Surface and photocatalytic properties of TiO2 thin films prepared by non-aqueous surfactant assisted sol-gel method

Pala, Laxmi Prasad Rao; Uday, Vikram; Gogoi, Devipriya; Peela, Nageswara Rao

doi:10.1016/j.jece.2020.104267

Cited by 18 publications

(9 citation statements)

References 58 publications

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“…From figure 3, Raman spectroscopy confirmed the crystallinity of pure and Mg-TiO 2 films. The Raman spectra of pure, 2.5 Wt.% and 5 Wt.% Mg-TiO 2 films showed peaks attributed to the anatase TiO 2 phase at 144, 196, 398, 519, and 636 cm −1 , in agreement with the literature [43]. After Mg doping, Raman scattering was weak, and peak intensity was significantly reduced, indicating successful Mg doping into the TiO 2 lattice.…”

Section: Lattice Micro Stainsupporting

confidence: 88%

Synergistic effects of Mg doping on TiO₂ for improved toxic gas sensing performance at room temperature

Rajkumar,

Umamahesvari,

Nagaraju

2023

J. Phys.: Condens. Matter

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The gas sensing characteristics of magnesium (Mg)-doped titanium dioxide (TiO2) films were investigated using a spray pyrolysis method. Thin films with varying Mg doping concentrations (0, 2.5, and 5 weight percentages) were deposited and tested for their gas detection ability to organic compounds such as ethanol, butanol, toluene, xylene, and formaldehyde at room temperature (RT). Results disclosed that introducing Mg into TiO2 enhanced the gas sensing characteristics, particularly for formaldehyde. Mg doped TiO2 film enhanced the change in electrical resistance during gas adsorption, leading to an increased response in formaldehyde detection. Additionally, the structural, topographical, and optical characteristics of Mg-TiO2 films were examined. The findings suggest that Mg doping can significantly enhance the gas-sensing features of TiO2 films, making them promising candidates for gas-sensing applications.

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Section: Lattice Micro Stainsupporting

confidence: 88%

Synergistic effects of Mg doping on TiO₂ for improved toxic gas sensing performance at room temperature

Rajkumar,

Umamahesvari,

Nagaraju

2023

J. Phys.: Condens. Matter

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“…The optimum concentrations of the reagents used in the preparation of TiO 2 sol−gel to achieve uniform and adherent coatings were obtained through a detailed study in our previous work. 27 In brief, the TiO 2 sol was prepared by sequentially adding 0.03 g of AA, 0.05 g of AcAc, 0.28 g of TTIP, and 0.12 g of CTAB to 3.52 g of ethanol in a beaker under vigorous stirring, and stirring was continued for another 20 h at 600 rpm. The TiO 2 precipitation did not occur during the solution preparation.…”

Section: Experimental Methodsmentioning

confidence: 99%

Green Hydrogen Production in an Optofluidic Planar Microreactor via Photocatalytic Water Splitting under Visible/Simulated Sunlight Irradiation

Pala

Peela

2021

Energy Fuels

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The visible light-active Pt/TiO2 photocatalyst thin films were prepared by photo-depositing Pt onto the sol–gel TiO2 spin-coated films. An optofluidic planar microreactor was fabricated using a Pt/TiO2 film-coated glass substrate as the bottom plate and an uncoated glass substrate containing a planar reaction chamber as the cover plate. The Pt/TiO2 thin films were tested for the photocatalytic water splitting activity in the presence of methanol as the sacrificial agent to produce hydrogen under visible/solar light irradiation. The effect of catalyst film thickness, reactant flow rate, light intensity, and type of light source on the rate of hydrogen production was studied. The Pt/TiO2 film with a thickness of 1650 ± 119 nm showed a highest rate of 16.35 mmol h–1 g–1 (4.7 μmol h–1 cm–2) hydrogen production at an optimum reactant flow rate of 0.3 mL min–1 under visible light (400 W metal halide lamp) irradiation. The stability study carried out for four cycles of 5 h runs proved that the photocatalyst was stable and the film was well adhered to the glass substrate. A hydrogen production rate of 0.766 mmol h–1 g–1 (0.22 μmol h–1 cm–2) and a solar to hydrogen conversion efficiency of 0.015% were obtained under a simulated solar light irradiation of ∼100 mW cm–2 intensity, proving the solar light activity of the Pt/TiO2 film.

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“…The crystal size was calculated theoretically with the Scherrer equation 1, using the (101) peak [6]: Table 1 contains the thicknesses obtained by profilometry and theoretical crystal size of the TiO2 films where with increasing temperatures the crystallite size increases and the thickness decreases. Figure 3 shows the Raman spectra of the TiO2 films these spectrums present vibrational modes at Eg (144 cm -1 , 197 cm -1 , and 638 cm -1 ), B1g (399 cm -1 and 519 cm -1 ), A1g (519 cm -1 ) confirming the presence of TiO2 anatase phase [9], with the increase of temperature the vibrational modes increase their intensity. The vibrational mode with the highest intensity is Eg(144 cm -1 ) which is related to a particle size smaller than 40 nm and is confirmed by the calculated grain size of the preferential plane (101) [10].…”

Section: Resultsmentioning

confidence: 79%

Electrical properties of TiO₂ films synthetized by sol-gel process

Argüelles-Lucho,

Pérez-Cuapio,

Montes de Oca-Mora

et al. 2024

J. Phys.: Conf. Ser.

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Titanium oxide (TiO2) is one of the most used metal oxides for its multiple applications due to its high sensitivity, fast response, low cost, no toxicity and used in hostile environments. In this work was deposited TiO2 film on 304 stainless steel substrates using the spin coating technique. The synthesis of the deposited solution was with the sol-gel method a temperature environment, obtained TiO2 films on different thermal treatments. The results of the experiment show film: with a thickness from 0.6 to 1μm, anatase phase at the plane (101). The Raman spectroscopy confirms the TiO2 anatase phase. The resistivity decreases, and conductivity increases with increasing temperature. The micrograph SEM observes a compact and smooth homogeneous surface with an average size of 18.40nm to 7nm.

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Surface and photocatalytic properties of TiO2 thin films prepared by non-aqueous surfactant assisted sol-gel method

Cited by 18 publications

References 58 publications

Synergistic effects of Mg doping on TiO₂ for improved toxic gas sensing performance at room temperature

Synergistic effects of Mg doping on TiO₂ for improved toxic gas sensing performance at room temperature

Green Hydrogen Production in an Optofluidic Planar Microreactor via Photocatalytic Water Splitting under Visible/Simulated Sunlight Irradiation

Electrical properties of TiO₂ films synthetized by sol-gel process

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Surface and photocatalytic properties of TiO2 thin films prepared by non-aqueous surfactant assisted sol-gel method

Cited by 18 publications

References 58 publications

Synergistic effects of Mg doping on TiO2 for improved toxic gas sensing performance at room temperature

Synergistic effects of Mg doping on TiO2 for improved toxic gas sensing performance at room temperature

Green Hydrogen Production in an Optofluidic Planar Microreactor via Photocatalytic Water Splitting under Visible/Simulated Sunlight Irradiation

Electrical properties of TiO2 films synthetized by sol-gel process

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Synergistic effects of Mg doping on TiO₂ for improved toxic gas sensing performance at room temperature

Synergistic effects of Mg doping on TiO₂ for improved toxic gas sensing performance at room temperature

Electrical properties of TiO₂ films synthetized by sol-gel process