Formation of Non-Aggregated Nickel Nanoparticles for Catalysts by Gas-Phase Reaction

Okada, Yohji; Matsumoto, Shoki; Sawai, Riku; Kinoshita, Takuya

doi:10.1252/jcej.16we290

Cited by 3 publications

(7 citation statements)

References 7 publications

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“…All results indicate a crystalline nature of the as-prepared particles, revealed by distinctive diffraction peaks. The XRD pattern of the condition 1 exhibits three prominent peaks at 2h values of 44 …”

Section: Meanwhile As Shown In Supporting Informationmentioning

confidence: 99%

“…This technique combines the advantages of microreactors and the nonthermal plasma chemistry, resulting in a new and facile route for the gas phase fabrication of Ni nanoparticles. Compared to the existing methods (Table 2 [33][34][35][36][37][38][39][40][41][42][43][44][45] ), the present study chooses Ni(cp) 2 as the precursor to replace the commonly used Ni(CO) 4 which is extremely toxic and dangerous. 36 As a consequence, special safety precautions are not needed.…”

Section: Meanwhile As Shown In Supporting Informationmentioning

confidence: 99%

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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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Section: Meanwhile As Shown In Supporting Informationmentioning

confidence: 99%

Section: Meanwhile As Shown In Supporting Informationmentioning

confidence: 99%

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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“…Earlier, we successfully produced silica (SiO 2 ) microsphere-supported Ni nanoparticles, which did not undergo sintering, using our method based on the collision of Ni particles onto SiO 2 microspheres with soft surfaces at sufficiently high temperatures (Okada et al, 2017). We observed some dents on the surfaces of SiO 2 microspheres, which were generated during the collision.…”

Section: Introductionmentioning

confidence: 84%

“…The SiO 2 heating section temperature of 973 K was found to be sufficiently high to soften the surfaces of SiO 2 microspheres. As discussed in our previous report (Okada et al, 2017), we assumed that the dents on the surfaces of SiO 2 microspheres generated by collisions with Ni nanoparticles prevented the sintering of Ni nanoparticles. These dents…”

Section: Sintering Of Ni Nanoparticles On Sio 2 Microspheresmentioning

confidence: 91%

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Preparation of Nickel Nanoparticle-Deposited Silica Microsphere Catalysts

Okada

Matsumoto

Kinoshita

2019

J. Chem. Eng. Japan

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We prepared Ni nanoparticle-deposited silica (SiO 2 ) microspheres using a method based on the collision of Ni nanoparticles, which were generated by hydrogen reduction of NiCl 2 , with SiO 2 microspheres. SiO 2 microspheres were heated in a gas-phase reactor to a temperature su ciently high to soften their surfaces. Notably, when SiO 2 microspheres were heated to temperatures higher than 973 K before collision with Ni nanoparticles, the nanoparticles showed no signs of sintering on the SiO 2 microsphere surfaces during heat treatment at a high temperature of 1,073 K. In addition, we independently controlled the diameter and content of Ni nanoparticles on the SiO 2 microspheres by changing NiCl 2 evaporation temperature and NiCl 2 -carrier gas ow rate.

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One-Step Aerosol Synthesis of SiO₂-Coated FeNi Particles by Using Swirler Connector-Assisted Spray Pyrolysis

Septiani

Yamashita

Cao

et al. 2022

Ind. Eng. Chem. Res.

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Silica-coated soft magnetic particles are essential for some powder magnetic cores consisting of primary (coarse particles) and secondary (fine particles) soft magnetic particles in the advancement of electric devices. Herein, we report the first investigation on the direct synthesis of submicron-sized silica-coated FeNi (FeNi@SiO2) particles as the secondary particle using a connector-assisted spray pyrolysis route. Provided by computational fluid dynamics calculation in applying different connector types, i.e., T-shaped and swirler, we found that the mixing performance between FeNi and HMDSO vapor in the swirler connector played an important role in resulting heterogeneous nucleation, which is crucial for obtaining the higher coating ratio (CR) and fewer undesired nanoparticles than that of the T-shaped connector. The as-prepared submicron-sized FeNi@SiO2 particles (353 nm) with the highest CR (95.9%) demonstrated a remarkable DC bias characteristic (I sat) and eddy current loss values on a powder magnetic core, promising the practical application in manufacturing soft magnetic components.

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Formation of Non-Aggregated Nickel Nanoparticles for Catalysts by Gas-Phase Reaction

Cited by 3 publications

References 7 publications

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

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

Preparation of Nickel Nanoparticle-Deposited Silica Microsphere Catalysts

One-Step Aerosol Synthesis of SiO₂-Coated FeNi Particles by Using Swirler Connector-Assisted Spray Pyrolysis

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Formation of Non-Aggregated Nickel Nanoparticles for Catalysts by Gas-Phase Reaction

Cited by 3 publications

References 7 publications

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

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

Preparation of Nickel Nanoparticle-Deposited Silica Microsphere Catalysts

One-Step Aerosol Synthesis of SiO2-Coated FeNi Particles by Using Swirler Connector-Assisted Spray Pyrolysis

Contact Info

Product

Resources

About

One-Step Aerosol Synthesis of SiO₂-Coated FeNi Particles by Using Swirler Connector-Assisted Spray Pyrolysis