Growth Mechanism and Application of Nanostructures Fabricated by a Copper Sulfate Solution Containing Boric Acid

Lee, Jae Min; Jung, Kyung Kuk; Ko, Jong Soo

doi:10.1149/2.0691608jes

Cited by 16 publications

(5 citation statements)

References 32 publications

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“…As can be observed from Figure 3, the potential of cathodic reactions shifts to the more negative values when boric acid is added to the electrodeposition bath. This potential reduction in the onset of the electrodeposition reactions can be explained by the capping and crystal growth modifying behavior of boric acid [59]. Essentially, boric acid molecules initially act as a buffering agent by attracting OH − ions that formed near the substrate and result in H 2 evolution.…”

Section: Resultsmentioning

confidence: 99%

Recycled Cobalt from Spent Li-ion Batteries as a Superhydrophobic Coating for Corrosion Protection of Plain Carbon Steel

et al. 2018

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A new recycling and film formation scheme is developed for spent Li-ion batteries, which involves the combination of ascorbic-assisted sulfuric leaching and electrodeposition to fabricate a corrosion resistance superhydrophobic coating. The idea behind the simultaneous use of sulfuric and ascorbic is to benefit from the double effect of ascorbic acid, as a leaching reducing agent and as morphological modifier during electrodeposition. Quantum chemical calculations based on the density functional theory are performed to explain the cobalt-ascorbate complexation during the electrocristalization. The optimum parameters for the leaching step are directly utilized in the preparation of an electrolyte for the electrodeposition process, to fabricate a superhydrophobic film with a contact angle of >150° on plain carbon steel. The potentiodynamic polarization measurments in 3.5 wt % NaCl showed that boric-pulsed electrodeposited cobalt film has 20-times lower corrosion current density and higher corrosion potential than those on the non-coated substrate.

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Section: Resultsmentioning

confidence: 99%

Recycled Cobalt from Spent Li-ion Batteries as a Superhydrophobic Coating for Corrosion Protection of Plain Carbon Steel

et al. 2018

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“…1 (reduction of Cu 2+ ions) and Eq. 2 (reduction of Cu + ions) [11,19]. Figure 1b shows the shape of the electrodeposited structure formed when the solution was stirred at 200 rpm during the electrodeposition.…”

Section: Results Of Cu Alloy Electrodeposition On Non-patterned Substmentioning

confidence: 99%

“…Using this electrodeposition method, the time and cost required for the fabrication of metallic microstructures can be significantly reduced. Moreover, electrodeposition methods allow the formation of various shapes of the metal alloy structure by controlling simple variables such as the stirring rate, temperature, and applied current density [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Representative materials for producing a metallic microstructure through an electrodeposition technique include Cu, Au, Ni, Ag, and Sn [11][12][13][14][15][16]. Among them, Cu and Cu alloys are excellent engineering materials, and have significant advantages including a low chemical reactivity, low cost, high electrical conductivity, and good thermal conductivity [12,17].…”

Section: Introductionmentioning

confidence: 99%

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Effects of a micro pattern on Cu alloy electrodeposition and its application as an oil detector

Lee

2016

Micro and Nano Syst Lett

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In this study, the effects of open area ratio (OAR) variations by micro-patterns on Cu alloy electrodeposition were analyzed experimentally. To change the OAR of the samples, a strip-type micro-pattern was formed on a substrate through a photolithography process. Moreover, the OAR was controlled by adjusting the distance of the stripe pattern to a width of 20 μm. When electrodeposition was applied on a non-patterned substrate with an OAR of 100%, a pillar-type Cu alloy structure was produced. In addition, when the OAR was decreased to 40%, the height of the Cu alloy structures was increased. However, when the OAR was decreased to 20%, no electrodeposited structures were formed. To confirm the industrial effectiveness of the electrodeposited structures on a micro-pattern, the Cu alloy electrodeposited structures were applied to the formation of an oil detector.

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“…19,20 Controlling the Cu 2 O surface morphology and particle sizes allows one to decrease the Cu 2 O photoproduction electron-hole recombination rate and thus improve its photoelectric properties. In the electrochemical deposition process, the deposition potential, 21 solution composition, 22,23 and pH 24 influence the surface morphology and particle sizes of Cu 2 O. Many researchers have focused on varying the electrochemical deposition parameters to control the surface morphology and particle sizes of Cu 2 O.…”

mentioning

confidence: 99%

Nucleation Mechanism and Optoelectronic Properties of Cu₂O onto ITO Electrode in the Electrochemical Deposition Process

Tang

et al. 2017

J. Electrochem. Soc.

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Cyclic voltammetry and chronoamperometry were used to study the deposition process at the initial stage of Cu 2 O electrodeposition on indium tin oxide-coated glass. The current transient data and predicted values were analyzed by the instantaneous and progressive nucleation models under different electrolyte concentrations. The effects of the Cu 2 O nucleation mechanism on microstructure and photoelectric properties of Cu 2 O were investigated by X-ray photoelectron spectroscopy, X-ray diffractometry, scanning electron microscopy, ultraviolet visible spectrophotometry and fluorescence spectrophotometry. The results show that the electrochemical deposition process of Cu 2 O is irreversible and controlled by diffusion, and the diffusion coefficient was calculated to be 2.2 × 10 −6 cm 2 · s −1 . The nucleation mechanism of Cu 2 O is related to the electrolyte concentration. When the concentrations of Cu(AC) 2 were 5 mM and 15 mM, the nucleation processes of Cu 2 O were consistent with the progressive nucleation and instantaneous nucleation models, respectively. Under the instantaneous nucleation mechanism, the prepared Cu 2 O displayed a uniform structure, composed of sword-shaped dendritic crystal. Compared to the progressive nucleation, the purity of the Cu 2 O was higher, the bandgap narrower (2.006 eV), and the photoluminescence intensity higher. The Cu 2 O had a high carrier density (4.9 × 10 22 cm −3 ) and a low charge transfer resistance (127.27 K · cm 2 ). It exhibits superior photoelectric performance. The forbidden bandgap of cuprous oxide (Cu 2 O) is 1.9-2.5 eV. Due to its advantages in abundance, low cost, and nontoxicity, it satisfies the necessary economy and environmental requirements to be a viable material for solar energy conversion. In addition, the position of the conduction band (more negative than −0.7 V vs RHE) provides a large driving force for proton reduction in photoelectric cells. 16 Among these techniques, electrodeposition has the attractive features of low processing temperature and low instrumentation cost, making it the most common method for the fabrication of Cu 2 O thin films.Since the photoelectric conversion efficiency of Cu 2 O can reach 20% in theory, many scholars have explored the possibility of its application in photovoltaic conversion. However, the current highest photoelectric conversion efficiency is only 5.38%, 17,18 due to the high recombination rate of photoproduction electron holes. Due to its electronic structure, the bonding, surface energy, and chemical reactivity of Cu 2 O have a direct relationship with its surface morphology and grain sizes. 19,20 Controlling the Cu 2 O surface morphology and particle sizes allows one to decrease the Cu 2 O photoproduction electron-hole recombination rate and thus improve its photoelectric properties. In the electrochemical deposition process, the deposition potential, 21 solution composition, 22,23 and pH 24 influence the surface morphology and particle sizes of Cu 2 O. Many researchers have focused on varying the electroch...

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Growth Mechanism and Application of Nanostructures Fabricated by a Copper Sulfate Solution Containing Boric Acid

Cited by 16 publications

References 32 publications

Recycled Cobalt from Spent Li-ion Batteries as a Superhydrophobic Coating for Corrosion Protection of Plain Carbon Steel

Recycled Cobalt from Spent Li-ion Batteries as a Superhydrophobic Coating for Corrosion Protection of Plain Carbon Steel

Effects of a micro pattern on Cu alloy electrodeposition and its application as an oil detector

Nucleation Mechanism and Optoelectronic Properties of Cu₂O onto ITO Electrode in the Electrochemical Deposition Process

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Growth Mechanism and Application of Nanostructures Fabricated by a Copper Sulfate Solution Containing Boric Acid

Cited by 16 publications

References 32 publications

Recycled Cobalt from Spent Li-ion Batteries as a Superhydrophobic Coating for Corrosion Protection of Plain Carbon Steel

Recycled Cobalt from Spent Li-ion Batteries as a Superhydrophobic Coating for Corrosion Protection of Plain Carbon Steel

Effects of a micro pattern on Cu alloy electrodeposition and its application as an oil detector

Nucleation Mechanism and Optoelectronic Properties of Cu2O onto ITO Electrode in the Electrochemical Deposition Process

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Product

Resources

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Nucleation Mechanism and Optoelectronic Properties of Cu₂O onto ITO Electrode in the Electrochemical Deposition Process