TiO 2 Nanocrystals Decorated CVD Graphene Based Hybrid for UV-Light Active Photoanodes

Ingrosso, Chiara; Bianco, Giuseppe Valerio; Pifferi, V.; Guffanti, P.; Petronella, Francesca; Comparelli, Roberto; Agostiano, Angela; Striccoli, Marinella; Palchetti, Ilaria; Falciola, L.; Curri, Maria Lucia; Bruno, Giovanni

doi:10.1016/j.proeng.2016.11.180

Cited by 4 publications

(2 citation statements)

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“…The synthesis method, experimental settings, sol composition [13] and polymorph structure are just a few of the variables that affect the properties of TiO 2 nanoparticles [14,15]. Chemical vapor deposition (CVD) [16], radio frequency (RF) magnetron sputtering (SPS) [17], nebulized spray deposition [9] and the sol-gel procedure [18] are only some of the more common methods currently used to create anatase TiO 2 thin films. The sol-gel approach is the most appealing of the mentioned methods, due to the simplicity of the required equipment, low processing temperature, good homogeneity, and the ability to achieve multilayer deposition [19] on different substrates, including metals [20], indium-doped tin oxide (ITO) [21] or fluorine-doped tin oxide (FTO) glass [9], depending on the application area.…”

Section: Introductionmentioning

confidence: 99%

Titanium Dioxide Thin Films Produced on FTO Substrate Using the Sol–Gel Process: The Effect of the Dispersant on Optical, Surface and Electrochemical Features

et al. 2023

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In this study, TiO2 thin films formed by dip-coating on an FTO substrate were obtained and characterized using surface, optical and electrochemical techniques. The impact of the dispersant (polyethylene glycol-PEG) on the surface (morphology, wettability, surface energy), optical (band gap and Urbach energy) and electrochemical (charge-transfer resistance, flat band potential) properties were investigated. When PEG was added to the sol–gel solution, the optical gap energy of the resultant films was reduced from 3.25 to 3.12 eV, and the Urbach energy increased from 646 to 709 meV. The dispersant addition in the sol–gel process influences surface features, as evidenced by lower contact-angle values and higher surface energy achieved for a compact film with a homogenous nanoparticle structure and larger crystallinity size. Electrochemical measurements (cycle voltammetry, electrochemical impedance spectroscopy and the Mott–Schottky technique) revealed improved catalytic properties of the TiO2 film, due to a higher insertion/extraction rate of protons into the TiO2 nanostructure, as well as a decrease in charge-transfer resistance from 418 k to 23.4 k and a decrease in flat band potential from 0.055 eV to −0.019 eV. The obtained TiO2 films are a promising alternative for technological applications, due to their advantageous surface, optical and electrochemical features.

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Section: Introductionmentioning

confidence: 99%

Titanium Dioxide Thin Films Produced on FTO Substrate Using the Sol–Gel Process: The Effect of the Dispersant on Optical, Surface and Electrochemical Features

et al. 2023

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“…Conventional technique can be achieved to the fabrications of titanium dioxide films including, ultrasonic spray pyrolysis, 21 radio frequency (RF) magnetron sputtering, 22 chemical vapor deposition (CVD), 23 pulsed laser deposition (PLD) 24 and sol-gel process. 25 Among these methods, sol-gel method offers several advantages including simplicity of equipment and ease of implementation of the material, low energy cost, high purity and better homogeneity of the material, and realization of multi-component deposits in a single operation.…”

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Dependence of the Physical Properties of Titanium Dioxide (TiO₂) Thin Films Grown by Sol-Gel (Spin-Coating) Process on Thickness

Fatma

Attaf

Derbali

et al. 2022

ECS J. Solid State Sci. Technol.

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In this work, high transparent TiO2 nano-crystallinethin films have been prepared by a simple sol–gel spin coating technique.The effect of the number of layers on physical properties of TiO2 thin films were studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Vis spectrophotometer, and four probes measurement.The XRD analysis confirms that TiO2 has anatase phase structure with preferred orientation of (101) direction, while the crystallite size values varied with the number of layers in the range of 16-19 nm. The films exhibit high optical transparency (>70%), reaching a maximum of 85% in the visible region with the red-shifted absorption edge, suggesting the films optical gap energy decreases with an increasing number of layers from 3.67 to 3.52 eV. However, the FTIR reflectance spectra show the existence of functional groups and chemical bonding.The films' electrical properties measurement indicated substantial enhancement in the resistivity with an increasing in the number of layers from3.3×105 to 2.15×106 Ω.cm. This study indicates that TiO2 films may be a potential candidate for technological applications as solar cells, photocatalysts, and gas sensors due to their desired structural, optical, and electrical properties.

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Dip coated TiO2 based metal-semiconductor-metal ultraviolet photodetector for UV A monitoring

Kumbhar

Shevate

Patil

et al. 2020

Superlattices and Microstructures

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TiO 2 Nanocrystals Decorated CVD Graphene Based Hybrid for UV-Light Active Photoanodes

Cited by 4 publications

References 12 publications

Titanium Dioxide Thin Films Produced on FTO Substrate Using the Sol–Gel Process: The Effect of the Dispersant on Optical, Surface and Electrochemical Features

Titanium Dioxide Thin Films Produced on FTO Substrate Using the Sol–Gel Process: The Effect of the Dispersant on Optical, Surface and Electrochemical Features

Dependence of the Physical Properties of Titanium Dioxide (TiO₂) Thin Films Grown by Sol-Gel (Spin-Coating) Process on Thickness

Dip coated TiO2 based metal-semiconductor-metal ultraviolet photodetector for UV A monitoring

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TiO 2 Nanocrystals Decorated CVD Graphene Based Hybrid for UV-Light Active Photoanodes

Cited by 4 publications

References 12 publications

Titanium Dioxide Thin Films Produced on FTO Substrate Using the Sol–Gel Process: The Effect of the Dispersant on Optical, Surface and Electrochemical Features

Titanium Dioxide Thin Films Produced on FTO Substrate Using the Sol–Gel Process: The Effect of the Dispersant on Optical, Surface and Electrochemical Features

Dependence of the Physical Properties of Titanium Dioxide (TiO2) Thin Films Grown by Sol-Gel (Spin-Coating) Process on Thickness

Dip coated TiO2 based metal-semiconductor-metal ultraviolet photodetector for UV A monitoring

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Product

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Dependence of the Physical Properties of Titanium Dioxide (TiO₂) Thin Films Grown by Sol-Gel (Spin-Coating) Process on Thickness