Preparation and magnetic properties of nickel nanoparticles via the thermal decomposition of nickel organometallic precursor in alkylamines

Chen, Yuanzhi; Peng, Dong‐Liang; Lin, Dongxin; Luo, Xiaohua

doi:10.1088/0957-4484/18/50/505703

Cited by 213 publications

(160 citation statements)

References 26 publications

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“…Note the systematic reduction of TB of hcp phase as the particle size increases from 3.8 nm to 6.0 nm through 4.0 nm. Relatively lower TB in the present samples, compared to those of distinct mixture of two phases or only hcp phase [18,43], is tentatively attributed to close proximity interaction with fcc phase and or related to the much smaller particle size for hcp phase in the naturally coexisting core-shell structure. In the larger particle size samples, only a single peak each in ZFC data is apparent supporting the finding from XRD analysis of pure fcc phase.…”

Section: Magnetization Studymentioning

confidence: 61%

“…This is applied in mixture of hcp and fcc structures of 8.5 nm and 18 nm Ni nanoparticles, leading to exhibition of two distinct zero-field cooled (ZFC) magnetization peaks due to the superparamagnetic blocking (TB) at 12 K and 220 K, respectively [18]. They are further corroborated with ZFC magnetization peak at ~ 12 K of pure hcp Ni of 12.9 nm and above 300 K of pure fcc Ni of ~30nm [43]. Considering that these situations are applicable in the present samples, we assign double peaks in ZFC magnetization data ( Figure 10) at 5 K and 200.9 K of 3.8 nm sample, 3.2 K and 117.4 K of 4 nm sample, less than 2 K and 81.9 K of 6.0 nm sample due to the presence of hcp and fcc phases in these smaller particle size samples.…”

Section: Magnetization Studymentioning

confidence: 76%

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Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

et al. 2016

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We have investigated the core issue of atomic lattices in monodispersed Ni nanoparticles (NPs) of sizes 3.8 nm to 10.1 nm using detailed analysis of X-ray diffraction, synchrotron radiation X-ray absorption spectroscopy (XAS) and magnetization data. This has revealed the very remarkable coexistence of atomic face-centered cubic (fcc) and hexagonal closed-packed (hcp) lattices in samples with particle size ≤ 6.0 nm with the prevalence of only fcc phase beyond this. They are also associated with reduced coordination number, modified electronic structure, and surface atom coordination with ligands. Magnetization data furthermore reveal coexistence of ferromagnetism and superparamagnetism at 300 K. Considered to be due to dominant roles of ligands, they are likely to open up far-reaching implications to their future applications.

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Section: Magnetization Studymentioning

confidence: 61%

Section: Magnetization Studymentioning

confidence: 76%

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

et al. 2016

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“…29,30 Besides, the blocking temperature (T B ) of the hcp Ni nanoparticles is tested to be around 12 K, much lower than that of fcc Ni (above 300 K). 9 A sharp T B peak always exists in the M-T curves of hcp Ni nanoparticles around 12-13 K, whereas that of fcc Ni nanoparticles is broad and size dependent. 30 To get further information on magnetic properties and confirm the correlation between structure and the magnetic behaviors, at first the M-T measurements were performed.…”

Section: Meanwhile As Shown In Supporting Informationmentioning

confidence: 94%

Synthesis of Ni nanoparticles with controllable magnetic properties by atmospheric pressure microplasma assisted process

Lin

Starostin³

et al. 2017

AIChE Journal

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An atmospheric pressure microplasma technique is demonstrated for the gas phase synthesis of Ni nanoparticles by plasma-assisted nickelocene dissociation at different conditions. The dissociation process and the products are characterized by complementary analytical methods to establish the relationship between operational conditions and product properties. The innovation is to show proof-of-principle of a new synthesis route which offers access to less costly and less poisonous reactant, a higher quality product, and a simple, continuous and pre/post treatment-free manner with chance for fine-tuning "in-flight." Results show that Ni nanoparticles with controllable magnetic properties are obtained, in which flexible adjustment of product properties can be achieved by tuning operational parameters. At the optimized condition only fcc Ni nanoparticles are formed, with saturation magnetization value of 44.4 mAm 2 /g. The upper limit of production rate for Ni nanoparticles is calculated as 4.65 3 10 23 g/h using a single plasma jet, but the process can be scaled-up through a microplasma array design. In addition, possible mechanisms for plasma-assisted nickelocene dissociation process are discussed.

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“…Literature reports the synthesis of nickel nano particles using microwave assisted synthesis (Lai et (Harish et al, 2011), thermal decomposition of nickel (II) acetylacetonate in alkylamines (Chen et al, 2007) and sol-gel methods (Jia et al, 2008).…”

Section: Synthesis Of Nickel Based Nanoparticles By Physical / Chemicmentioning

confidence: 99%

Nickel Based Nano Particles as Adsorbents in Water Purification Methods - A Review

Ravindhranath¹,

Ramamoorty²

2017

Orient. J. Chem

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Nickel based nano particles are metallic Ni and NiO. These materials find wide utility in various fields in view of their high surface potentials, surface area, semi conducting nature, reduction and complexing tendencies. The present review is mainly aimed at the investigations made in using these nano nickel particles as adsorbents in purifying water. The synthesis of nano particles of Ni/ NiO adopting the conventional physical/chemical methods, their draw backs and the progress so far made in the green synthesis of particles using plant extracts as reducing, capping and stabilizing argents, are also emphatically discussed. Further, the potential areas of research with respect to the green synthesis of the said nano particles and their applications to water purification are identified and comprehensively presented.

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Preparation and magnetic properties of nickel nanoparticles via the thermal decomposition of nickel organometallic precursor in alkylamines

Cited by 213 publications

References 26 publications

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

Synthesis of Ni nanoparticles with controllable magnetic properties by atmospheric pressure microplasma assisted process

Nickel Based Nano Particles as Adsorbents in Water Purification Methods - A Review

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