Synthesis of p‐type N‐doped TiO<sub>2</sub> thin films by co‐reactive magnetron sputtering

Panepinto, Adriano; Dervaux, Jonathan; Cormier, Pierre‐Antoine; Boujtita, Mohammed; Odobel, Fabrice; Snyders, Rony

doi:10.1002/ppap.201900203

Cited by 12 publications

(4 citation statements)

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“…In Figure 4b, compared with FS-NT (0 mL), two additional peaks of binding energy were observed at 396.8eV and 405.4eV, respectively. N 1s peaks at 396.8 eV were attributed to substitutional nitrogen (O-Ti-N) [27,29,30], while a binding energy of 405.4eV may be attributed to interstitial nitrogen [29,31,32]. The results are consistent with those of XRD and SAED.…”

Section: Resultssupporting

confidence: 83%

Preparation of Fe3O4@SiO2@N-TiO2 and Its Application for Photocatalytic Degradation of Methyl Orange in Na2SO4 Solution

Sun,

Ouyang,

et al. 2024

Applied Sciences

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In this paper, Fe3O4@SiO2@TiO2 and N-doped Fe3O4@SiO2@N-TiO2 photocatalysts with magnetic core-shell structures were prepared using a multi-step synthesis method. The materials were analyzed using various techniques, such as X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), field-emission scanning electron microscopy (FESEM), selected-area electron diffraction patterns (SAED), and X-ray photoelectron spectroscopy (XPS). The results indicated that the prepared samples had an anatase structure, and N was successfully doped. Fe3O4@SiO2@TiO2 and Fe3O4@SiO2@N-TiO2 with different amounts of nitrogen doping were used for the study of photocatalytic degradation of methyl orange (MO) in pure MO solution, and in MO and Na2SO4 (MO-Na2SO4) mixed solution, respectively. The average photocatalytic degradation rate of MO in pure MO solution with three different batches each of Fe3O4@SiO2@TiO2 and Fe3O4@SiO2@N-TiO2 (3 mL of NH4OH used for doping) under high-pressure mercury lamp irradiation reached 85.25% ± 2.23% and 95.53% ± 0.53%, respectively. The average photocatalytic degradation rate of MO in the MO-Na2SO4 mixed solution with three different batches each of Fe3O4@SiO2@TiO2 and Fe3O4@SiO2@N-TiO2 (3 mL of NH4OH used for doping) under the same irradiation condition reached 90.46% ± 3.33% and 97.79% ± 2.09%, respectively. The results showed that Na2SO4 can promote photocatalytic degradation of MO. The experiment of recycling photocatalysts showed that there was still a good degradation effect after five cycles. Finally, the first-order kinetic model and the photocatalytic degradation mechanism were investigated.

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Section: Resultssupporting

confidence: 83%

Preparation of Fe3O4@SiO2@N-TiO2 and Its Application for Photocatalytic Degradation of Methyl Orange in Na2SO4 Solution

Sun,

Ouyang,

et al. 2024

Applied Sciences

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“…The monitoring of the nitrogen atom location, especially the substitutional sites, is complex as the actual positions appear to be strongly dependent on the doping method. Indeed, the components at binding energies of 400 eV and higher, as well as that at ∼398 eV, are preponderant for samples prepared via gaseous nitrification of TiO 2 under NH 3 environnement − and via wet methods, such as sol–gel − and hydrolysis processes. , On the other hand, N-doped TiO 2 obtained by dry methods such as ion implantation, atomic layer deposition, , and reactive magnetron sputtering ,− exhibit both the 402 and 396 eV components. Here also, the variations in the N atom location as a function of the synthesis methods would be better explained if the N position was clearly established.…”

Section: Introductionmentioning

confidence: 99%

Fine Control of the Chemistry of Nitrogen Doping in TiO₂: A Joint Experimental and Theoretical Study

Panepinto¹,

Cornil²,

Bittencourt³

et al. 2020

J. Phys. Chem. C

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N-doped TiO 2 materials have recently attracted a considerable amount of interest due to their enhanced photoelectrochemical properties compared to pristine TiO 2 . However, this improvement is still not clearly correlated to the N chemistry because the attribution of the observed components in the N 1s X-ray photoelectron spectra is strongly disputed. In this context, this joint experimental and theoretical study aims at clearly distinguishing the different N atomic species and positions that can be encountered upon N-doping of titania by the N 2 + ion implantation method. Core-level binding energy shifts (CLS) calculated at a quantum-chemical level for N 1s orbitals with different chemical environments nicely match the components obtained by the fitting of the N 1s XPS experimental regions and allow for its detailed interpretation. We also monitored the N atom positions as a function of the dose used for implantation. Based on classical simulations of ion/surface interactions achieved with the help of the TRIDYN software, we show that oxygen vacancies play a key role in defining the nitrogen doping type (i.e., nitrogen position in the TiO 2 lattice), as further supported by DFT calculations.

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“…The electronic mobility of ZnO calculated by PBE is almost 2 times larger than the experimental result, and the hole is 13 times smaller. In experiment, electron and hole mobilities in TiO2 are 18.6 cm 2 V -1 s -1 [74] and 3.1 cm 2 V -1 s -1 [75], respectively. Therefore, the mobility of electrons and holes in TiO2 calculated in PBE is 10 times larger than the experimental results.…”

Section: Mobilitymentioning

confidence: 99%

Investigation of n-ZnO/p-Si and n-TiO₂/p-Si Heterojunction Solar Cells: TCAD + DFT

et al. 2023

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This paper focuses on exploring new materials and structure as a means to increase the efficiency of solar cells. Since silicon is widespread on earth, it is desirable to study heterojunction solar cells made mainly of silicon and new materials. Therefore, ZnO/Si and TiO2/Si heterojunction solar cells were studied in this paper. First, the electrical and optical properties of ZnO and TiO2 were determined using the Perdew-Burke-Ernzerhof (PBE), PBE functional revised for solids (PBESol) and Perdew-Wang (PW91) functionals of the Generalized gradient approximation (GGA) in Density Functional Theory (DFT). The obtained results in various functionals are assessed and analyzed. It was found that geometric optimized structures of TiO2 and ZnO is mechanical stable. Accordingly, in all functionals, the effective mass of the electron in ZnO and TiO2 proved to be smaller than that of the hole. The mobility of electrons and holes in ZnO was calculated to be 430.72 cm 2 V -1 s -1 and 5.25 cm 2 V -1 s -1 respectively. In TiO2, it was 355.27 cm 2 V -1 s -1 and 46.38 cm 2 V -1 s -1 . When PW91, PBESol, PBE functionals were used, the dielectric constant was determined to be 11, 11.5, 8.5 for ZnO and 9.5, 10, 9 for TiO2, respectively. According to the DFT results, it was determined that ZnO and TiO2 are transparent and mainly n-type direct semiconductors. According to device simulation, the maximum short-circuit current of ZnO/Si and TiO2/Si heterojunction solar cells is 18 mA/cm 2 at a thickness of 80 nm and 15.3 mA/cm 2 at a thickness of 40 nm. Finally, the average fill factor of ZnO/Si and TiO2/Si solar cells was 0.73 and 0.76 respectively. So TiO2 can be used as a transparent contact and ZnO as an emitter layer in a silicon-based solar cell.

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Synthesis of p‐type N‐doped TiO₂ thin films by co‐reactive magnetron sputtering

Cited by 12 publications

References 50 publications

Preparation of Fe3O4@SiO2@N-TiO2 and Its Application for Photocatalytic Degradation of Methyl Orange in Na2SO4 Solution

Preparation of Fe3O4@SiO2@N-TiO2 and Its Application for Photocatalytic Degradation of Methyl Orange in Na2SO4 Solution

Fine Control of the Chemistry of Nitrogen Doping in TiO₂: A Joint Experimental and Theoretical Study

Investigation of n-ZnO/p-Si and n-TiO₂/p-Si Heterojunction Solar Cells: TCAD + DFT

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Synthesis of p‐type N‐doped TiO2 thin films by co‐reactive magnetron sputtering

Cited by 12 publications

References 50 publications

Preparation of Fe3O4@SiO2@N-TiO2 and Its Application for Photocatalytic Degradation of Methyl Orange in Na2SO4 Solution

Preparation of Fe3O4@SiO2@N-TiO2 and Its Application for Photocatalytic Degradation of Methyl Orange in Na2SO4 Solution

Fine Control of the Chemistry of Nitrogen Doping in TiO2: A Joint Experimental and Theoretical Study

Investigation of n-ZnO/p-Si and n-TiO2/p-Si Heterojunction Solar Cells: TCAD + DFT

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Product

Resources

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Synthesis of p‐type N‐doped TiO₂ thin films by co‐reactive magnetron sputtering

Fine Control of the Chemistry of Nitrogen Doping in TiO₂: A Joint Experimental and Theoretical Study

Investigation of n-ZnO/p-Si and n-TiO₂/p-Si Heterojunction Solar Cells: TCAD + DFT