Synthesis of nickel nanoparticles by aqueous reduction in continuous flow microreactor

Xu, Lei; Srinivasakannan, C.; Peng, Jinhui; Zhang, Di; Chen, Guo

doi:10.1016/j.cep.2015.04.010

Cited by 46 publications

(20 citation statements)

References 32 publications

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“…As an important class of ferromagnetic transition metal, Ni nanoparticles are emerging and displaying many characteristics such as high magnetism, high surface area, large surface energy, excellent chemical stability, low melting point, resource-rich, and low cost [ 10 – 12 ]. They are widely used in several important technological fields such as magnetic materials catalysts, magnetic fluids, microwave devices, and high-sensitive gas sensors [ 13 – 15 ]. Specifically, metal Ni nanoparticles as an important conducting and magnetic-anisotropy material have attracted wide significant interest because of their intriguing electronic and magnetic properties under magnetic fields [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Surfactant-assisted solvothermal synthesis of pure nickel submicron spheres with microwave-absorbing properties

Chen

Yang

et al. 2016

Nanoscale Res Lett

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Pure metallic nickel submicron spheres (Ni-SSs), flower-like nickel nanoflakes, and hollow micrometer-sized nickel spheres/tubes were controllably synthesized by a facile and efficient one-step solvothermal method with no reducing agent. The characteristics of these nickel nanostructures include morphology, structure, and purification. Possible synthesis mechanisms were discussed in detail. The resultant Ni-SSs had a wide diameter distribution of 200~800 nm through the aggregation of small nickel nanocrystals. The ferromagnetic behaviors of Ni-SSs investigated at room temperature showed high coercivity values. Furthermore, the microwave absorption properties of magnetic Ni-SSs were studied in the frequency range of 0.5-18.0 GHz. The minimum reflection loss reached −17.9 dB at 17.8 GHz with a thin absorption thickness of 1.2 mm, suggesting that the submicron spherical structures could exhibit excellent microwave absorption properties. More importantly, this one-pot synthesize route provides a universal and convenient way for preparation of larger scale pure Ni-SSs, showing excellent microwave absorption properties.

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Section: Introductionmentioning

confidence: 99%

Surfactant-assisted solvothermal synthesis of pure nickel submicron spheres with microwave-absorbing properties

Chen

Yang

et al. 2016

Nanoscale Res Lett

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“…Most metal nanocrystals are synthesized from the reaction of metal precursor solution and reducing agents, such as NaBH 4 , sodium citrate, and N 2 H 4 . At present, a variety of microreactors, such as tubular reactors,119a,120 coaxial reactors, and chip reactors have been used to synthesize different kinds of metal nanoparticles, including Au, Ag, Co, Pt, Cu, Ni, etc. In these reactions, initial nucleation is rapid, which cost only milliseconds; therefore, rapid mixing and mass transfer of reactant are highly required for narrowing the particle size distribution.…”

Section: Applications Of Flow Chemistry Technologies For Different Namentioning

confidence: 99%

“…In these reactions, initial nucleation is rapid, which cost only milliseconds; therefore, rapid mixing and mass transfer of reactant are highly required for narrowing the particle size distribution. Many kinds of micromixers, such as T‐127a,129 and Y‐junctions as well as more complicated ones, such as the X‐mixer with multi cross‐channels reported by Baumgard et al118a and the pinched tubes developed by Kim et al,36b have been applied to enhance mixing in the synthesis of metal nanocrystals. Figure a shows a cyclone micromixer reported by Grunwaldt et al for generating ultrasmall Au, Pd, and Au‐Pd alloy nanoparticles within 2 ms mixing time 115a.…”

Section: Applications Of Flow Chemistry Technologies For Different Namentioning

confidence: 99%

“…Even using toxic CO as the gas phase, the microreactor still exhibited well reaction performance. Instead of directly pumping the gas phase, Zeng et al used evaporation of ethanol to produce a gas–liquid split stream to form Ni nanoparticles 127b. In addition to implementing fast reactant mixing, the large surface areas of microreactors are also useful in the syntheses of nanoparticles.…”

Section: Applications Of Flow Chemistry Technologies For Different Namentioning

confidence: 99%

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Continuous Synthesis of Nanocrystals via Flow Chemistry Technology

Sui

Yan

Liu

et al. 2019

Small

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Modern nanotechnologies bring humanity to a new age, and advanced methods for preparing functional nanocrystals are cornerstones. A considerable variety of nanomaterials has been created over the past decades, but few were prepared on the macro scale, even fewer making it to the stage of industrial production. The gap between academic research and engineering production is expected to be filled by flow chemistry technology, which relies on microreactors. Microreaction devices and technologies for synthesizing different kinds of nanocrystals are discussed from an engineering point of view. The advantages of microreactors, the important features of flow chemistry systems, and methods to apply them in the syntheses of salt, oxide, metal, alloy, and quantum dot nanomaterials are summarized. To further exhibit the scaling‐up of nanocrystal synthesis, recent reports on using microreactors with gram per hour and larger production rates are highlighted. Finally, an industrial example for preparing 10 tons of CaCO3 nanoparticles per day is introduced, which shows the great potential for flow chemistry processes to transfer lab research to industry.

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“…The continuous flow microreactor is a small reaction system with internal channel sizes ranging from tens to hundreds of microns. [13] Since it has a short reaction time, low manufacturing cost, high specific surface area for material contact, and high efficient mixed mass transfer, [14] this microreactor has been developing rapidly in chemical engineering, [15,16] the pharmaceutical industry, [14,17] material manufacturing, [18] and other fields. In the traditional organic synthesis of ethyl methyl oxalate, [19] a kettle reactor or tank was generally used, which restricted the mixing and mass transfer of raw materials and had high energy consumption, high safety risk, and low synthesis efficiency.…”

Section: Introductionmentioning

confidence: 99%

Microreactor technology for synthesis of ethyl methyl oxalate from diethyl oxalate with methanol and its kinectics

Ding

Zhong

2020

Can J Chem Eng

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This study focused on the performances and kinetics of the transesterification reaction of diethyl oxalate with methanol to prepare ethyl methyl oxalate via microreactor technology. The conversion of 79.8% of diethyl oxalate (DEO) and the selectivity of 65.9% of ethyl methyl oxalate (EMO) was obtained under the following optimized conditions: the mole ratio of methanol to diethyl oxalate was 3.3:1, the temperature was 35 C, the K 2 CO 3 catalyst concentration was 15 mg/mL, and the residence time was 2.30 minutes. In the temperature range of 25 C to 38 C, the simplified dynamic model was found to obtain the reaction order (α = 2.30), frequency factor (k 0 = 2.377 × 10 5), and apparent activation energy (E = 31.86 kJ/mol). The macroscopic dynamic equation was derived from the experimental result of the transesterification reaction of two feedstocks, which can be obtained through a series of calculations.

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Synthesis of nickel nanoparticles by aqueous reduction in continuous flow microreactor

Cited by 46 publications

References 32 publications

Surfactant-assisted solvothermal synthesis of pure nickel submicron spheres with microwave-absorbing properties

Surfactant-assisted solvothermal synthesis of pure nickel submicron spheres with microwave-absorbing properties

Continuous Synthesis of Nanocrystals via Flow Chemistry Technology

Microreactor technology for synthesis of ethyl methyl oxalate from diethyl oxalate with methanol and its kinectics

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