–shell phase on magnetism, electrochemical sensing of serotonin, and catalytic reduction of 4-nitrophenol

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One-step solution combustion synthesis of pure Ni nanopowders with enhanced coercivity: The fuel effect

Cited by 40 publications

References 36 publications

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

CO oxidation and organic dyes degradation over graphene–Cu and graphene–CuNi catalysts obtained by solution combustion synthesis

Influence of the La3+, Eu3+, and Er3+ Doping on Structural, Optical, and Electrical Properties of BiFeO3 Nanoparticles Synthesized by Microwave-Assisted Solution Combustion Method

Bifunctional hexagonal Ni/NiO nanostructures: influence of the core–shell phase on magnetism, electrochemical sensing of serotonin, and catalytic reduction of 4-nitrophenol

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Influence of the La³⁺, Eu³⁺, and Er³⁺ Doping on Structural, Optical, and Electrical Properties of BiFeO₃ Nanoparticles Synthesized by Microwave-Assisted Solution Combustion Method