DC Arc discharge synthesized zirconia nanoparticles: shed light on arc current effects on size, crystal structure, optical properties and formation mechanism

Peymani, Reza; Poursalehi, Reza; Yourdkhani, Amin

doi:10.1088/2053-1591/ab123f

Cited by 5 publications

(2 citation statements)

References 98 publications

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“…Specifically, nanosized ZrO 2 has three types of crystal structure: monoclinic (M), tetragonal (T) and cubic Nanomaterials 2021, 11, 2162 2 of 14 (C) [23,24], in addition to being an N-type semiconductor. Moreover, nano-ZrO 2 exhibits surface and interface, quantum size, and macroscopic quantum tunneling effects [25]. Due to the small particle size, large specific surface area and incomplete coordination of atoms on the surface, there is an increase in the quantity of active sites on the nano-ZrO 2 surface [26].…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Raman Scattering Activity of ZrO2 Nanoparticles: Effect of Tetragonal and Monoclinic Phases

Deng

et al. 2021

Nanomaterials

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The effect of the ZrO2 crystal form on surface-enhanced Raman scattering (SERS) activity was studied. The ratio of the tetragonal (T) and monoclinic (M) phases of ZrO2 nanoparticles (ZrO2 NPs) was controlled by regulating the ratio of two types of additives in the hydrothermal synthesis method. The SERS intensity of 4-mercaptobenzoic acid (4–MBA) was gradually enhanced by changing the M and T phase ratio in ZrO2 NPs. The degree of charge transfer (CT) in the enhanced 4–MBA molecule was greater than 0.5, indicating that CT was the main contributor to SERS. The intensity of SERS was strongest when the ratio of the T crystal phase in ZrO2 was 99.7%, and the enhancement factor reached 2.21 × 104. More importantly, the proposed study indicated that the T and M phases of the ZrO2 NPs affected the SERS enhancement. This study provides a new approach for developing high-quality SERS substrates and improving the transmission efficiency of molecular sensors.

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Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Raman Scattering Activity of ZrO2 Nanoparticles: Effect of Tetragonal and Monoclinic Phases

Deng

et al. 2021

Nanomaterials

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“…Ag nanoparticles were synthesized by arc discharge in a solution such as H 2 O, ethanol (C 2 H 5 OH), and water mixed aqueous solution of polyvinyl pyrrolidone (PVP) with a corresponding average particle size of 8, 10, and 13 nm [ 8 , 9 ]. Spherical Zr nanoparticles are synthesized via electrical discharge with average size decreasing from 40 to 22 nm by increasing the current from 40 to 160 A [ 10 ]. Nickel (Ni) nanoparticles were synthesized by a pulse electrical discharge between two nickel electrodes in H 2 O with 1% PVA as the stabilizing agent [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

The Numerical and Experimental Investigation of Particle Size Distribution Produced by an Electrical Discharge Process

Lin

Liu

et al. 2021

Materials

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The vague influence of thermal action of electrical discharge on size distribution of metallic powders hinders the adjustability of powder quality. Due to the small gap, short discharge on-time, uncertain discharge point, and strong light interference, direct observation of preparation is difficult to carry out. Herein, the multi-physics coupling finite element method (FEM) was applied to numerically investigate the relationship between size distribution and thermal action. Through modeling of thermal transformation and heat distribution on the surface of electrode, temperature of the electrode is found to be decided by the latent heat and the distribution of heat point obeys the normal distribution, which corresponds with experimental results. Finally, the vapor film to droplet fragmentation theory was proposed to explain the phenomenon of normal distribution. The research results provide theoretical support for the preparation of metallic powder by electrical discharge, and also play a guiding role in optimizing the process parameters in the actual preparation process to tune the size distribution.

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The numerical research on the effect of ultrasonic field on metallic powders produced by the ultrasonic-assisted electrical discharge process

et al. 2022

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DC Arc discharge synthesized zirconia nanoparticles: shed light on arc current effects on size, crystal structure, optical properties and formation mechanism

Cited by 5 publications

References 98 publications

Surface-Enhanced Raman Scattering Activity of ZrO2 Nanoparticles: Effect of Tetragonal and Monoclinic Phases

Surface-Enhanced Raman Scattering Activity of ZrO2 Nanoparticles: Effect of Tetragonal and Monoclinic Phases

The Numerical and Experimental Investigation of Particle Size Distribution Produced by an Electrical Discharge Process

The numerical research on the effect of ultrasonic field on metallic powders produced by the ultrasonic-assisted electrical discharge process

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