Effects of introduced electrolytes on galvanic deposition of ZnO films

Wang, Lida; Liu, Guichang; Xue, Dongfeng

doi:10.1016/j.electacta.2010.05.088

Cited by 18 publications

(4 citation statements)

References 55 publications

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“…To date, ZnO and other nanostructured materials have been assembled and studied by various methods and means [ 19 – 22 ], including magnetron sputtering [ 23 ], chemical vapor deposition [ 24 ], hydrothermal process [ 25 ], electrochemical deposition [ 26 – 28 ], electroless deposition [ 29 , 30 ], and other combination of methods [ 31 ]. Among all these techniques, electroless deposition presents several advantages such as low cost, large-scale deposition, and low-temperature processing.…”

Section: Introductionmentioning

confidence: 99%

A Facile Self-assembly Synthesis of Hexagonal ZnO Nanosheet Films and Their Photoelectrochemical Properties

et al. 2015

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Here, large-scale and uniform hexagonal zinc oxide (ZnO) nanosheet films were deposited onto indium tin oxide (ITO)-coated transparent conducting glass substrates via a facile galvanic displacement deposition process. Compared with other commonly used solution methods, this process avoids high temperature and electric power as well as supporting agents to make it simple and cost-effective. The as-fabricated ZnO nanosheet films have uniform hexagonal wurtzite structure. The photoelectrochemical (PEC) cell based on ZnO nanosheet film/ITO photoelectrode was also fabricated and its performance was improved by optimizing the solution concentration. A higher photocurrent density of ~500 μA cm−2 under AM 1.5 G simulated illumination of 100 mW cm−2 with zero bias potential (vs. Ag/AgCl electrode) was obtained, which may ascribe to the increased surface-to-volume ratio of disordered ZnO nanosheet arrays. Our developed method may be used to deposit other oxide semiconductors, and the ZnO nanosheet film/ITO PEC cell can be used to design low-cost optoelectronic and photoelectrochemical devices.

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Section: Introductionmentioning

confidence: 99%

A Facile Self-assembly Synthesis of Hexagonal ZnO Nanosheet Films and Their Photoelectrochemical Properties

et al. 2015

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“…It is well-known that the deposition of corrosion products on the magnesium surface changes its surface and can significantly affect the electrochemical behavior at the metal-electrolyte interface 21 . Depending on the species present in the electrolyte, corrosion products can be metal-oxide semiconductors [22][23][24] , insulating films of metal salts 25,26 , porous layers 27,28 , or dense layers 29 . When corrosion products form impervious and tenacious layers on the anode surface, the corrosion rate will be considerably reduced [1][2][3] .…”

Section: Electrode Deformationmentioning

confidence: 99%

Three-dimensional modeling of in-ground cathodic protection systems with deforming anodes

Mansouri¹,

Binali²,

Khan³

et al. 2021

Sci Rep

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The design of sacrificial cathodic protection (CP) systems conventionally involves steady-state assumptions, which means design parameters are considered constant during the in-service life of CP systems. In contrast, it is evident by experimental observations (including field measurements) that cathodic protection is a transient process due to variations in electrolyte properties such as seasonal changes in electrical conductivity of soil, depletion of anodes, and formation of corrosion deposits on anode material surface, to name a few. The lack of practical time-dependent models on this critical issue is apparent in the literature; accordingly, in this study, a pseudo transient electrochemical model is adopted to highlight the transient behavior of cathodic protection systems and investigate key differences with steady-state behavior. For the sake of demonstration, the developed model is used to simulate the time-dependent performance of a sacrificial anode bed for cathodic protection of screw-pile foundations. The methodology proposed in this study can be used by corrosion engineers to improve and optimize the design of CP systems and numerically estimate the performance of sacrificial anodes and the level of protection over time.

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“…The findings show that the corrosion deposits have different properties and depend on the species present in the medium. The corrosion deposits can be metal oxides, [1][2][3] metal salts, 4,5 porous layers, 6,7 or dense layers. 8 The deposits may be impervious/tenacious or porous.…”

Section: Introductionmentioning

confidence: 99%

Corrosion deposition in deforming anodes of in-ground cathodic protection systems: A three-dimensional transient study

Shirshahi,

Mansouri,

Taheri

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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Cathodic protection as a complementary technique is widely considered in the industry along with the selection of suitable materials as well as efficient coating considerations. In cathodic protection (CP), anode produces a current output to protect the structure (cathode) and part of the current output is wasted by the grounding system. We developed a 3D, and time-dependent numerical model to simulate the anode corrosion (using arbitrary Lagrangian-Eulerian method), find the deposit formation (by interface tracking level set method), anode mass loss and current wasted by the grounding system. We also defined a CP efficiency as anode mass loss times the current percentage received by the structure. The CP efficiency can be utilized for anode quantity and placement pattern. The results showed when the conductivity of corrosion products (deposit) is lower than that of soil, the current output from the anode decreases over time. When the deposit conductivity is higher than that of soil, the current output from the anode increases in time, reaches a peak, then decreases. This is due to the competition among three factors: anode surface increase, medium conductivity change, and inhibition effect of the deposition layer. For the studied case, almost 54% of the current from the anode is wasted by the grounding system. To illustrate the significance of CP efficiency, this study compares three alternative anode configurations with the original design. It is observed that for a 14.5 kg anode, burying the anodes 2 m deeper enhances the mean potential distribution on the structure by 4%. Additionally, the configuration featuring the 7.7 kg anode, owing to its superior dimensional design, demonstrates improved performance compared to other configurations.

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Effects of introduced electrolytes on galvanic deposition of ZnO films

Cited by 18 publications

References 55 publications

A Facile Self-assembly Synthesis of Hexagonal ZnO Nanosheet Films and Their Photoelectrochemical Properties

A Facile Self-assembly Synthesis of Hexagonal ZnO Nanosheet Films and Their Photoelectrochemical Properties

Three-dimensional modeling of in-ground cathodic protection systems with deforming anodes

Corrosion deposition in deforming anodes of in-ground cathodic protection systems: A three-dimensional transient study

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