Zinc oxide films obtained by sol-gel method from film-forming solutions

Кузнецова, Светлана А.; Mongush, E.; Lisitsa, Konstantin V.

doi:10.1088/1742-6596/1145/1/012020

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…Additionally, the photocatalytic activity of the ZnO layers was not explored. In the case of TiO2, the sole available demonstration of SA-stabilized deposition sol is found in the previous work of this paper's author [37], where a SA-based TTIP sol with a 1:3 TTIP:SA molar ratio proved suitable for a highly-conformal TiO2-functionalization coating on a high-aspect ratio anodic alumina substrate [36], and the selection of SA as the stabilizing agent stemmed from its affinity to the alumina surface. Hence, in the present study, the deposition of photocatalytic thin films of TiO2 and ZnO from novel SA-based sol formulations, governed by Ti [SA] and Zn[SA] complexation stoichiometry of 1:3 and 1:2, respectively, is thoroughly investigated.…”

Section: Introductionmentioning

confidence: 91%

“…However, this premise remains underexplored in the literature. The SA film-forming properties have been investigated only on one occasion of ZnO deposition sols by Kuznetsova et al [36], revealing that salicylate sols yield optically transparent ZnO films with improved properties have been investigated only on one occasion of ZnO deposition sols by Kuznetsova et al [36], revealing that salicylate sols yield optically transparent ZnO films with improved electrical properties. This study employed a zinc precursor-to-SA ratio of 1:1, deviating from the typical zinc salicylate complex stoichiometry of 1:2 [34].…”

Section: Introductionmentioning

confidence: 99%

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Optically Transparent TiO2 and ZnO Photocatalytic Thin Films via Salicylate-Based Sol Formulations

Stefanov

2023

Coatings

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Sol compositions for transparent TiO2 and ZnO photocatalytic thin film deposition are of interest for the wet-chemical fabrication of self-cleaning coatings. The choice of stabilizing agent is crucial for the sol film-forming properties, with acetylacetone and monoethanolamine conventionally employed for TiO2 and ZnO deposition sols, respectively. Salicylic acid (SA), capable of chelating both Ti(IV) and Zn(II) precursors, remains underexplored. This study presents novel SA-based sol formulations for the deposition of both TiO2 and ZnO films, based on titanium tetraisopropoxide (TTIP) and zinc acetate dihydrate (ZAD) precursors, in a fixed 1:3 (TTIP:SA) and 1:2 (ZAD:SA) ratio, and isopropanol solvent, varied across the 1:10 to 1:20 precursor-to-solvent ratio range. Fourier-Transform Infrared Spectroscopy analysis and Density Functional Theory computations confirmed the formation of H2Ti[SA]3 and Zn[SA]2·2H2O complexes. Scanning Electron Microscopy, X-ray diffraction, and Ultraviolet-Visible spectroscopy were employed to study the structural and optical properties of the dip-coated films, revealing dense TiO2 (86–205 nm) and ZnO (35–90 nm) layers of thickness proportional to the salicylate concentration and transmittance in the 70–90% range. Liquid-phase Methylene blue (MB) photooxidation experiments revealed that all films exhibit photocatalytic activity, with ZnO films being superior to TiO2, with 2.288 vs. 0.366 nm h−1 cm−2 MB removal rates.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Optically Transparent TiO2 and ZnO Photocatalytic Thin Films via Salicylate-Based Sol Formulations

Stefanov

2023

Coatings

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“…[92][93][94] Although zinc salicylate is soluble in water, the reaction between salicylic acid and ZnO results in the formation of insoluble plastic-like masses of 2:1 Zn(salicylate) and 1:1 Zn(salicylate) salts. [95][96][97] A surprising result is that relative to the control coating, for HT-SAL − containing coatings, a more positive potential value is observed adjacent to the model defect (ca. −0.7 V vs SHE) and a more negative potential is observed in the region which trails the disbondment front (ca.…”

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confidence: 99%

Role of Smart-Release Pigments in Preventing Corrosion Driven Cathodic Disbondment of Organically Coated Hot Dip Galvanised Steel

Ansell

Berry

McGettrick

et al. 2023

J. Electrochem. Soc.

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The role of smart-release corrosion inhibitive pigments in preventing cathodic delamination of organically coated hot-dip galvanised steel is investigated. The pigments consisted of hydrotalcite exchanged with a range of inorganic and organic anionic species and were dispersed in a model PVB coating. A scanning Kelvin probe technique was used to determine cathodic delamination rates, and the inhibition efficiencies obtained for inorganic ions increased in the order CO32-  MoO42-  NO3-  VO43-  WO42-  PO43-  CrO42-. The inhibition efficiencies for organic-based pigments increased in the order triazole <phenylphosphonate <trans-cinnamate <benzoate <salicylate <benzotriazole. The inhibition efficiency afforded by the best performing organic inhibitor, benzotriazole (BTA), rivalled that of HT containing stored chromate anions. Findings are consistent with HT-BTA acting to sequester anions from the underfilm electrolyte, releasing BTA- which subsequently strongly adsorbs on the underfilm metal surface but can also form an insoluble Zn-BTA precipitate at the coating-defect boundary.

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Nanoparticles functionalized ceramic membranes: fabrication, surface modification, and performance

Ewis

Ismail

Hafiz

et al. 2021

Environ Sci Pollut Res

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Zinc oxide films obtained by sol-gel method from film-forming solutions

Cited by 5 publications

References 10 publications

Optically Transparent TiO2 and ZnO Photocatalytic Thin Films via Salicylate-Based Sol Formulations

Optically Transparent TiO2 and ZnO Photocatalytic Thin Films via Salicylate-Based Sol Formulations

Role of Smart-Release Pigments in Preventing Corrosion Driven Cathodic Disbondment of Organically Coated Hot Dip Galvanised Steel

Nanoparticles functionalized ceramic membranes: fabrication, surface modification, and performance

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