Seed layer effect on morphological, structural, and optical properties of electrochemically grown ZnO nanowires over different SnO2:F/glass substrates

Castillo-Rodriguez, Judith; Pereyra, Carlos; Valente, P.; Sere, Andres; Marotti, Ricardo E.; Hevia, Samuel A.; Dalchiele, Enrique A.; Rio, Rodrigo Del

doi:10.1007/s10008-020-04527-z

Cited by 8 publications

(4 citation statements)

References 41 publications

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“…In the synthesis 1 ml of a Zn(CH 3 COO) 2 (10 mM) ethanolic solution was added dropwise via spin-coating (2000 rpm was applied for 40 s), and dried at 105 °C for 10 min to evaporate the solvent. 46 This process was repeated up to 4 times. Finally, a thermal treatment was performed for 20 min at 350 °C in a tubular furnace.…”

Section: Methodsmentioning

confidence: 99%

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Optimization of Ag₂S Quantum Dots Decorated ZnO Nanorod Array Photoanodes for Enhanced Photoelectrochemical Performances

Solís-Cortés

Jiménez

Jauregui

et al. 2021

J. Electrochem. Soc.

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The synthesis of Ag2S quantum dots (QDs) deposited on the surface of electrodeposited ZnO nanorods (NRs) by a successive ionic-layer adsorption and reaction (SILAR) method is reported. A Box-Behnken response surface factorial design was used to organize the experiments conducted and identify the effects of three electrochemical parameters and their potential interactions. These parameters include zinc precursor concentration in the electrolytic bath, the electrolytic bath temperature and the electrodeposition time on the morphological and structural properties of the electrochemically grown ZnO nanorods. Morphological, structural and optical characterizations of these NRs heterojunctions were done. A direct band gap for Ag2S QDs, tuned between 2.54 and 2.73 eV by varying the SILAR cycle numbers, was determined. The presence of ZnO nanostructures increases the light scattering capability of the samples, allowing an important quantity of diffuse light near the absorption edge of Ag2S. The photoelectrochemical performance of these ZnO NRs decorated with Ag2S QDs based photoanodes has been evaluated. The SILAR parameters related to the growth of the Ag2S QDs that optimize the performance of this photoelectrode are presented. The effect of a ZnS passivation layer has been studied leading to an increase of about 400% in the short-circuit current density after passivation.

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Section: Methodsmentioning

confidence: 99%

“…Finally, a thermal treatment was performed for 20 min at 350 °C in a tubular furnace. 46 Substrates obtained following the previously described procedure conforms one ZnO seed layer (1SL). By repeating this procedure on the resulting modified-glass (i.e., 1SL) in a second cycle, the corresponding 2SL substrates were obtained.…”

Section: Methodsmentioning

confidence: 99%

Optimization of Ag₂S Quantum Dots Decorated ZnO Nanorod Array Photoanodes for Enhanced Photoelectrochemical Performances

Solís-Cortés

Jiménez

Jauregui

et al. 2021

J. Electrochem. Soc.

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“…In addition, peaks other than the characteristic peaks in the range 30°− 40°could not be seen in the glass slide-based samples because there is a mismatch between the glass slide and the coated Cu:ZnO layer. This suggests that the ZnO seed layer is more ideal for film coating because it allows ZnO crystal growth with Cu doping, although it is intended for nanorod or nanowire growth [26,27]. The slight shift in the original ZnO peaks' positions demonstrates that doping is successful by replacing the Zn 2+ ions with Cu 2+ ions in both of the samples.…”

Section: Structural Characterizationmentioning

confidence: 99%

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films

Özütok

Yakar

et al. 2021

Mater. Res. Express

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In this study, we report the synthesis of Zn0.075Cu0.025O films by chemical bath deposition to determine the effect of substrate (glass slide or ZnO seed layer) on the structural and H2 gas sensing properties of the produced films. The crystal phase, structural topography, surface morphology and functional groups of the as-synthesized films as well as H2 gas sensing properties were investigated. Although both films have a hexagonal wurtzite structure, ZnO seed layer-based Zn0.075Cu0.025O film is more crystalline than glass slide-based Zn0.075Cu0.025O films. ZnO seed layer-based Zn0.075Cu0.025O films exhibited much more nanorod and less nanosphere forms compared to glass slide-based Zn0.075Cu0.025O films. EDX analysis and Raman spectra of both samples confirmed the presence of defects in Cu:ZnO samples. ZnO seed layer-based sensors showed higher response (140%) and lower operating temperature (80°C) compared to glass slide-based sensors (87% response and 140°C operating temperature). The most important thing to note here is that the fabricated sensors exhibited high response at room temperature. The responses at room temperature was found as 46% and 23% for the ZnO seed layer-based and glass slide-based sensors, respectively. Sensors operating at room temperature are especially important for commercial applications.

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“…However, the importance of a 1D deposit in literature has been debated to overcome this system’s significant drawback: limited charge transfer [ 5 ]. In addition, our group has reported the substrate effect on the final material properties regarding similar systems [ 16 ]. Hence, the importance of performing a comprehensive study using the same conditions (i.e., TNT as a substrate) and different synthetic approaches to modify the TiO 2 template with hematite.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Different Synthetic Routes of Hybrid Hematite-TiO2 Nanotubes-Based Electrodes

et al. 2021

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Nowadays, green hydrogen is an important niche of interest in which the search for a suitable composite material is indispensable. In this sense, titanium oxide nanotubes (TiO2 nanotube, TNTs) were prepared from double anodic oxidation of Ti foil in ethylene glycol electrolyte. The morphology of the nanotubes was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Once characterized, nanotubes were used as templates for the deposition of hematite. The use of three synthetic procedures was assayed: Chemical Vapor Deposition (CVD), Successive Ionic Layer Adsorption and Reaction (SILAR), and electrochemical synthesis. In the first case, CVD, the deposition of hematite onto TiO2 yielded an uncovered substrate with the oxide and a negative shift of the flat band potential. On the other hand, the SILAR method yielded a considerable amount of hematite on the surface of nanotubes, leading to an obstruction of the tubes in most cases. Finally, with the electrochemical synthesis, the composite material obtained showed great control of the deposition, including the inner surface of the TNT. In addition, the impedance characterization showed a negative shift, indicating the changes of the interface electrode–electrolyte due to the modification with hematite. Finally, the screening of the methods showed the electrochemical synthesis as the best protocol for the desired material.

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Seed layer effect on morphological, structural, and optical properties of electrochemically grown ZnO nanowires over different SnO2:F/glass substrates

Cited by 8 publications

References 41 publications

Optimization of Ag₂S Quantum Dots Decorated ZnO Nanorod Array Photoanodes for Enhanced Photoelectrochemical Performances

Optimization of Ag₂S Quantum Dots Decorated ZnO Nanorod Array Photoanodes for Enhanced Photoelectrochemical Performances

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films

Comparison of Different Synthetic Routes of Hybrid Hematite-TiO2 Nanotubes-Based Electrodes

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Seed layer effect on morphological, structural, and optical properties of electrochemically grown ZnO nanowires over different SnO2:F/glass substrates

Cited by 8 publications

References 41 publications

Optimization of Ag2S Quantum Dots Decorated ZnO Nanorod Array Photoanodes for Enhanced Photoelectrochemical Performances

Optimization of Ag2S Quantum Dots Decorated ZnO Nanorod Array Photoanodes for Enhanced Photoelectrochemical Performances

Substrate critical effect on the structural and H2Gas sensing characteristics of solution-processed Zn0.075Cu0.025O films

Comparison of Different Synthetic Routes of Hybrid Hematite-TiO2 Nanotubes-Based Electrodes

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Optimization of Ag₂S Quantum Dots Decorated ZnO Nanorod Array Photoanodes for Enhanced Photoelectrochemical Performances

Optimization of Ag₂S Quantum Dots Decorated ZnO Nanorod Array Photoanodes for Enhanced Photoelectrochemical Performances

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films