Influence of Al2O3:TiO2 ratio on the structural and optical properties of TiO2–Al2O3 nano-composite films produced by sol gel method

Arıer, Ümit Özlem Akkaya; Tepehan, Fatma Z.

doi:10.1016/j.compositesb.2013.10.023

Cited by 43 publications

(9 citation statements)

References 22 publications

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“…The XRD results show that none of peaks related to alumina crystal phase is observed in sample S2, S3, S4 until the calcination temperature reaches 700 °C (JCPDS file no. 10–0173), which is ascribed to the high temperature (>700 °C) necessary for alumina crystallization 28 . The average Al-TiO 2 crystallite size was calculated from the line broadening of corresponding reflections according to Scherrer’s equation 47 where D is the average crystallite size (nm), λ is the wavelength of the X-ray radiation, k is a constant taken as 0.9, β is the full width at half maximum intensity, and θ is the half diffraction angle.…”

Section: Resultsmentioning

confidence: 99%

“…Inspired from the thermal, chemical and mechanical stability and excellent thermal expansion performance of Al-TiO 2 nano-composite materials, doping of aluminum into TiO 2 has also been investigated by some researchers 24, 25 . Al-TiO 2 structures are used in various applications including catalysis, solar cells 26 , and self-cleaning 27, 28 . Zhang et al .…”

Section: Introductionmentioning

confidence: 99%

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Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Luo

Wang²,

Liu

et al. 2017

Sci Rep

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Three kinds of Al-TiO2 samples and pure TiO2 samples were synthesized via a modified polyacrylamide gel route using different aluminum salts, including Al2(SO4)3∙18H2O, AlCl3, and Al(NO3)3∙9H2O under identical conditions. The influence of different aluminum salts on the phase purity, morphologies, thermal stability of anatase and photocatalytic properties of the as-prepared Al-TiO2 nanoparticles were studied. The energy gap (Eg) of Al-TiO2 nanoparticles decreases due to Al ion doping into TiO2. The photocatalytic activities of the Al-TiO2 samples were investigated by the degradation of acid orange 7 dye in aqueous solution under simulated solar irradiation. The Al-TiO2 nanoparticles prepared from Al(NO3)3∙9H2O exhibit the best photocatalytic activity among the four kinds of samples, followed in turn by the Al-TiO2 nanoparticles prepared with AlCl3, Al2(SO4)3∙18H2O and pure TiO2. The different performances are attributed to complex effects of Eg, particle size, surface morphology, phase purity and the defect sites of the Al-TiO2 nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Luo

Wang²,

Liu

et al. 2017

Sci Rep

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“…[ 27 ] Unfortunately, the value of T decreases when the Al 2 O 3 content is further increased (x = 40%–50%), explained by the higher light scattering of the NCTFs due to an increase in roughness of the surface or the formation of agglomerates/clusters. [ 28,29 ] It is worth noticing that the highest transmittance of 90.9% obtained for the TiO 2 ‐SiO 2 ‐30%Al 2 O 3 NCTF is comparable to the maximum value of 90.68% of the uncoated glass substrate.…”

Section: Resultsmentioning

confidence: 82%

“…[ 24 ] It is also noticed in Figure 6A that the absorption band shows a shift toward the short‐wavelength side when the Al 2 O 3 content increases, possibly explained by the interaction between TiO 2 ‐SiO 2 composite and Al 2 O 3 component to form Si‐O‐Ti‐O‐Al bonding. [ 17,26,28–30 ]…”

Section: Resultsmentioning

confidence: 99%

High transmittance and excellent hardness TiO₂‐SiO₂‐Al₂O₃ nanocomposite thin film for anti‐scratch surface applications

et al. 2022

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In this work, TiO2‐SiO2‐x%Al2O3 (x = 0–50) nanocomposite thin films (NCTFs) with high purity, relatively homogeneity, high transmittance, excellent hardness, and crack‐free were synthesized successfully by a spin‐coating technique. It was demonstrated that the transmittance and the hardness of TiO2‐SiO2‐x%Al2O3 NCTFs are strongly affected by the Al2O3 content. The highest transmittance of 90.9% in the visible region (400 to 800 nm) and the excellent hardness and scratch resistance with a maximum hardness value of 7 Mohs and 11.8 GPa of nanoindentation and a critical scratch load of 47.6 mN for the TiO2‐SiO2‐30%Al2O3 NCTF annealed at 500°C in the air for 3 h was achieved. A hardness enhancement mechanism was proposed and discussed in detail. The obtained results show that the fabricated TiO2‐SiO2‐Al2O3 NCTFs have a great potential for anti‐scratch resistance surface applications.

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“…For an initial concentration of 200 mg/L RB5 solution, Al 2 O 3 @TiO 2 with 6 mL dose of TBOT could eliminate dyes absolutely. Different Al 2 O 3 :TiO 2 volume ratio did not change TiO 2 phase . Therefore, this addition of TBOT was used in later preparation of Al 2 O 3 @TiO 2 sorbent.…”

Section: Resultsmentioning

confidence: 99%

Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites

Deng

Zhang

Cao

et al. 2018

Env Prog and Sustain Energy

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In this study, mesoporous Al2O3@TiO2 nanocomposites were synthesized via two successive precipitation methods. Due to the coated TiO2 layer, the Al2O3@TiO2 exhibited a significantly enhanced efficiency for the removal of reactive black 5 dye (RB5). The morphology and compositional characteristics of Al2O3@TiO2 were investigated by TEM, HRTEM, XRD, EDS, FTIR, BET, and zeta‐potential analysis. TEM photos illustrated that TiO2 film covered Al2O3, XRD suggested compositional phases of γ‐Al2O3 and anatase TiO2, and BET measurement confirmed its characteristic of the mesoporous material. Al2O3@TiO2 was applied as an adsorbent to remove RB5 from aqueous solution, and the adsorption isotherms fitted well to the Langmuir isotherm model. The photocatalysis experiments confirmed that Al2O3@TiO2 had the good photocatalytic performance for degrading RB5 and the hydroxyl radical was the major active group. The UV–Vis adsorbance spectra demonstrated that this Al2O3@TiO2 could incompletely degrade RB5 dye under natural indoor light simultaneously when adsorption occurred. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S230–S242, 2019

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Influence of Al2O3:TiO2 ratio on the structural and optical properties of TiO2–Al2O3 nano-composite films produced by sol gel method

Cited by 43 publications

References 22 publications

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

High transmittance and excellent hardness TiO₂‐SiO₂‐Al₂O₃ nanocomposite thin film for anti‐scratch surface applications

Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites

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Influence of Al2O3:TiO2 ratio on the structural and optical properties of TiO2–Al2O3 nano-composite films produced by sol gel method

Cited by 43 publications

References 22 publications

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

Influence of different aluminum salts on the photocatalytic properties of Al doped TiO2 nanoparticles towards the degradation of AO7 dye

High transmittance and excellent hardness TiO2‐SiO2‐Al2O3 nanocomposite thin film for anti‐scratch surface applications

Decolorization of Reactive Black 5 by Mesoporous Al2O3@TiO2 Nanocomposites

Contact Info

Product

Resources

About

High transmittance and excellent hardness TiO₂‐SiO₂‐Al₂O₃ nanocomposite thin film for anti‐scratch surface applications

Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites