Structural and morphological study of ZnO thin films electrodeposited on n-type silicon

Ahmed, Nabil A.; Fortas, G.; Hammache, H.; Sam, S.; Keffous, A.; Manseri, A.; Guerbous, L.; Gabouze, N.

doi:10.1016/j.apsusc.2010.05.087

Cited by 13 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This behavior can be related to changes of the morphology of ZnO deposits, as already mentioned in previous papers [35,36]. Further experiments were then made on the optimized ZnO electrode obtained at -1.1 V during 5 min.…”

Section: Effect Of the Deposition Time On The Electrocatalytic Oxidatsupporting

confidence: 54%

Voltammetric determination of ascorbic acid with zinc oxide modified glassy carbon electrode

et al. 2019

View full text Add to dashboard Cite

Zinc oxide (ZnO) nanostructures electrodeposited from aqueous zinc nitrate solution at 70 °C onto glassy carbon electrode (GCE) were used as electrochemical detectors. The morphology, structure, chemical composition and conductivity of the as-deposited layers were determined using Scanning Electron Microscopy, X-Ray Diffraction, Energy Dispersive X-ray analysis and UV-vis spectroscopy. A highly oriented crystalline ZnO deposit made of a dense array of randomly oriented hexagonal nanorods was obtained without any additives in solution. The electrocatalytic oxidation of Ascorbic Acid (AA) was studied using cyclic voltammetry in 0.1 M phosphate buffer solution at pH 6.8. Comparing the response for AA oxidation on the bare and modified electrodes, the peak potential was shifted to-0,45V on ZnO/GCE with higher current densities and transfer coefficient, due to a simultaneous increase of oxidation rate and surface area. A linear relationship was determined between the anodic peak current and the AA concentration in the range of 0.1 to 5 mM.

show abstract

Section: Effect Of the Deposition Time On The Electrocatalytic Oxidatsupporting

confidence: 54%

Voltammetric determination of ascorbic acid with zinc oxide modified glassy carbon electrode

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Electrochemical deposition (ECD) is emerging as an important method to prepare semiconductor thin films such as ZnO; this method presents interesting characteristics for large-area, low-cost, generally low-temperature and soft processing of materials. This technique allows also an easy control of the dimensions of nanostructures by means of appropriate growth parameters [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The one-step electrodeposition of ZnO films has been extensively reported [10], using oxygen dissolved in an aqueous solution at 70°C. Izaki and Omi [12] were the first to report ZnO formation at the cathode by using nitrate ions as oxygen precursor.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, several papers reported the preparation of ZnO films on conductive oxide or semiconductive electrode substrates, such as indium tin oxide (ITO) [23], fluorine-doped tin oxide (FTO) [24], n-type silicon [10] and gallium nitride [25]. However, to the best of our knowledge there is no report about depositing ZnO on vitreous carbon from an aqueous solution by an electrochemical method.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New insight into the mechanism of cathodic electrodeposition of zinc oxide thin films onto vitreous carbon

Ahmed¹,

Eyraud²,

Hammache³

et al. 2013

Electrochimica Acta

Self Cite

View full text Add to dashboard Cite

International audienceIn this study, the mechanism of zinc oxide (ZnO) electrodeposition from aqueous zinc nitrate solution at 70°C was investigated on vitreous carbon and bulk zinc electrodes using cyclic voltammetry experiments. Mechanisms are presented for the ZnO formation: the first widely accepted route corresponds to ZnO precipitation from Zn 2+ and OH-produced by NO3-reduction; the second route, which is discussed in this article, is due to Zn 2+ reduction into metallic Zn followed by its oxidation by nitrate ions. For this case, we demonstrate why Zn formation can not be observed while Zn 2+ reduction was detected. Structural and morphological of bulk deposits were investigated using X-ray diffraction and scanning electron microscopy. Well-oriented ZnO nanorods forming thin films were grown on vitreous carbon from Zn(NO3)2 solution at low cathodic potential corresponding to that of zinc metal deposition. X-ray diffraction (XRD) measurements showed that the nanorods are crystalline and preferably grown along the (002) direction

show abstract

“…Six peaks appear in the diffraction spectrum in the 2θ interval of 30-65 o , and correspond to (100), (002), (101), (102), (110) and (103) orientations of the ZnO hexagonal structure. The film formed is polycrystalline with a preferential orientation of the (002) diffraction peak, showing that the film is preferentially oriented in the c-axis direction, which indicates that this axis in the ZnO film tends to grow perpendicular to the substrate surface (Ahmed et al, 2010). In the XRD pattern, characteristic peaks of the (111) Au substrate also appears by comparison with JCPDS 065-2870 card.…”

Section: Characterization Of the Filmmentioning

confidence: 81%

ZnO electrodeposition onto gold from recordable compact discs and its use as photocatalyst under solar irradiation

Silva

Foletto

Dorneles

et al. 2013

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-A ZnO film was electrodeposited onto a gold substrate obtained from a recordable compact disc and tested as photocatalyst in degradation of dye in aqueous solution. X-ray diffractometry and atomic force microscopic analysis showed a pure ZnO phase with particle sizes in the nanometric scale. The results showed that the photocatalytic activity of the film is significant, with more than 90 % degradation of the dye in under 6 h sunlight irradiation. The photocatalytic process in sunlight follows first-order kinetics.

show abstract

Structural and morphological study of ZnO thin films electrodeposited on n-type silicon

Cited by 13 publications

References 35 publications

Voltammetric determination of ascorbic acid with zinc oxide modified glassy carbon electrode

Voltammetric determination of ascorbic acid with zinc oxide modified glassy carbon electrode

New insight into the mechanism of cathodic electrodeposition of zinc oxide thin films onto vitreous carbon

ZnO electrodeposition onto gold from recordable compact discs and its use as photocatalyst under solar irradiation

Contact Info

Product

Resources

About