Deposition of Multilayer Films of ZnO by Sol-gel Process on Stainless Steel Substrates for Energy Harvesting Devices

CNTs– TiO 2 films with different morphology were fabricated on stainless steel substrates through chemical vapor hydrolysis deposition (CVHD) process and sol–gel process, respectively. Their morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The photocatalytic properties of the films were tested in the degradation of methyl orange by UV light irradiation. The results revealed that TiO 2 nanoparticles could form a continuous layer on the surface of CNTs through CVHD process. While for sol–gel process, most TiO 2 nanoparticles were isolated and only a small amount of TiO 2 nanoparticles attached on the surface of CNTs. And the photocatalytic property of TiO 2/CNTs film synthesized through CVHD process was better than that of TiO 2/CNTs films synthesized through sol–gel process. Electrochemical impedance spectroscopy (EIS) analysis illuminated that TiO 2/CNTs synthesized through CVHD process displayed a smaller resistance than the sample which was synthesized through sol–gel process and certified that the close combination between TiO 2 and CNTs could minimize recombination of photogenerated electrons and holes, and thus promote the photocatalytic property.

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Corrosion Protection of Stainless Steel by ZrO2-CeO2 Sol-Gel Coatings

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.1838 ◽

2008 ◽

Vol 368-372 ◽

pp. 1838-1840

Author(s):

Jian Xiong Ye ◽

Xin Gang Yu ◽

Wen Yue Bi ◽

De Jun Li ◽

Hong Wen Ma ◽

...

Keyword(s):

Thin Film ◽

Electron Microscopy ◽

Stainless Steel ◽

316L Stainless Steel ◽

Sol Gel ◽

Potentiodynamic Polarization Curve ◽

Coated Substrate ◽

Sol Gel Process ◽

Steel Substrates ◽

Scanning Electron

ZrO2-CeO2 thin film was successfully prepared on 316L stainless steel by sol-gel process and the corrosion characteristics of the substrate coated with ZrO2-CeO2 thin film were evaluated through potentiodynamic polarization curve obtained in deaerated 15% H2SO4. The results show that, with the increase of CeO2 content, the corrosion rate of 316L stainless steel substrates coated with ZrO2-CeO2 thin film decreases. The surface morphology of the coating was observed by field scanning electron microscopy and the elements in the surface of coated substrate analyzed by FEM-EDX.

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Silica-Copper Oxide Composite Thin Films as Solar Selective Coatings Prepared by Dipping Sol Gel

Research Letters in Materials Science ◽

10.1155/2008/190920 ◽

2008 ◽

Vol 2008 ◽

pp. 1-5 ◽

Cited By ~ 13

Author(s):

E. Barrera-Calva ◽

J. Méndez-Vivar ◽

M. Ortega-López ◽

L. Huerta-Arcos ◽

J. Morales-Corona ◽

...

Keyword(s):

Thin Films ◽

Stainless Steel ◽

Copper Oxide ◽

Photoelectron Spectroscopy ◽

Sol Gel ◽

Silica Matrix ◽

Composite Thin Films ◽

X Ray ◽

Molar Ratios ◽

Steel Substrates

Silica-copper oxide (silica-CuO) composite thin films were prepared by a dipping sol-gel route using ethanolic solutions comprised TEOS and a copper-propionate complex. Sols with different TEOS/Cu-propionate (Si/Cu) molar ratios were prepared and applied on stainless steel substrates using dipping process. During the annealing process, copper-propionate complexes developed into particulate polycrystalline CuO dispersed in a partially crystallized silica matrix, as indicated by the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses. The gel thermal analysis revealed that the prepared material might be stable up to400°C. The silica-CuO/stainless steel system was characterized as a selective absorber surface and its solar selectivity parameters, absorptance (α), and emittance (ε) were evaluated from UV-NIR reflectance data. The solar parameters of such a system were mostly affected by the thickness and phase composition of theSiO2-CuO film. Interestingly, the best solar parameters (α= 0.92 andε= 0.2) were associated to the thinnest films, which comprised a CuO-Cu2Omixture immersed in the silica matrix, as indicated by XPS.

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Effect of plasma pretreatment on durability of sol-gel superhydrophobic coatings on laser modified stainless steel substrates

Journal of Adhesion Science and Technology ◽

10.1080/01694243.2018.1482735 ◽

2018 ◽

Vol 32 (21) ◽

pp. 2394-2404 ◽

Cited By ~ 3

Author(s):

S. Pradheebha ◽

R. Unnikannan ◽

Ravi N. Bathe ◽

G. Padmanabham ◽

R. Subasri

Keyword(s):

Stainless Steel ◽

Sol Gel ◽

Superhydrophobic Coatings ◽

Plasma Pretreatment ◽

Steel Substrates

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Highly (h00)-oriented KNN homo-multilayer films grown on Si by sol-gel process via an alternating non-alkoxide and alkoxide route

Ceramics International ◽

10.1016/j.ceramint.2020.08.110 ◽

2021 ◽

Vol 47 (1) ◽

pp. 87-93

Author(s):

Wei Zhang ◽

Jianqiu Bao ◽

Haiyong Zhu ◽

Xuehua Zhang ◽

Zhiyi Jiang ◽

...

Keyword(s):

Sol Gel ◽

Multilayer Films ◽

Sol Gel Process ◽

Alkoxide Route

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Planarization of Metal Substrates for Solar Mirrors

MRS Proceedings ◽

10.1557/proc-121-635 ◽

1988 ◽

Vol 121 ◽

Cited By ~ 5

Author(s):

Carol S. Ashley ◽

Scott T. Reed ◽

A. Roderick Mahoney

Keyword(s):

Stainless Steel ◽

Sol Gel ◽

Smoothing Effect ◽

Next Generation ◽

Solar Concentrators ◽

Optical Techniques ◽

Specular Reflectance ◽

Sol Gel Films ◽

Steel Substrates ◽

Gel Processing

ABSTRACTThe planarizing ability of sol-gel films was investigated on several as-rolled stainless steel substrates. The smoothing effect afforded by the films was evaluated, using optical techniques, following deposition of silver over the planarized substrates. The specular reflectance of various substrates, initially ranging from 0.36 to 0.90, could be improved to final reflectance values of -0.93 with sol-gel processing. This process is being used to prepare prototype foil mirrors for evaluation in the next generation of solar concentrators.

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Macro-Residual Stress in 304 Stainless Steel Coated with ZrO2-CeO2 Thin Films by Sol-Gel Process

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.2649 ◽

2007 ◽

Vol 336-338 ◽

pp. 2649-2651 ◽

Cited By ~ 1

Author(s):

Xin Gang Yu ◽

Lan Yun Liu ◽

Yan Bin Zuo ◽

Lin Jiang Wang ◽

Hong Wen Ma ◽

...

Keyword(s):

Residual Stress ◽

Stainless Steel ◽

Surface Layer ◽

Steel Substrate ◽

Substrate Surface ◽

Sol Gel ◽

Dip Coating ◽

Metal Substrate ◽

304 Stainless Steel ◽

Sol Gel Process

X-ray diffraction (XRD) method to measure the residual stress existing in the metal substrate surface layer was introduced and the sol-gel ZrO2-CeO2 thin film was successfully prepared on SUS304 stainless steel substrate by dip-coating process. The macro residual stress existing in metal substrate was analyzed by XRD. It turns out that the compressive stress existing in the metal substrate surface layer increases with the increase of heat-treated temperature. Based on the above study, colored stainless steels of high quality were prepared by sol-gel process.

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Corrosion Behavior of Amorphous Sol–Gel TiO2–ZrO2 Nano Thickness Film on Stainless Steel

Coatings ◽

10.3390/coatings11080988 ◽

2021 ◽

Vol 11 (8) ◽

pp. 988

Author(s):

Lidija Ćurković ◽

Helena Otmačić Ćurković ◽

Irena Žmak ◽

Mihone Kerolli Mustafa ◽

Ivana Gabelica

Keyword(s):

Stainless Steel ◽

Corrosion Behavior ◽

Electrochemical Impedance ◽

Sol Gel ◽

Chelating Agent ◽

Dip Coating ◽

Emission Spectrometry ◽

Aisi 316L ◽

Corrosion Properties ◽

Sol Gel Process

In this work, a single-layer TiO2–ZrO2 thin film is deposited on the AISI 316L austenitic stainless steel by the sol–gel process and the dip coating method to improve its corrosion resistance properties. For the sol preparation, titanium isopropoxide and zirconium butoxide are used as the precursors, yttrium acetate hydrate is used for the ZrO2 stabilization, i-propanol as the solvent, nitric acid as the catalyst, acetylacetone as the chelating agent, and the distilled water for the hydrolysis. The deposited films are annealed at 400 °C or 600 °C. Morphology and phase composition of the sol–gel TiO2–ZrO2 films and powders are analyzed by scanning electron microscopy (SEM) equipped with EDX detector and X-ray diffraction (XRD), respectively. The thickness of the sol–gel TiO2–ZrO2 films deposited on the stainless steel is determined by glow discharge optical emission spectrometry (GD-OES). The corrosion behavior of the stainless steel, coated by amorphous films, is evaluated in 3 wt% NaCl and 0.5 mol dm−3 HCl by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. It is found that the sol–gel TiO2–ZrO2 films with the amorphous structure, deposited by the sol–gel process, and calcined at 400 °C significantly enhance the corrosion properties of AISI 316L in both chloride media.

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In Vitro Bioactivity of AISI 316L Stainless Steel Coated with Hydroxyapatite-Seeded 58S Bioglass

MRS Advances ◽

10.1557/adv.2019.372 ◽

2019 ◽

Vol 4 (57-58) ◽

pp. 3133-3142 ◽

Cited By ~ 1

Author(s):

Jorge López-Cuevas ◽

Juan Carlos Rendón-Angeles ◽

Juan Méndez-Nonell ◽

Héctor Barrientos-Rodríguez

Keyword(s):

Stainless Steel ◽

316L Stainless Steel ◽

Sol Gel ◽

Aisi 316L ◽

In Vitro Bioactivity ◽

Aisi 316L Stainless Steel ◽

Gel Technique ◽

Static Conditions ◽

Steel Substrates

ABSTRACTAISI 316L stainless steel substrates were coated with hydroxyapatite [HAp, Ca10(PO4)6(OH)2]-seeded 58S bioglass, and then their in vitro bioactivity was evaluated by soaking in a simulated body fluid (SBF). The bioglass was prepared via the sol-gel technique and nanometric HAp single crystals were obtained by hydrothermal synthesis. The coatings had bioglass/HAp weight ratios of 100/0, 90/10 or 80/20. The in vitro bioactivity tests were carried out under static conditions at 37 °C and pH = 7.25, for time periods ranging from 1 to 21 days. The results showed that the HAp-seeding significantly accelerates the formation of a HAp layer at the bioglass-coated steel surface during the bioactivity tests.

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