A novel method to prepare copper microspheres via chemical reduction route

Logutenko, O. A.; Titkov, A. I.; Vorobyov, A.M.; Lyakhov, N. Z.

doi:10.1016/j.jmrt.2021.05.046

Cited by 9 publications

(3 citation statements)

References 58 publications

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“…[4] High-temperature applications are usually excluded due to high sensitivity and susceptibility towards oxidation (the same being a cause for worry even in atmospheric temperatures and ambient). Researchers have employed numerous methods like chemical reduction, [5] sol-gel, [6] photochemical, [7] microwave, [8] reverse micelles, [9] microemulsion, [10] hydrothermal [11] and electrochemical [12] to synthesize and stabilize Cu particles. In the case of different oxides of Cu like Cu 2 O, CuO dampens the localized surface plasmon resonance (LSPR) [13] intensity of the metal core (Cu) with an associated increase in band gap and hole mobilities.…”

Section: Introductionmentioning

confidence: 99%

Oxidative and Colloidal Kinetics of Size‐Controlled Copper Structures through Surface Plasmon‐Regulated Examinations for Broadband Absorbance

Indhu,

Dharmalingam

2024

ChemistrySelect

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Out of all the candidate plasmonic metals, copper has noteworthy optical characteristics and is also economically favourable for use. However, the stability of plasmonic copper nanomaterials against the loss of the plasmonic property is a setback. The present work is on the synthesis of oxidation‐stable copper micro/nanoparticles (CuMps/NPs) at ambient conditions with chosen precursors, antioxidizing agents, polymeric capping agents and chelating ligands. The Surface Plasmon Resonance (SPR) response of the synthesized Cu structures and their morphological analyses are studied. XRD data revealed changes in crystal structure such as crystallite sizes, lattice distortions and dislocation densities as a result of variations in the synthesis conditions. We present from these analyses micro/nanostructures of oxidation‐stable plasmonic Cu. The validation of the aggregation and oxidation stabilities of the different synthesized samples make them a worthy choice for multiple plasmonic applications, along with showing the synthesis protocols as viable approaches for achieving such structures with a markedly increased shelf life.

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Section: Introductionmentioning

confidence: 99%

Oxidative and Colloidal Kinetics of Size‐Controlled Copper Structures through Surface Plasmon‐Regulated Examinations for Broadband Absorbance

Indhu,

Dharmalingam

2024

ChemistrySelect

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“…Among these methods, chemical reduction, including liquid and gas-phase reduction, is a promising method owing to its convenient route and controllable process parameters. The liquid-phase reduction methods for obtaining ultrafine copper powder are based on the reduction of copper ions by reducing agents in the solution [12]. However, this approach is difficult to practically use because of its high cost, poor reaction ability, toxic and dangerous reductants (e.g., hydrazine and methanal), and the great deal of wastewater it involves [13,14].…”

Section: Introductionmentioning

confidence: 99%

The Preparation of an Ultrafine Copper Powder by the Hydrogen Reduction of an Ultrafine Copper Oxide Powder and Reduction Kinetics

Li,

Pang,

Han

et al. 2024

Materials

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Ultrafine copper powders were prepared by the air-jet milling of copper oxide (CuO) powders and a subsequent hydrogen (H2) reduction. After milling, the particle size and grain size of CuO powders decreased, while the specific surface area and structural microstrain increased, thereby improving the reaction activity. In a pure H2 atmosphere, the process of CuO reduction was conducted in one step, and followed a pseudo-first-order kinetics model. The smaller CuO powders after milling exhibited higher reduction rates and lower activation energies compared with those without milling. Based on the unreacted shrinking core model, the reduction of CuO powders via H2 was controlled by the interface reaction at the early stage, whereas the latter was limited by the diffusion of H2 through the solid product layer. Additionally, the scanning electron microscopy (SEM) indicated that copper powders after H2 reduction presented a spherical-like shape, and the sintering and agglomeration between particles occurred after 300 °C, which led to a moderate increase in particle size. The preparing parameters (at 400 °C for 180 min) were preferred to obtain ultrafine copper powders with an average particle size in the range of 5.43–6.72 μm and an oxygen content of less than 0.2 wt.%.

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“…High-temperature applications are usually excluded due to high sensitivity and susceptibility towards oxidation (the same being a cause for worry even in atmospheric temperatures and ambient). Researchers have employed numerous methods like chemical reduction [5], sol-gel [6], photochemical [7], microwave [8], reverse micelles [9], microemulsion [10], hydrothermal [11] and electrochemical [12] to synthesize and stabilize Cu particles. In the case of different oxides of Cu like Cu2O, CuO dampens the localized surface plasmon resonance (LSPR) [13] intensity of the metal core (Cu) with an associated increase in band gap and hole mobilities.…”

Section: Introductionmentioning

confidence: 99%

Oxidative and colloidal kinetics of size controlled copper structures through surface plasmon regulated examinations for broadband absorbance

Indhu,

Dharmalingam

2023

Preprint

View full text Add to dashboard Cite

Out of all the candidate plasmonic metals, copper has noteworthy optical characteristics and is also economically favourable for use. However, the stability of plasmonic copper nanomaterials against the loss of the plasmonic property is a setback. The present work is on the synthesis of oxidation-stable copper micro/nanoparticles (CuMps/NPs) at ambient conditions with chosen precursors, antioxidizing agents, polymeric capping agents and chelating ligands. The Surface Plasmon Response (SPR) response of the synthesized Cu structures and their morphological analyses are studied. The refined XRD data were subjected to a detailed structural investigation over fundamental aspects such as crystallite sizes, distortion and dislocation densities. We present herein micro/nanostructures of oxidation-stable plasmonic Cu. The validation of the aggregation and oxidation stabilities of the different synthesized samples make them a worthy choice for multiple plasmonic applications, along with showing the synthesis protocols as viable approaches for achieving such structures with a markedly increased shelf life.

show abstract

A novel method to prepare copper microspheres via chemical reduction route

Cited by 9 publications

References 58 publications

Oxidative and Colloidal Kinetics of Size‐Controlled Copper Structures through Surface Plasmon‐Regulated Examinations for Broadband Absorbance

Oxidative and Colloidal Kinetics of Size‐Controlled Copper Structures through Surface Plasmon‐Regulated Examinations for Broadband Absorbance

The Preparation of an Ultrafine Copper Powder by the Hydrogen Reduction of an Ultrafine Copper Oxide Powder and Reduction Kinetics

Oxidative and colloidal kinetics of size controlled copper structures through surface plasmon regulated examinations for broadband absorbance

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