Effect of nitrogen-doping and post annealing on wettability and band gap energy of TiO2 thin film

Sun, Zheng; Пичугин, В. Ф.; Evdokimov, K. E.; Konishchev, Maksim E; Сыртанов, М. С.; Kudiiarov, Viktor N.; Ke, Li; Tverdokhlebov, S. I.

doi:10.1016/j.apsusc.2019.144048

Cited by 48 publications

(21 citation statements)

References 72 publications

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“…As it is well known, anatase-rutile binary systems perform better in photocatalytic processes in terms of efficiency, compared to the case when only one of these isolated components is used [43]. So, there is an extensive range of band gap values presented in the scientific literature for TiO 2 resulting from the combination of rutile and anatase phases.…”

Section: Application Of K-m Function and Tauc Plot To Determine The Band Gap Energymentioning

confidence: 99%

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Landi

Segundo

Freitas

et al. 2022

Solid State Communications

241

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Section: Application Of K-m Function and Tauc Plot To Determine The Band Gap Energymentioning

confidence: 99%

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Landi

Segundo

Freitas

et al. 2022

Solid State Communications

241

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“…First, the rapid recombination of photoelectron-hole pairs in TiO 2 reduces photocatalytic performance [ 17 ]. Second, it has large bandgap energy [ 18 ]. This means it requires a photon with a wavelength in the ultraviolet (UV) region for electron-hole pair production.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

et al. 2022

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A p-n nanocomposite based on TiO2 nanotubes (NTs) and NiO nanoparticles (NPs) was designed and optimized in this study to improve the photocatalytic performance of methylene blue (MB). The hydrothermal technique has been used to produce TiO2/NiO nanocomposites with different NiO NPs weight ratios; 1TiO2:1NiO, 1TiO2:2NiO, and 1TiO2:3NiO. The crystal phase, chemical composition, optical properties, and morphology of TiO2/NiO were explored by various techniques. TiO2 NTs have a monoclinic structure, while NiO NPs have a cubic structure, according to the structural study. The bandgap of TiO2 NTs was reduced from 3.54 eV to 2.69 eV after controlling the NiO NPs weight ratio. The TiO2/2NiO nanocomposite showed the best photodegradation efficiency. Within 45 min of solar light irradiation, the efficiency of MB dye degradation using TiO2/2NiO hits 99.5% versus 73% using pure TiO2 NTs. Furthermore, the catalytic photodegradation efficiency did not deteriorate significantly even after five reusability cycles, intimating the high stability of the TiO2/2NiO nanocomposite. This suggests that the loading of NiO NPs into TiO2 NTs lowers the recombination of photo-produced electron/hole pairs and enlarged solar spectral response range, which results in improved photocatalytic activity. The mechanism of charge transfer in the TiO2/NiO and kinetic models were discussed for the photodegradation of MB.

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“…49−51 The Raman shift could be caused by residual stress. 52 In our study, the residual stress may be caused by the expansion of TiO 2 lattice during the doping process, leading to the shift of the E g(1) peak. 53 To understand the effect of reaction temperature on the phase composition of the F−W codoped TiO 2 , XRD patterns of F−W codoped TiO 2 with F/Ti (mol) = 0.3 and W/Ti (mol) = 0.2 synthesized at different reaction temperatures were analyzed.…”

Section: ■ Results and Discussionmentioning

confidence: 63%

Expanding the Spectral Tunability of TiO₂ Nanocrystals by Codoping with Fluorine and Tungsten for Energy-Efficient Windows

Zhou

Gao

2022

ACS Sustainable Chem. Eng.

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Exploitation of new solar blocking materials is crucial for low-carbon architectures. F–W codoped TiO2 with superior solar screening performance was prepared. The effects of codoping and reaction temperature on the composition and infrared screening performances of TiO2 nanoparticles were studied. Codoping with W and F produced spindle-shaped anatase TiO2 with a particle size of 7.7 nm. Tungsten substituted for titanium and fluorine substituted for oxygen in the lattices. XPS and EPR analyses verified the existence of abundant Ti3+ ions in the codoped TiO2. It was observed that the codoped TiO2 showed the strongest infrared blocking activity in comparison to the F-doped and undoped TiO2. The NIR screening efficiency of the coatings reaches 70.1% after codoping with 20% of tungsten and 30% of fluorine. Briefly, the enhanced NIR blockage activity of codoped TiO2 was the synergistic effect of F and W. The codoping of F and W increased the electron concentration in TiO2 and enhanced the NIR plasmonic absorption. Furthermore, the F–W codoped TiO2 films reduced the indoor temperature of the simulated house by 9.9 °C. Thus, the F–W codoped TiO2 films have potential applications in the field of energy-saving glazing.

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Effect of nitrogen-doping and post annealing on wettability and band gap energy of TiO2 thin film

Cited by 48 publications

References 72 publications

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

Expanding the Spectral Tunability of TiO₂ Nanocrystals by Codoping with Fluorine and Tungsten for Energy-Efficient Windows

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Effect of nitrogen-doping and post annealing on wettability and band gap energy of TiO2 thin film

Cited by 48 publications

References 72 publications

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Fabrication of TiO2/NiO p-n Nanocomposite for Enhancement Dye Photodegradation under Solar Radiation

Expanding the Spectral Tunability of TiO2 Nanocrystals by Codoping with Fluorine and Tungsten for Energy-Efficient Windows

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Product

Resources

About

Expanding the Spectral Tunability of TiO₂ Nanocrystals by Codoping with Fluorine and Tungsten for Energy-Efficient Windows