Sol–gel fabrication and enhanced optical properties, photocatalysis, and surface wettability of nanostructured titanium dioxide films

Alzamani, Mehdi; Shokuhfar, Ali; Eghdam, Ebrahim; Mastali, Sadegh

doi:10.1016/j.mssp.2013.03.017

Cited by 14 publications

(4 citation statements)

References 28 publications

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“…The effect of minimizing the reflectance of light is achieved, among others, by depositing an antireflection coating. The most popular antireflection coating used in photovoltaics are: SiO 2 , a-SiNx:H, TiO 2 , a-Si:C:H, ZnS, Ta 2 O 5 , SnxOx, SiNx, MgF 2 [1][2][3][4][5][6][7][8][9][10][11][12]. Titanium dioxide 4 and Ti(OCH(CH 3 ) 2 ) 4 , which react with H 2 O.…”

Section: Introductionmentioning

confidence: 99%

Structure and optical properties of TiO₂ thin films deposited by ALD method

2017

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This paper presents the results of study on titanium dioxide thin films prepared by atomic layer deposition method on a silicon substrate. The changes of surface morphology have been observed in topographic images performed with the atomic force microscope (AFM) and scanning electron microscope (SEM). Obtained roughness parameters have been calculated with XEI Park Systems software. Qualitative studies of chemical composition were also performed using the energy dispersive spectrometer (EDS). The structure of titanium dioxide was investigated by X-ray crystallography. A variety of crystalline TiO 2 was also confirmed by using the Raman spectrometer. The optical reflection spectra have been measured with UV-Vis spectrophotometry.

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Section: Introductionmentioning

confidence: 99%

Structure and optical properties of TiO₂ thin films deposited by ALD method

2017

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“…The experimental contact angle data show that under UVA illumination the surface hydrophilicity is enhanced. UV illumination creates more surface defect states, which can provide quick water diffusion capacity (superhydrophilicity) and accommodates more reactants as well as increases the photocatalytic activity [38][39][40]. This explained the enhancement in the degradation rate of the second and third degradation cycles compared to the first one in case of samples with thickness of 20 nm and 40 nm.…”

Section: Photocatalytic Activity Of Zno Thin Filmsmentioning

confidence: 96%

Optimization of the structural and optical properties of ALD grown ZnO thin films for photocatalytic applications: thickness dependence

Shenouda¹,

Saif²,

Baradács³

et al. 2022

Phys. Scr.

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Thin films of ZnO with different thicknesses (ranging from 8 to 40 nm) have been prepared by plasma-enhanced atomic layer deposition. Grazing incidence X-ray diffraction shows the nano-crystalline structure of the films with high degree of disorder. The films have also lattice oxygen and non-lattice oxygen where the film with 20 nm thickness has the highest percentage of the non-lattice oxygen. These films have indirect optical transitions. The energy gap increases slightly with decreasing the film thickness (2.96, 3.03 and 3.16 eV for the thicknesses 40, 20 and 8 nm, respectively). These films have strong photocatalytic activity to treat the water from the organic dyes such as Levafix Brilliant Red. The film with thickness 20 nm has the optimum photocatalytic activity and the lowest contact angle with water. The photoinduced super-hydrophilic nature of ZnO film (20 nm) renders this film suitable for antifogging application. The high photocatalytic activity and super-hydrophilicity are due to the low recombination rate of charge carriers accompanied to the excess of oxygen vacancies and the high degree of structural disorder.

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“…Application of high working gas temperature of 400 • C in LPCS resulted in crack-free and thick coating formation with amorphous TiO 2 to the anatase phase transition. According to the literature [263][264][265][266][267][268] amorphous oxides, known as soft ceramics, are exhibiting remarkable plastic deformation at moderate temperatures.…”

Section: Lpcs Ceramic Coatings Applicationsmentioning

confidence: 99%

Advanced Functional Metal-Ceramic and Ceramic Coatings Deposited by Low-Pressure Cold Spraying: A Review

Winnicki

2021

Coatings

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Based on the recent analysis of various databases, cold spray (CS), the newest method among thermal spraying technologies, has received the unabated attention of hundreds of researchers continuously since its invention in the 1980s. The significance of CS lies in the low process temperature, which usually ensures compressive residual stresses and allows for the formation of coatings on a thermally sensitive substrate. This paper concerns the low-pressure cold spray (LPCS) variant employed for forming metal matrix composites (MMCs) with high ceramic contents and all-ceramic coatings. At the very beginning, the influence of LPCS process parameters on deposition efficiency (DE) is analysed. In the next part, the most useful feedstock powder preparation techniques for LCPS are presented. Due to the combination of bottom-up powder production methods (e.g., sol-gel (SG)) with LCPS, the metal matrix that works as a binder for ceramic particles in MMC coatings can be removed, resulting in all-ceramic coatings. Furthermore, with optimization of spraying parameters, it is possible to predict and control phase transformation in the feedstock material. Further in the paper, differences in the bonding mechanism of metal–ceramic mixtures and ceramic particles are presented. The properties and applications of various MMC and ceramic coatings are also discussed. Finally, the exemplary direction of CS development is suggested.

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Sol–gel fabrication and enhanced optical properties, photocatalysis, and surface wettability of nanostructured titanium dioxide films

Cited by 14 publications

References 28 publications

Structure and optical properties of TiO₂ thin films deposited by ALD method

Structure and optical properties of TiO₂ thin films deposited by ALD method

Optimization of the structural and optical properties of ALD grown ZnO thin films for photocatalytic applications: thickness dependence

Advanced Functional Metal-Ceramic and Ceramic Coatings Deposited by Low-Pressure Cold Spraying: A Review

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Sol–gel fabrication and enhanced optical properties, photocatalysis, and surface wettability of nanostructured titanium dioxide films

Cited by 14 publications

References 28 publications

Structure and optical properties of TiO2 thin films deposited by ALD method

Structure and optical properties of TiO2 thin films deposited by ALD method

Optimization of the structural and optical properties of ALD grown ZnO thin films for photocatalytic applications: thickness dependence

Advanced Functional Metal-Ceramic and Ceramic Coatings Deposited by Low-Pressure Cold Spraying: A Review

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Structure and optical properties of TiO₂ thin films deposited by ALD method

Structure and optical properties of TiO₂ thin films deposited by ALD method