Self-assembled arrays of ZnO stripes by anodization

Kim, Sung Joong; Choi, Jinsub

doi:10.1016/j.elecom.2007.11.014

Cited by 48 publications

(37 citation statements)

References 19 publications

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“…Unfortunately, many of the stated techniques are problematic, needing high temperature for synthesis, and having long reaction time, utilizes toxic components and involves costly equipments [7][8][9]. Anodization is another simple method to produce ZnO structures [10]. But to produce highly oriented ZnO structures, pure oxygen needs to be simmered in the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of zinc oxide by zinc–air system

Yap

Tan

Alias

et al. 2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Synthesis of zinc oxide by zinc–air system

Yap

Tan

Alias

et al. 2009

Journal of Alloys and Compounds

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“…On the other hand, the nanosheets presented underneath the initiation layer are connected one parallel to another with a feature size of approximately 50 and 75 nm and a distance of roughly 1000 and 500 nm, for the samples anodized in aqueous and glycerol/ water electrolytes, respectively. Other authors also observed the presence of nanosheets aer zinc anodization in different electrolytes 37,38 and they attribute this morphology to the quick and fast dissolution of ZnO in water. Besides, if the zinc electrode is stirred at 2000 rpm during anodization, keeping the rest of the anodization parameters constant, an entirely different morphology is formed, i.e.…”

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confidence: 95%

ZnO/ZnS heterostructures for hydrogen production by photoelectrochemical water splitting

et al. 2016

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This work studies the photoelectrochemical behavior of novel ZnO/ZnS heterostructures obtained by means of anodization in water and glycerol/water/NH 4 F electrolytes with different Na 2 S additions under controlled hydrodynamic conditions. For this purpose different techniques such as Field Emission Scanning Electronic Microscopy (FE-SEM) with EDX, Raman spectroscopy and photoelectrochemical water splitting tests under standard AM 1.5 conditions have been carried out. The obtained results showed that the hydrodynamic conditions promoted an ordered nanotubular morphology which facilitates electron-hole separation and consequently, the photoelectrochemical activity for water splitting is enhanced. Additionally, the effect of glycerol in the anodization solutions seems to be beneficial for increasing the dark current photostability.

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“…1b, 1c and 1d show that the smaller concentration of hydrogen ion, the more regular ZnO nanoparticles. It can be explained by this reaction as follows [16,19] Reaction (1) can aggravate the dissolution of ZnO nanoparticles, as disk-like nanoparticles presented in Fig. 1c and Fig.…”

Section: Feature Of Anodic Zinc Oxidementioning

confidence: 99%

“…Apiked ZnO nanowire structures [15] are achieved by changing the NH 4 F concentration. Studies on the preparation of ZnO strips have been conducted by Sung Joong Kim et al [16].…”

Section: Introductionmentioning

confidence: 99%

“…Apiked ZnO nanowire structures [15] are achieved by changing the NH 4 F concentration. Studies on the preparation of ZnO strips have been conducted by Sung Joong Kim et al [16].Although many researches have concentrated on 1D nanoscale ZnO, research of various nanostructures in this field is still at primary stage. Hence, the new morphology and application of ZnO nanoparticle is yet to be further found.…”

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Fabrication of ZnO Nanoparticles for Photocatalytic Reduction of CO₂

Chen

Liu

et al. 2016

MATEC Web Conf.

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Abstract. ZnO nanoparticles were fabricated by anodization method. Different fabrication conditions, including pH buffers (sodium hydroxide, citric acid, oxalic acid, hydrogen peroxide), electrolyte concentration, temperature and voltage were investigated. The field emission scanning electron microscopes (FESEMs) revealed that zinc oxide nanoparticles with discal morphology were formed. The optimum conditions for fabrication of nano ZnO material with discal shape nanoparticles are 1wt% NH 4 F electrolyte in water ethano(1:1) solution at 25 o C and 40v with 0.2M citric acid as pH buffer. This ZnO material shows rather high photocatalytic reduction activity of CO 2 and the yield of CH 4 reaches 2.48 umol/g catalyst. Keywords: Zinc oxide nanoparticles, discal morphology, preparation conditions, photocatalytic reduction 1Introduction Zinc oxide has drawn considerable attention because of its attractive optical-electrical characteristics [1,2] that make it potentially applicable in a lot of fields such as ultraviolet lasing [3], photocatalysts [4]and so on [5,6]. In addition, 1D nanoscale ZnO is preferred in photoanode applications due to its larger surface area [7].Anodic oxidation has been employed in synthesis of many kinds of metal oxides with 1D nanostructure [8~10]. Research on anodization of various valve metals by P. Schmuki group [11~14] showed that anodizing can be applied to the preparation of nanostructures of other valve metals. Anodization of Znthat is one of the valve metals especially synthesis of 1D nanoscale of ZnO by anodizing has been widely investigated, since its gentle conditions and cheap equipment. S. Sreekantan et al. [7] have reported that nanoneedle, nanoflower and nanoflake of ZnO can be obtained by anodization in different concentration of sodium hydroxide. Apiked ZnO nanowire structures [15] are achieved by changing the NH 4 F concentration. Studies on the preparation of ZnO strips have been conducted by Sung Joong Kim et al [16].Although many researches have concentrated on 1D nanoscale ZnO, research of various nanostructures in this field is still at primary stage. Hence, the new morphology and application of ZnO nanoparticle is yet to be further found. The key to nanostructure of ZnO

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Self-assembled arrays of ZnO stripes by anodization

Cited by 48 publications

References 19 publications

Synthesis of zinc oxide by zinc–air system

Synthesis of zinc oxide by zinc–air system

ZnO/ZnS heterostructures for hydrogen production by photoelectrochemical water splitting

Fabrication of ZnO Nanoparticles for Photocatalytic Reduction of CO₂

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Self-assembled arrays of ZnO stripes by anodization

Cited by 48 publications

References 19 publications

Synthesis of zinc oxide by zinc–air system

Synthesis of zinc oxide by zinc–air system

ZnO/ZnS heterostructures for hydrogen production by photoelectrochemical water splitting

Fabrication of ZnO Nanoparticles for Photocatalytic Reduction of CO2

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Fabrication of ZnO Nanoparticles for Photocatalytic Reduction of CO₂