Tuning the optical bandgap of TiO2-TiN composite films as photocatalyst in the visible light

Xie, Zheng; Liu, Xiangxuan; Zhan, Peng; Wang, Weipeng; Zhang, Zhengjun

doi:10.1063/1.4812702

Cited by 36 publications

(20 citation statements)

References 40 publications

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“…The first band gap can be attributed to the presence of the titanium oxide phase in all of the samples as confirmed by the FT-IR spectroscopy, and the second one corresponds to T iN phase. A band gap tuning has been down in T iO 2 − T iN nanocomposites in the range of 1.68 -3.23 eV, which are the values near the energies obtained in Figure 9 [53].…”

Section: Determination Of the Band Gapsupporting

confidence: 75%

Influence of Preparation Method on the Structural, Linear and Nonlinear Optical Properties of TiN Nanoparticles

Safa

Rajabi

Ardyanian

2021

Preprint

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In this paper, titanium nitride nanoparticles were prepared in three methods, In the first method, titanium nitride nanoparticles were prepared by the Ball-mill method; in the second and third methods, the nanoparticles were synthesized by the sol-gel, and the co-precipitation methods. The samples were characterized by X-ray diffraction (XRD), UV-Vis spectroscopy, and scanning electron microscopy (SEM), for the study of structural, linear optical properties, and surface morphology study, respectively. The Z-scan technique was utilized to study the TiN nanoparticles nonlinearity. A change in nonlinear optical behavior with an increase in input pump power and concentration of the TiN nanoparticles was observed. Results showed that the TiN nanoparticles give new potentials in nonlinear optical applications. The nonlinear optical behavior of the TiN nanoparticles shifts from inverse saturation absorption to saturation absorption with increase of intensity.

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Section: Determination Of the Band Gapsupporting

confidence: 75%

Influence of Preparation Method on the Structural, Linear and Nonlinear Optical Properties of TiN Nanoparticles

Safa

Rajabi

Ardyanian

2021

Preprint

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“…However, these values are slightly higher than that those reported in literature (E g~1 .23-1.45 eV) [25,43]. The crystallization of secondary phases having higher band gap values than that of the CMTS phase explain the higher observed band gap energy range of the films deposited from 280 to 360 • C. Indeed, the possibility to tune the optical band gap as a function of the proportion of phases in composite film has already been reported [44]. Nie et al have also observed an increase of the band gap energy in CMTS films due to the crystallization of sulfide impurity which exhibits a band gap energy of about 2 eV as deposited [16].…”

Section: Electrical Characterizationmentioning

confidence: 65%

Growth and Characterization of Cu2MnSnS4 Thin Films Synthesized by Spray Pyrolysis under Air Atmosphere

et al. 2020

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The direct synthesis of chalcopyrite Cu2MnSnS4 (CMTS) thin films by a spray pyrolysis technique on glass substrates under oxidative conditions (ambient atmosphere and using compressed air as a carrier gas instead of nitrogen) was studied. The effect of the deposition temperature on the structural, chemical composition, and optical and electrical properties of thin films has been assessed. X-ray diffraction study reveals that the tetragonal stannite structure crystallizes with a [112] preferential orientation from 280 up to 360 °C, with its crystallinity correlated with the substrate temperature. However, in addition to its crystallization, traces of secondary phases are observed: a mixture of SnO and CuO at 360 °C prevails on the formation of CuS at 320 °C. Above 360 °C, the oxidant conditions combined with the loss in sulfur lead to the crystallization of only the tenorite CuO. The crystallization of sulfides by spray pyrolysis under air is possible only at relatively low deposition temperature for which the oxidation rate is inefficient compared to the sulfidation rate. Further optical studies of stannite films indicate a high absorption coefficient toward the visible range (>104 cm−1) and an optical band gap of about 1.64–1.85 eV, also depending on the substrate temperature. The CMTS thin films deposited below 360 °C exhibit a moderate electrical resistivity of about Ω·cm at room temperature. The properties of the stannite films synthesized using a spray pyrolysis technique in ambient air are comparable to those of films obtained by spray pyrolysis with nitrogen carrier gas despite the presence of oxides traces, an increase in the deposition temperature improving the microstructure, and its related optical and electrical properties.

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“…The lattice spacing was measured using Gatan Micrograph Suite ® software. The measured lattice spacing of 0.21 nm corresponds to the spacing between (200) planes of TiN, whereas the lattice spacing of 0.35 nm corresponds to the spacing between the (101) planes of anatase TiO 2 [ 41 ].…”

Section: Figurementioning

confidence: 99%

Titanium Nitride Nanodonuts Synthesized from Natural Ilmenite Ore as a Novel and Efficient Thermoplasmonic Material

Nguyen

et al. 2020

Nanomaterials

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Nanostructures of titanium nitride (TiN) have recently been considered as a new class of plasmonic materials that have been utilized in many solar energy applications. This work presents the synthesis of a novel nanostructure of TiN that has a nanodonut shape from natural ilmenite ore using a low-cost and bulk method. The TiN nanodonuts exhibit strong and spectrally broad localized surface plasmon resonance absorption in the visible region centered at 560 nm, which is well suited for thermoplasmonic applications as a nanoscale heat source. The heat generation is investigated by water evaporation experiments under simulated solar light, demonstrating excellent solar light harvesting performance of the nanodonut structure.

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Tuning the optical bandgap of TiO2-TiN composite films as photocatalyst in the visible light

Cited by 36 publications

References 40 publications

Influence of Preparation Method on the Structural, Linear and Nonlinear Optical Properties of TiN Nanoparticles

Influence of Preparation Method on the Structural, Linear and Nonlinear Optical Properties of TiN Nanoparticles

Growth and Characterization of Cu2MnSnS4 Thin Films Synthesized by Spray Pyrolysis under Air Atmosphere

Titanium Nitride Nanodonuts Synthesized from Natural Ilmenite Ore as a Novel and Efficient Thermoplasmonic Material

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