Sol–gel synthesis of TiO2 nanostructured film on SiO2 pre-coated glass with a comparative study of solvent effect on the film properties

Alzamani, Mehdi; Eghdam, Ebrahim

doi:10.1007/s10971-016-4064-6

Cited by 10 publications

(5 citation statements)

References 59 publications

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“…Conversely, it was found that the composition of sol gel system was uniform with higher LIDT than those of vacuum physical coating generally [9][10][11][12][13][14][15][16]. Furthermore, the sol-gel technique had many advantages [17][18][19], it was easy to control and adjust the composition of optical coatings, the growth progress of particles and properties of the coatings such as mechanical and laser damage properties. It was generally believed that there were no macroscopic defects and microscopic atomic level defects in coating prepared by the sol-gel method.…”

Section: Introductionmentioning

confidence: 99%

Enhanced uniformity of zirconia coating for high power lasers via solvent replacement and PEG-doping

Hu,

Zhang,

et al. 2024

Preprint

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Zirconia coating has a lot of promise when it comes to enhancing the optical performance and laser-induced damage threshold (LIDT) of the mirror in laser systems. In this work, a high LIDT ZrO2 coating was created using the sol-gel spin coating technique. The anhydrous ethanol solvent was substituted with alcohol ether solvent, and the spin coating technique was employed to achieve a macro homogeneous and flawless ZrO2 coating. Additionally, organic polymer polyethylene glycol (average Mn 200, PEG200) doping was used to achieve the uniform ZrO2 coating with LIDT. ZrO2-PEG composite coatings with consistent LIDT and exceptional optical properties were created. Alcohol ether solvents helped the sol produce a more homogeneous gel coating on the substrate, as demonstrated by the ZrO2 coating microscope pictures. The LIDT with a 0.5 wt.% PEG200 content was the most uniform. PEG200 organic molecules were able to alter the link state of the ZrO2 particles. The macroscopic mechanical characteristics of the coatings revealed that the hardness and elastic modulus of the ZrO2-PEG composite coating were mostly influenced by the PEG200 content. When the PEG200 content was 0.3 wt.%, the hardness and elastic modulus of the ZrO2-PEG composite coating were the lowest with the highest of the LIDT at 39.25±3.13 J/cm2 (@ 1064 nm, 11 ns, 1 mm2).

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Section: Introductionmentioning

confidence: 99%

Enhanced uniformity of zirconia coating for high power lasers via solvent replacement and PEG-doping

Hu,

Zhang,

et al. 2024

Preprint

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“…So, studies on the optical and structural properties of thin films are important in technology. TiO 2 layers have interesting applications in the purification industry to keep surfaces clean through creating of photocatalytically active, selfcleaning surfaces [27]. Although nanoparticles provide larger effective surface area, their separation from the solution after reaction could be a challenging issue which is resolved by using nanoparticles in the form of thin films [28,29].…”

Section: Introductionmentioning

confidence: 99%

“…They studied the effect of layer thickness on the structural, electrical, optical and photocatalytic properties [31]. Among various techniques, the dip-coating method seems to be easy and better to control deposition parameters such as the thickness and number of coating layers [27].…”

Section: Introductionmentioning

confidence: 99%

“…Then, the transparency of the SiO 2 -TiO 2 layers is enumerated as another practical advantage. On the other hand, the super-hydrophilic property of the SiO 2 -TiO 2 layers brings the improvement of the photocatalytic performance and causes applications like anti-fog, self-cleaning, and removing the degraded products resulted from photocatalytic reactions [27].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced visible light photocatalytic activity of nanostructured SiO₂-TiO₂ thin films through optimizing thickness

Darvish,

Masoudi,

Mortezaali

et al. 2023

Phys. Scr.

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Thin films of silicon dioxide-titanium dioxide (SiO2-TiO2) with different thicknesses were deposited by a simple dip-coating method in a repetition behavior followed by heating processes. Choosing the optimum thickness is accounted as an approach for improving photocatalytic and hydrophilicity properties of a thin film. The obtained results from FESEM and AFM characterizations showed that with increasing thickness, the surface roughness increases from 3.089nm to 132.8nm. The XRD patterns indicate the presence of anatase phase for the SiO2-TiO2 thin film. Optical measurements were used to calculate thickness, generation rate of photocarriers, band gap, and refractive index of the samples. Decrease of band gap with increasing thickness makes the layer more proper for photocatalytic activity under visible light. It is obtained that the generation rate of carriers has the highest value (17.16×1024 m-3s-1) for the thickness of 336 nm. PL spectra for the thickness of 336 nm confirmed the presence of defects which reduce the recombination rate and improve charge carrier separation. XPS was used to distinguish the chemical composition. Variation of defect concentrations, number of grain boundaries, and surface roughness with thickness were considered as the main parameters affecting the photocatalytic performance. The highest photodegradation was obtained for 336 nm thick film under illumination of visible light (100% degradation of 40 ml solution of 10 mg/L methylene blue (MB)). This research provides a systematic study on the structural and optical properties of the different thick SiO2-TiO2 films with goal of enhancing photocatalytic activity in the visible light region.

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“…Therefore, MgF 2 coatings have a large number of applications in the preparation of optical coatings. Nowadays, most coating techniques, including vacuum evaporation and magnetron sputtering, are complicated and expensive [4,5]. However, this work presents a simple, low-cost, and environmentally friendly sol-gel wet chemical method for the preparation of MgF 2 coatings.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Porous MgF2 Coating by a Sol–Gel Method Accompanied by Phase Separation

Lin,

Wang,

et al. 2023

Coatings

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Surfaces with translucent and wear-resistant effects have a wide range of applications, especially as protective layers. In this work, a simple and convenient method for the preparation of porous magnesium fluoride (MgF2) coatings was proposed. Nano-porous MgF2 powder was prepared with sol–gel and phase separation methods by optimizing the polymer amount and used for the preparation of thick layers onto PVC substrates. The automated surface area and porosity analyzer (BET) and scanning electron microscopy (SEM) confirmed that the layers containing 0.028‰ PEO presented a 3D structure with pore sizes in the range of 16 nm. The layer reached 93% transmittance in the visible region, a Vickers hardness value of 2889.1 kg/mm2, and a friction coefficient of 0.2 in the wear test.

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Sol–gel synthesis of TiO2 nanostructured film on SiO2 pre-coated glass with a comparative study of solvent effect on the film properties

Cited by 10 publications

References 59 publications

Enhanced uniformity of zirconia coating for high power lasers via solvent replacement and PEG-doping

Enhanced uniformity of zirconia coating for high power lasers via solvent replacement and PEG-doping

Enhanced visible light photocatalytic activity of nanostructured SiO₂-TiO₂ thin films through optimizing thickness

Synthesis of Porous MgF2 Coating by a Sol–Gel Method Accompanied by Phase Separation

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Sol–gel synthesis of TiO2 nanostructured film on SiO2 pre-coated glass with a comparative study of solvent effect on the film properties

Cited by 10 publications

References 59 publications

Enhanced uniformity of zirconia coating for high power lasers via solvent replacement and PEG-doping

Enhanced uniformity of zirconia coating for high power lasers via solvent replacement and PEG-doping

Enhanced visible light photocatalytic activity of nanostructured SiO2-TiO2 thin films through optimizing thickness

Synthesis of Porous MgF2 Coating by a Sol–Gel Method Accompanied by Phase Separation

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Enhanced visible light photocatalytic activity of nanostructured SiO₂-TiO₂ thin films through optimizing thickness