Studies on morphology changes of copper sulfide nanoparticles in a continuous Couette-Taylor reactor

Tang, Zengmin; Kim, Woo‐Sik; Yu, Taekyung

doi:10.1016/j.cej.2018.11.034

Cited by 13 publications

(10 citation statements)

References 36 publications

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“…Combining Equations (8) and (9) with Equation 10, the concentration of iodine (I 2 ) can be calculated from Equation (11).…”

Section: Reaction Kineticsmentioning

confidence: 99%

“…They attempted to introduce an enhancement factor correlated with the mass transfer rate to characterize this type of behavior, and suggested that the particle shape change depends on this enhancement factor. Tang et al 8 have investigated the morphology change of copper sulfide nanoparticles by using the TC reactor and found that an intensified mass transfer rate can be achieved using such reactor. By tracing the other applications, Kim and his co‐researchers have employed the TC reactor to synthesize many types of fine particles, such as cathode precursors for lithium ion batteries, 9,10,11 barium sulfate, 12 L‐histidine, 13 and Guanosine 5‐monophosphate 14 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of hydrodynamic heterogeneity on micromixing intensification in a Taylor–Couette flow reactor with variable configurations of inner cylinder

Liu

Yang

et al. 2021

AIChE Journal

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Effect of hydrodynamic heterogeneity on micromixing intensification in a Taylor-Couette flow (TC) reactor with variable configurations of inner cylinder has been investigated by adoption of a parallel competing iodide-iodate reaction system. Two types of inner cylinder, circular inner cylinder and lobed inner cylinder (CTC and LTC), were used to generate hydrodynamic heterogeneity, focusing on the effects of the Reynolds number, the acid concentration, and the feeding time on the micromixing performance. Segregation index (Xs) was employed to evaluate the micromixing efficiency. It is revealed that Xs decreases with the increase of Reynolds number and feeding time but increases with the increase of acid concentration for both the CTC and LTC. However, the LTC does present a better micromixing performance at various operating conditions than that of the CTC as affirmed by both the experimental and computational fluid dynamics simulation results.

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“…Combining Equations (8) and (9) with Equation 10, the concentration of iodine (I 2 ) can be calculated from Equation (11).…”

Section: Reaction Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of hydrodynamic heterogeneity on micromixing intensification in a Taylor–Couette flow reactor with variable configurations of inner cylinder

Liu

Yang

et al. 2021

AIChE Journal

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“…Thus, Jung et al achieved the high-throughput synthesis of luminescent quantum dots using a continuous CT reactor, and the production yield was as high as 22,560 kg day –1 m –3 . We also reported that the morphology of copper sulfide nanoparticles could be finely adjusted by rotation speed, mean residence time (MRT), and feed concentration in a continuous CT reactor . Therefore, the morphology of copper sulfide nanoparticles in a CT reactor changed from fiber to hexagonal plates by increasing the rotational speeds, while only nanofibers were produced in a CSTR.…”

Section: Introductionmentioning

confidence: 99%

“…We also reported that the morphology of copper sulfide nanoparticles could be finely adjusted by rotation speed, mean residence time (MRT), and feed concentration in a continuous CT reactor. 41 Therefore, the morphology of copper sulfide nanoparticles in a CT reactor changed from fiber to hexagonal plates by increasing the rotational speeds, while only nanofibers were produced in a CSTR. TVF in a CT reactor could also effectively exfoliate layered materials such as graphene and molybdenum disulfide.…”

Section: ■ Introductionmentioning

confidence: 99%

Effective Dispersion of CuPd Alloy Nanoparticles Using the Taylor Vortex Flow for the Preparation of Catalysts with Relatively Clean Surfaces

Jiang

Kim

2022

ACS Appl. Nano Mater.

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Dispersion is a crucial issue in nanoparticle preparation, e.g., a nanocatalyst of a high surface−volume ratio. Unfortunately, most synthetic approaches strongly depend on an excessive amount of stabilizers and inactive supporting materials for nanoparticle dispersion, resulting in a serious loss of the active surface. In this research, an approach employing a Taylor vortex flow (TVF) is first reported to obtain the effective dispersion of nanoparticles in the synthesis. Completely dispersed nanoparticles of the CuPd alloy less than 5 nm were easily synthesized in a continuous Couette−Taylor (CT) reactor due to the strong and periodic shear field of TVF. Thus, 3.2 nm sized nanoparticles were synthesized at a rotation speed of 1200 rpm and a mean residence time of 2 min despite the use of at least 6−14 times less stabilizer compared with conventional synthetic approaches. However, large aggregates of nanoparticles are always produced in a conventional continuous stirring tank reactor (CSTR) even with a high concentration of stabilizer and a high agitation speed of 3000 rpm. Furthermore, we systematically examined the effect of various synthetic parameters such as rotating speeds, mean residence times, and concentrations of reagents and stabilizers on the dispersion and size of CuPd alloy nanoparticles. Moreover, the well-dispersed CuPd alloy nanoparticles prepared in the CT reactor exhibited enhanced electrocatalytic activity for formic acid oxidation (FAO) compared with CuPd aggregates prepared in CSTR.

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“…They attempted to introduce an enhancement factor in order to characterise this type of behaviour, which is related to the mass transfer rate and suggested that the particle shape change is dependent on this enhancement factor. Tang et al (2019) have investigated the morphology change of copper sulfide nanoparticles by using the TC reactor and they have also found that an intensified mass transfer rate can be achieved using the TC reactor. By tracing the other applications, Haut et al (2003) employed a TC device to culture animal cells and found that the device is more appropriate than a conventional stirred tank in terms of the control of oxygen content and cell suspension.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrodynamic Heterogeneity on Micromixing in a Taylor-Couette Flow Reactor with Lobed Inner Cylinder

Liu

Yang

et al. 2020

Preprint

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Effect of hydrodynamic heterogeneity on micromixing intensification in a Taylor-Couette flow reactor (TC) with variable configurations of inner cylinder has been investigated by adoption of a parallel competing iodide-iodate reaction system. Two types of inner cylinder, circular inner cylinder and lobed inner cylinder (CTC and LTC), were used to generate hydrodynamic hydrodynamic heterogeneity for comparison of the micromixing intensification, focusing on the effects of the Reynolds number of the TC reactor, the acid concentration, and the feeding time. The Segregation index (Xs) was employed to evaluate the micromixing efficiency. It was revealed that Xs decreases with the increase of Reynolds number and feeding time but increases with the increase of acid concentration for both the CTC and LTC. However, the LTC does present a better micromixing performance at various operating conditions than that of the CTC as affirmed by both the experimental and computational fluid dynamics (CFD) simulation results.

show abstract

Studies on morphology changes of copper sulfide nanoparticles in a continuous Couette-Taylor reactor

Cited by 13 publications

References 36 publications

Effect of hydrodynamic heterogeneity on micromixing intensification in a Taylor–Couette flow reactor with variable configurations of inner cylinder

Effect of hydrodynamic heterogeneity on micromixing intensification in a Taylor–Couette flow reactor with variable configurations of inner cylinder

Effective Dispersion of CuPd Alloy Nanoparticles Using the Taylor Vortex Flow for the Preparation of Catalysts with Relatively Clean Surfaces

Effect of Hydrodynamic Heterogeneity on Micromixing in a Taylor-Couette Flow Reactor with Lobed Inner Cylinder

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