Nucleation effect and growth mechanism of ZnO nanostructures by electrodeposition from aqueous zinc nitrate baths

Sun, Sujuan; Jiao, Shujie; Zhang, Kejun; Wang, Dongbo; Gao, Shiyong; Li, Hongtao; Wang, Jinzhong; Yu, Qingjiang; Guo, Fengyun; Zhao, Liancheng

doi:10.1016/j.jcrysgro.2012.08.016

Cited by 41 publications

(21 citation statements)

References 32 publications

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“…Ph Eur acetone for analysis and dried under atmosphere condition. The difference of electrodeposition method in this research work as compared to previous researches is the Zn substrate used, whereas previous researches used GaN substrate [ 23 ], Si substrate [ 24 , 65 , 66 , 67 ], steel substrate [ 25 , 68 ], FTO-coated glass [ 26 ], ITO-coated glass [ 6 , 69 ], and F-doped SnO 2 coated glass [ 70 , 71 , 72 , 73 , 74 ]. In addition, electrodeposition method in this research work is template-free as compared to previous researches that used alumina membrane templates or anodic alumina template (AAM) [ 75 , 76 ].…”

Section: Methodsmentioning

confidence: 99%

Efficient Solar-Induced Photoelectrochemical Response Using Coupling Semiconductor TiO2-ZnO Nanorod Film

et al. 2016

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Efficient solar driven photoelectrochemical (PEC) response by enhancing charge separation has attracted great interest in the hydrogen generation application. The formation of one-dimensional ZnO nanorod structure without bundling is essential for high efficiency in PEC response. In this present research work, ZnO nanorod with an average 500 nm in length and average diameter of about 75 nm was successfully formed via electrodeposition method in 0.05 mM ZnCl2 and 0.1 M KCl electrolyte at 1 V for 60 min under 70 °C condition. Continuous efforts have been exerted to further improve the solar driven PEC response by incorporating an optimum content of TiO2 into ZnO nanorod using dip-coating technique. It was found that 0.25 at % of TiO2 loaded on ZnO nanorod film demonstrated a maximum photocurrent density of 19.78 mA/cm2 (with V vs. Ag/AgCl) under UV illumination and 14.75 mA/cm2 (with V vs. Ag/AgCl) under solar illumination with photoconversion efficiency ~2.9% (UV illumination) and ~4.3% (solar illumination). This performance was approximately 3–4 times higher than ZnO film itself. An enhancement of photocurrent density and photoconversion efficiency occurred due to the sufficient Ti element within TiO2-ZnO nanorod film, which acted as an effective mediator to trap the photo-induced electrons and minimize the recombination of charge carriers. Besides, phenomenon of charge-separation effect at type-II band alignment of Zn and Ti could further enhance the charge carrier transportation during illumination.

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Section: Methodsmentioning

confidence: 99%

Efficient Solar-Induced Photoelectrochemical Response Using Coupling Semiconductor TiO2-ZnO Nanorod Film

et al. 2016

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“…Although the presence of Cl is quite reduced and dispersed at the coating/substrate interface, this amount should not be negligible. Cl has clear influence on the formation of ZnO [27]. To understand whether these elements were on the outer face of the coating or on the coating/substrate interface, new analyzes were performed following a line (see figure 15) that runs through the coating, from the external resin used in the assembly process to the substrate.…”

Section: Internal Polymer Tubementioning

confidence: 99%

Investigations on the oxidation of Zn-coated steel cables

Pinto¹,

Silva²,

Baptista³

et al. 2021

FME Transactions

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The automotive component industry has been constantly being studying to improve its performance. Bowden cables are present in opening doors, moving windows and others. In braided cables formed by galvanized wires with Zn steel exposed to the usual environmental conditions, the generation of ZnO appears, a phenomenon known as "white corrosion". The investigation consisted of mitigating the causes of the ZnO formation. Scanning electron microscopy (SEM) and Electron Probe Micro-Analyzer (EPMA) technology, allowed to detect that the generation of ZnO was induced by the presence of nucleating elements of ZnO on the surface of the steel cable before galvanizing with Zn. The S, Cl and O became visible in the interface between coating and substrate. This allowed concluding, under the coating, there were harmful products capable of triggering the ZnO nucleation reaction. So, the storage and cleaning of the steel wire before galvanizing is essential to prevent the ZnO formation.

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“…Electrodeposition is fast, simple, and it can be applied to substrates with a large area. Typically, ZnO nanostructures are cathodically electrodeposited from aqueous solutions containing different Zn 2+ salts by reducing O‐containing oxidants, such as dissolved O 2 , 22 H 2 O 2 , 23 or NO 3 – ions 24,25 . In the last case, nitrate ions can be cathodically decomposed, within the potential window, forming interfacial HO – ions as subproducts that in turn can crystallize with Zn 2+ ions and slowly grow as a nanoporous ZnO film at the electrode interface 21,26 .…”

Section: Introductionmentioning

confidence: 99%

“…Typically, ZnO nanostructures are cathodically electrodeposited from aqueous solutions containing different Zn 2+ salts by reducing O-containing oxidants, such as dissolved O 2 , 22 H 2 O 2 , 23 or NO 3 ions. 24,25 In the last case, nitrate ions can be cathodically decomposed, within the potential window, forming interfacial HOions as subproducts that in turn can crystallize with Zn 2+ ions and slowly grow as a nanoporous ZnO film at the electrode interface. 21,26 With this approach, different ZnO morphologies can be attained, like thin films, 27 nanoflowers, 28 and nanorods 29,30 among others.…”

mentioning

confidence: 99%

Spectroelectrochemistry and photoelectrochemistry of electrodeposited ZnO nanorods

Vazquez

Llorente

Zanotto

et al. 2021

Electrochemical Science Adv

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The electrodeposition of nanostructured semiconductors with tunable properties is of vital importance to develop optoelectronic devices. In this work, we introduce a novel synthesis protocol involving a multiple pulse electrodeposition nucleation stage combined with conventional potentiostatic ZnO nanorod growth in a nitrate bath. The in‐situ nucleation step allowed a higher surface density of ZnO nanorods. The effect of potential and total charge transferred during the nanorod growth was also systematically studied. Besides, spectroelectrochemical properties of different diameter electrodeposited ZnO nanorods were compared. Electrochemical Burstein‐Moss shift was observed for the different diameter ZnO nanorods when the potential was modified. Finally, spectroelectrochemical measurements of small diameter (≈60 nm) ZnO nanorods were carried out under different conditions, for example, electrolyte composition and amount of dissolved O2, to establish how these parameters affect the Burstein‐Moss shift.

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Nucleation effect and growth mechanism of ZnO nanostructures by electrodeposition from aqueous zinc nitrate baths

Cited by 41 publications

References 32 publications

Efficient Solar-Induced Photoelectrochemical Response Using Coupling Semiconductor TiO2-ZnO Nanorod Film

Efficient Solar-Induced Photoelectrochemical Response Using Coupling Semiconductor TiO2-ZnO Nanorod Film

Investigations on the oxidation of Zn-coated steel cables

Spectroelectrochemistry and photoelectrochemistry of electrodeposited ZnO nanorods

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