X-ray Diffraction, XPS, and Raman Spectroscopy of Coated ZnO:Al (1—7 at%) Nanoparticles

Konan, Fransisco Kouadio; Hartiti, Bouchaíb; Batan, Abdelkrim; Aka, Boko

doi:10.1380/ejssnt.2019.163

Cited by 8 publications

(3 citation statements)

References 37 publications

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“…The Zn2p high-resolution spectrum shows that in the TiO 2 /ZnO hybrid nanosponges the doublet peaks corresponding to Zn2p 1/2 and Zn2p 3/2 can be appreciated at approximately 1045.2 and 1022 eV, respectively, and the distance between them is about 23.2 eV. These results proved that Zn species are in its Zn +2 oxidation state, confirming the presence of ZnO in the TiO 2 /ZnO nanostructures [ 23 , 25 , 49 , 51 , 52 , 54 ].…”

Section: Resultsmentioning

confidence: 61%

“…It can be observed that, in all XPS spectra, the peak corresponding to C1s at position 284.6 eV appears, which is a fact related to the organic species involved in the preparation (glycerol) and to the contaminants adsorbed in the nanostructures. C1s peak position can be used as a reference for the rest of the peaks involved in the XPS spectra [ 23 , 51 ]. As expected, peaks related to Zn are only observed in TiO 2 /ZnO hybrid nanostructures.…”

Section: Resultsmentioning

confidence: 99%

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Original Approach to Synthesize TiO2/ZnO Hybrid Nanosponges Used as Photoanodes for Photoelectrochemical Applications

et al. 2021

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In the present work, TiO2/ZnO hybrid nanosponges have been synthesized for the first time. First, TiO2 nanosponges were obtained by anodization under hydrodynamic conditions in a glycerol/water/NH4F electrolyte. Next, in order to achieve the anatase phase of TiO2 and improve its photocatalytic behaviour, the samples were annealed at 450 °C for 1 h. Once the TiO2 nanosponges were synthesized, TiO2/ZnO hybrid nanosponges were obtained by electrodeposition of ZnO on TiO2 nanosponges using different temperatures, times, and concentrations of zinc nitrate (Zn(NO3)2). TiO2/ZnO hybrid nanosponges were used as photoanodes in photoelectrochemical water splitting tests. The results indicate that the photoelectrochemical response improves, in the studied range, by increasing the temperature and the Zn(NO3)2 concentration during the electrodeposition process, obtaining an increase in the photoelectrochemical response of 141% for the TiO2/ZnO hybrid nanosponges electrodeposited at 75 °C with 10 mM Zn(NO3)2 for 15 min. Furthermore, morphological, chemical, and structural characterization was performed by Field Emission Scanning Electron Microscopy (FE-SEM) with Energy Dispersive X-Ray spectroscopy (EDX), Raman Confocal Laser Spectroscopy, X-Ray Photoelectron Spectroscopy (XPS), and Grazing Incidence X-Ray Diffraction (GIXRD).

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Original Approach to Synthesize TiO2/ZnO Hybrid Nanosponges Used as Photoanodes for Photoelectrochemical Applications

et al. 2021

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“…Thus, blisters are formed when a film-forming system is applied to a heated surface. As a result, the films demonstrate inhomogeneous surface morphology [16][17][18].…”

Section: Surface Morphologymentioning

confidence: 99%

THE EFFECT OF DEPOSITION TECHNIQUE ON FORMATION OF TRANSPARENT CONDUCTIVE COATINGS OF SnO2

Kemelbekova¹,

Lebedev²,

Grushevskaya³

et al. 2022

phst

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The producing technology of transparent conductive layers is the basis for many optoelectronic devices.To increase transparency and conductivity at low-cost and controlled methods is an important challenge. Studied samples of SnO 2 coatings were obtained by sol-gel method. The deposition of films on glass substrates was carried out by dip coating, spin-coating and sprays-pyrolysis methods. According to microweighing, the film thickness varies from 250 nm to 290 nm. The layer with the most uniform thickness was achieved using spray pyrolysis. Films deposited by this technique exhibit the greatest transparency and lowest resistance. It is important to note that these samples have the minimum scatter of resistance values depending on the surface area. In case dip coating technique the resultant film contains open-and closedtype blisters. This confirms the fact of inhomogeneous surface morphology of these films. X-ray diffraction analysis showed that films obtained by spin-coating and dipping methods contain SnO 2 crystallites, the size of which does not exceed 10.3 nm; while films obtained by spay pyrolysis are amorphous. This is because the formation of the structure in the spay pyrolysis proceeds faster due to the substrate heating.

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Carbon fabric coated with nanostructured zinc oxide layers for use in triboelectric self-powered touch sensors

Petrushenko,

Fijalkowski,

Kopach

et al. 2024

J Mater Sci: Mater Electron

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An environmentally friendly, low-cost, and lightweight biocompatible textile triboelectric material was made by in situ coating carbon fabric (CF) with nanostructured zinc oxide (ZnO) layers using the automatic Successive Ionic Layer Adsorption and Reaction (SILAR) method. Depending on the deposition mode, we created triboelectric CF/ZnO textiles with multidirectionally intergrown short ZnO nanorods or with arrays of ZnO nanosheets. The Raman spectra confirmed the hexagonal wurtzite structure of both types of ZnO layers and the unique a-axis texture of the nanosheets. In the developed triboelectric CF/ZnO/PET/ITO sensors, the upper tribonegative part was made of a polyethylene terephthalate film coated with a thin layer of indium-tin oxide, and the lower tribopositive part was made of CF/ZnO textile. In tests with repeated hand tapping at low frequency 1.3–13 Hz and a force of ∼ 5 N (pressure of ∼ 33 kPa), the open-circuit voltage pulses were ∼ 15 V for short ZnO nanorods and ∼ 30 V for ZnO nanosheets, their duration did not exceed a few milliseconds. Due to the nanosheet morphology of the ZnO layer, the maximum touch-induced surface charge density for the corresponding triboelectric textile (0.7 µC/m2) was almost twice than for the CF/ZnO textile with intergrown ZnO short nanorods (0.4 µC/m2). The touch sensor with ZnO nanosheets showed an output voltage of 3.6 V, a current density of 1.47 µA/cm2, and a power density of 1.8 µW/cm2. It can be used as a dual-mode sensor due to ability to recognize the hardness of objects by analyzing the output current peaks.

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X-ray Diffraction, XPS, and Raman Spectroscopy of Coated ZnO:Al (1—7 at%) Nanoparticles

Cited by 8 publications

References 37 publications

Original Approach to Synthesize TiO2/ZnO Hybrid Nanosponges Used as Photoanodes for Photoelectrochemical Applications

Original Approach to Synthesize TiO2/ZnO Hybrid Nanosponges Used as Photoanodes for Photoelectrochemical Applications

THE EFFECT OF DEPOSITION TECHNIQUE ON FORMATION OF TRANSPARENT CONDUCTIVE COATINGS OF SnO2

Carbon fabric coated with nanostructured zinc oxide layers for use in triboelectric self-powered touch sensors

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