Utilization of the microwave electric or magnetic field in the synthesis of monometallic and bimetallic nanoparticles

Sumi, Takuya; Dillert, Ralf; Horikoshi, Satoshi

doi:10.1039/c5ra00452g

Cited by 8 publications

(3 citation statements)

References 57 publications

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“…The TM 110 mode with the maximum magnetic field on the cylindrical center axis was used as the MW irradiation method. Although magnetic-field heating has been used in solid-phase syntheses or metal heating, − there are a few examples of chemical syntheses of solution systems using a magnetic-field-concentrated mode. − Therefore, the characteristics of solutions heated using the present apparatus were investigated for a conventional tubular-type reactor. Then, continuous syntheses of metal nanoparticles were conducted as chemical reaction examples in this SFprocess.…”

Section: Introductionmentioning

confidence: 99%

Sheet-Type Flow Process Using Magnetic-Field-Induced Heating with Single-Mode Microwaves Applied to a Continuous Metal Nanoparticle Synthesis

Miyakawa

Nakamura

Iwabuchi

et al. 2020

Ind. Eng. Chem. Res.

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We developed a sheet-type microwave (MW) flow process that uses a capillary phenomenon to retain a reaction solution between fabric fibers without using a conventional reaction tube. This process is applicable to various reactions that use highly viscous raw material solutions or raw material solutions that generate gas, which are difficult to handle in a conventional flow synthesis. Using this process, single and multiple sheets were transferred continuously similarly to a belt conveyor. Precise temperature control was achieved using MW heating with solidstate devices. For syntheses containing many salts or metal precursors, TM 110 single-mode MW with the magnetic field focused on the cylindrical center axis was suitable. Using this chemical reaction model with a highly viscous solution or involving gas evolution during reaction, continuous syntheses of silver, nickel, and copper nanoparticles were achieved.

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Section: Introductionmentioning

confidence: 99%

Sheet-Type Flow Process Using Magnetic-Field-Induced Heating with Single-Mode Microwaves Applied to a Continuous Metal Nanoparticle Synthesis

Miyakawa

Nakamura

Iwabuchi

et al. 2020

Ind. Eng. Chem. Res.

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“…On the other hand, microwave (MW) irradiation is one of the most sophisticated methods for the preparation of nanoparticles with controlled size and shape. − In the past decade, there has been increasing attention in the use of MW heating instead of conventional heating in various kinds of monometallic and bimetallic nanoparticle syntheses, − because MW heating has been shown to reduce dramatically the reaction times and to enhance the purity of the nanoparticles produced. For example, Bensebaa et al used MW heating to produce Pt/Ru bimetallic nanoparticles in ethylene glycol (EG) solution dissolving PVP and demonstrated that microwave preparation parameters are linked to surface composition and structure.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Polyol Synthesis of Pt/Pd and Pt/Rh Bimetallic Nanoparticles in Polymer Solutions Prepared by Batch and Continuous-Flow Processing

Cong

Nakayama

Maenosono

et al. 2017

Ind. Eng. Chem. Res.

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Colloidal dispersions of Pt/Pd and Pt/Rh bimetallic nanoparticles have been synthesized by a microwave-assisted polyol method using ethylene glycol and glycerol as a solvent in the presence of poly(N-vinyl-2-pyrrolidone) (PVP). The structure of bimetallic nanoparticles has been investigated by means of high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS) elemental mapping, and extended X-ray absorption fine structure (EXAFS). The effectiveness of the batch and continuous-flow processing was demonstrated for the preparation of various bimetallic nanoparticles under multimode or single-mode microwave irradiation. In the single-mode microwave-assisted continuous-flow processing in contrast to the batch processing, the well-dispersed colloidal bimetallic nanoparticles were successfully produced at the boiling temperature of solvent. EXAFS analysis indicated that, in the case of Pt/Pd (1/1) and Pt/Rh (1/1) bimetallic nanoparticles prepared using both batch and continuous-flow processing, the distribution of different metallic species in a particle tended to be a “cluster-in-cluster” structure.

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“…Interior and exterior of the materials are heated at the same time. And the materials are heated quickly and uniform [7][8][9]. In this work, we used microwave reactor to synthesis Ag/Cu bimetallic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of Ag/Cu Bimetallic Nanoparticles and Their Antibacterial Properties

Li¹,

Song

Zhou³

et al. 2016

Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)

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Abstract. Ag/Cu bimetallic nanoparticles were synthesised in a few minutes using 1-heptanol as reducing agent in a microwave reactor. The products of microwave heating and oil-bath heating were compared. Experimental results decide that, it is easier to obtain a higher degree of crystallization, smaller size distribution particles under microwave heating than oil-bath heating. And the products obtained by microwave heating method showed good antibacterial performance against Escherichia coli.

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Utilization of the microwave electric or magnetic field in the synthesis of monometallic and bimetallic nanoparticles

Cited by 8 publications

References 57 publications

Sheet-Type Flow Process Using Magnetic-Field-Induced Heating with Single-Mode Microwaves Applied to a Continuous Metal Nanoparticle Synthesis

Sheet-Type Flow Process Using Magnetic-Field-Induced Heating with Single-Mode Microwaves Applied to a Continuous Metal Nanoparticle Synthesis

Microwave-Assisted Polyol Synthesis of Pt/Pd and Pt/Rh Bimetallic Nanoparticles in Polymer Solutions Prepared by Batch and Continuous-Flow Processing

Microwave-Assisted Synthesis of Ag/Cu Bimetallic Nanoparticles and Their Antibacterial Properties

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