Transparent nanostructured Fe-doped TiO<sub>2</sub> thin films prepared by ultrasonic assisted spray pyrolysis technique

Rasoulnezhad, Hossein; Hosseinzadeh, Ghader; Ghasemian, Naser; Hosseinzadeh, Reza; Keihan, Amir Homayoun

doi:10.1088/2053-1591/aabe5e

Cited by 20 publications

(20 citation statements)

References 46 publications

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“…This result is in line with other reports, for instance, Rasoulnezhad et al . [57] did not report additional signals corresponding to the presence of doped elements into XRD patterns for TiO 2 samples doped with S and Fe. The characteristic peak of GO cannot be appreciated due to the low concentration of GO used in the synthesis of the materials, which is in agreement with other reports on GO and TiO 2 composites synthesis [58,59].…”

Section: Resultsmentioning

confidence: 99%

“…Rasoulnezhad et al . [97] reported a k app value of 7.3 × 10 −3 min −1 for photocatalytic degradation of MB after 300 min under visible light irradiation using Fe-doped TiO 2 thin films as photocatalyst. In another study, Yang et al [98] reported a k app value of 3.3 × 10 −3 min −1 for photocatalytic degradation of MB after 180 min using poly- o -phenylenediamine-modified TiO 2 nanocomposites as photocatalysts.…”

Section: Resultsmentioning

confidence: 99%

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Photocatalytic activity of graphene oxide–TiO ₂ thin films sensitized by natural dyes extracted from Bactris guineensis

et al. 2019

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This study synthesized and characterized composites of graphene oxide and TiO 2 (GO–TiO 2 ). GO–TiO 2 thin films were deposited using the doctor blade technique. Subsequently, the thin films were sensitized with a natural dye extracted from a Colombian source ( Bactris guineensis ). Thermogravimetric analysis, X-ray diffraction, Raman spectroscopy, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance measurements were used for physico-chemical characterization. All the samples were polycrystalline in nature, and the diffraction signals corresponded to the TiO 2 anatase crystalline phase. Raman spectroscopy and Fourier transform infrared spectroscopy (FTIR) verified the synthesis of composite thin films, and the SEM analysis confirmed the TiO 2 films morphological modification after the process of GO incorporation and sensitization. XPS results suggested a possibility of appearance of titanium (III) through the formation of oxygen vacancies (O v ). Furthermore, the optical results indicated that the presence of the natural sensitizer and GO improved the optical properties of TiO 2 in the visible range. Finally, the photocatalytic degradation of methylene blue was studied under visible irradiation in aqueous solution, and pseudo-first-order model was used to obtain kinetic information about photocatalytic degradation. These results indicated that the presence of GO has an important synergistic effect in conjunction with the natural sensitizer, reaching a photocatalytic yield of 33%.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Photocatalytic activity of graphene oxide–TiO ₂ thin films sensitized by natural dyes extracted from Bactris guineensis

et al. 2019

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“…Among the above-mentioned methods, deposition of thin films with ultrasonic spray pyrolysis has the advantage of being a simple, inexpensive method that allows us to obtain transparent homogeneous films with high stability and quality. This method could be easily applied at the laboratory scale as well as in industry for film deposition on large surfaces [12,13]. Our research group is focused on gas-phase photocatalytic oxidation on TiO 2 thin films prepared by the spray pyrolysis technique.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

et al. 2019

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TiO2 thin films with different titanium isopropoxide (TTIP):acetylacetone (AcacH) molar ratios in solution were prepared by the chemical spray pyrolysis method. The TTIP:AcacH molar ratio in spray solution varied from 1:3 to 1:20. TiO2 films were deposited onto the glass substrates at 350 °C and heat-treated at 500 °C. The morphology, structure, surface chemical composition, and photocatalytic activity of the obtained TiO2 films were investigated. TiO2 films showed a transparency of ca 80% in the visible spectral region and a band gap of ca 3.4 eV irrespective of the TTIP:AcacH molar ratio in the spray solution. TiO2 films consist of the anatase crystalline phase with a mean crystallite size in the range of 30–40 nm. Self-cleaning properties of the films were estimated using the stearic acid (SA) test. A thin layer of 8.8-mM SA solution was spin-coated onto the TiO2 film. The degradation rate of SA as a function of irradiation time was monitored by Fourier-transform infrared spectroscopy (FTIR). An increase in the TTIP:AcacH molar ratio from 1:4 to 1:8 resulted in a ten-fold increase in the photodegradation reaction rate constant (from 0.02 to the 0.2 min−1) under ultraviolet light and in a four-fold increase under visible light.

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“…[18] prepared TiO 2 and N-doped TiO 2 thin films, and Rasoulnezhad et al . [19] deposited TiO 2 and Fe-doped TiO 2 thin films on glass substrates by ultrasonic spray pyrolysis. The photocatalytic activity of coatings was studied by the degradation of methylene blue in aqueous phase under UV or visible light.…”

Section: Introductionmentioning

confidence: 99%

TiO ₂ thin films by ultrasonic spray pyrolysis as photocatalytic material for air purification

et al. 2019

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In this study, we showed that the TiO 2 thin films deposited onto window glass are practicable for air purification and self-cleaning applications. TiO 2 films were deposited onto window glass by ultrasonic spray pyrolysis method. Different deposition temperatures were used in the range of 250–450°C. The structural, morphological, optical properties and surface chemical composition were investigated to understand probable factors affecting photocatalytic performance and wettability of the TiO 2 thin films. The TiO 2 thin films were smooth, compacted and adhered adequately on the substrate with a thickness in the range of 100–240 nm. X-ray diffraction patterns revealed that all the TiO 2 thin films consisted of anatase phase structure with the mean crystallite size in the range of 13–35 nm. The optical measurements showed that the deposited films were highly transparent (approx. 85%). The wettability test results showed that the TiO 2 thin films sprayed at 350°C and 450°C and annealed at 500°C for 1 h were superhydrophilic. The photocatalytic activity of the films was tested for the degradation of methyl tert-butyl ether (MTBE) in multi-section plug-flow reactor. The TiO 2 film deposited at 350°C exhibited the highest amount of conversion of MTBE, approximately 80%.

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Transparent nanostructured Fe-doped TiO₂ thin films prepared by ultrasonic assisted spray pyrolysis technique

Cited by 20 publications

References 46 publications

Photocatalytic activity of graphene oxide–TiO ₂ thin films sensitized by natural dyes extracted from Bactris guineensis

Photocatalytic activity of graphene oxide–TiO ₂ thin films sensitized by natural dyes extracted from Bactris guineensis

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

TiO ₂ thin films by ultrasonic spray pyrolysis as photocatalytic material for air purification

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Transparent nanostructured Fe-doped TiO2 thin films prepared by ultrasonic assisted spray pyrolysis technique

Cited by 20 publications

References 46 publications

Photocatalytic activity of graphene oxide–TiO 2 thin films sensitized by natural dyes extracted from Bactris guineensis

Photocatalytic activity of graphene oxide–TiO 2 thin films sensitized by natural dyes extracted from Bactris guineensis

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

TiO 2 thin films by ultrasonic spray pyrolysis as photocatalytic material for air purification

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Transparent nanostructured Fe-doped TiO₂ thin films prepared by ultrasonic assisted spray pyrolysis technique

Photocatalytic activity of graphene oxide–TiO ₂ thin films sensitized by natural dyes extracted from Bactris guineensis

Photocatalytic activity of graphene oxide–TiO ₂ thin films sensitized by natural dyes extracted from Bactris guineensis

TiO ₂ thin films by ultrasonic spray pyrolysis as photocatalytic material for air purification