Improved photochemical properties of Aurivillius Bi5Ti3FeO15 with partial substitution of Ti4+ with Fe3+

Liu, Xuanxuan; Xu, Lei; Huang, Yanlin; Qin, Chuanxiang; Qin, Lin; Seo, Hyo Jin

doi:10.1016/j.ceramint.2017.06.103

Cited by 31 publications

(10 citation statements)

References 44 publications

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“…The observed gaps from the reported compounds may be due to the distortions from the polyhedra of Bi 3+ in the A- and B-sites of the perovskites . The results also match with those of previously reported Aurivillius-type perovskites with similar structures. − …”

Section: Resultssupporting

confidence: 89%

Structural Origin of Very Large Second-Harmonic Generation of a Layered Perovskite, Na_0.5Bi_2.5Nb₂O₉

Kim

Lee

2021

Chem. Mater.

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A series of rare-earth metal cation-doped n = 2 Aurivillius-type layered perovskites, Na 0.45 Bi 2.5 RE 0.05 Nb 2 O 9 (RE = Eu, Sm, and Pr), have been synthesized by standard solid-state reactions. Single crystals of the model compound Na 0.5 Bi 2.5 Nb 2 O 9 have been grown at 1250 °C to redetermine the structure to explain the origin of the optical properties for the reported compounds. Detailed structural analyses reveal that Na 0.5 Bi 2.5 Nb 2 O 9 and Na 0.45 Bi 2.5 RE 0.05 Nb 2 O 9 are isostructural to each other and crystallize in the noncentrosymmetric polar orthorhombic space group Cmc2 1 (no. 36). Powder second-harmonic generation (SHG) measurements indicate that while Na 0.5 Bi 2.5 Nb 2 O 9 reveals a very large SHG efficiency of 9 times that of KH 2 PO 4 , that of Na 0.45 Bi 2.5 RE 0.05 Nb 2 O 9 decreases abruptly upon doping. A careful structural analysis suggests that the net moment arising from the alignment of polyhedra of an asymmetric lone pair cation, Bi 3+ , is crucial for the very large SHG efficiency of Na 0.5 Bi 2.5 Nb 2 O 9 . Complete characterizations including infrared and ultraviolet−visible spectroscopy analysis, thermogravimetric analysis, energy-dispersive analysis by X-ray, and photoluminescence measurements along with electronic structure calculations for the title materials are presented.■ EXPERIMENTAL SECTION Materials. Na 2 CO 3 (99%, Duksan), Bi 2 O 3 (99%, Daejung), Nb 2 O 5 (99.9%, Junsei), Pr(NO 3 ) 3 •6H 2 O (99.9%,

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Section: Resultssupporting

confidence: 89%

Structural Origin of Very Large Second-Harmonic Generation of a Layered Perovskite, Na_0.5Bi_2.5Nb₂O₉

Kim

Lee

2021

Chem. Mater.

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“…Oxygen vacancies reduce intrinsic defects on particle surfaces, which are a well-known capture center for carrier recombination. This effect promotes electron-hole separation in lattices and causes increasing photocatalytic efficiency [46].…”

Section: Resultsmentioning

confidence: 99%

Atomic Layer Deposition of Mixed-Layered Aurivillius Phase on TiO2 Nanotubes: Synthesis, Characterization and Photoelectrocatalytic Properties

et al. 2020

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For the first time, one-dimensional phase-modulated structures consisting of two different layered Aurivillius phases with alternating five and six perovskite-like layers were obtained by atomic layer deposition (ALD) on the surface of TiO2 nanotubes (Nt). It was shown that the use of vertically oriented TiO2 Nt as the substrate and the ALD technology of a two-layer Bi2O3-FeOx sandwich-structure make it possible to obtain a layered structure due to self-organization during annealing. A detailed study by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the coating is conformal. Raman spectroscopic analysis indicated the structure of the layered Aurivillius phases. Transient photocurrent responses under Ultraviolet–Visible (UV-Vis) light irradiation show that the ALD coating benefits the efficiency of photon excitation of electrons. The results of the photoelectrocatalytic experiments (PEC) with methyl orange degradation as a model demonstrate the significant potential of the synthesized structure as a photocatalyst. Photoluminescent measurement showed a decrease in the probability of recombination of photogenerated electron–hole pairs for ALD-coated TiO2 Nt, which demonstrates the high potential of these structures for use in photocatalytic and photoelectrochemical applications.

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“…Several strategies have been applied to enhance its photocatalyst activity, such as (a) reducing the band gap energy, and (b) controlling the particle morphology [12,13]. Doping a metal element such as Fe, V, and Nd into Aurivillius structure has been reported to reduce the band gap energy [14][15][16]. Liu et al reported that introduced Fe dopant on Bi 4 Ti 3 O 12 can signi cantly reduce band gap energy (E g = 2.95 eV), as a result, it can be used under the visible light region (450-600 nm) [14].…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al reported that introduced Fe dopant on Bi 4 Ti 3 O 12 can signi cantly reduce band gap energy (E g = 2.95 eV), as a result, it can be used under the visible light region (450-600 nm) [14]. In addition, several researchers also reported that a compound with a four-layer Aurivillius structure in which one of the constituent elements is Fe such as Bi 5 Ti 3 FeO 15 and Bi 4.15 Nd 0.85 Ti 3 FeO 15 has a lower band gap energy of 2.07 and 2.13 eV, respectively [15][16][17]. It indicates that Fe metal can be used to enhance the photocatalytic activity of SBT.…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Synthesis and Characterization of Plate-Like Fe doped SrBi4Ti4O15 by Molten Salt Method

Prasetyo

2022

Preprint

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The molten salt method is one of the eco-friendly synthesized compound which releases the minimum amount of toxic chemicals. In addition, the molten salt method also have morphology tuning ability, therefore it gives a better opportunity for compound synthesizing. SrBi4Ti4O15 is a four-layer member of the Aurivillius compound, and one of the interesting properties of SrBi4Ti4O15 is photocatalyst. Doped with metal element is strategy to reduced band gap energy of photocatalyst material as purposes to increase its utilization under a wider visible light spectrum. Here in, Fe doped SrBi4Ti4O15 was synthesized using Na2SO4/K2SO4 molten salt method. The diffractogram of all samples revealed that all samples were successfully synthesized in the A21am space group with no impurity phase. Raman spectra confirmed the existence of typical Raman vibration peak for a four-layer Aurivillius family compound. SEM images showed that the Fe doped SBT particle shape is plate-like, and there are no agglomerations formed. Meanwhile, the UV-Vis DRS spectra revealed that Fe dopant could effectively reduce the band gap energy and resulted in obvious red shift absorption to the wider visible light region (530–705 nm).

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Improved photochemical properties of Aurivillius Bi5Ti3FeO15 with partial substitution of Ti4+ with Fe3+

Cited by 31 publications

References 44 publications

Structural Origin of Very Large Second-Harmonic Generation of a Layered Perovskite, Na_0.5Bi_2.5Nb₂O₉

Structural Origin of Very Large Second-Harmonic Generation of a Layered Perovskite, Na_0.5Bi_2.5Nb₂O₉

Atomic Layer Deposition of Mixed-Layered Aurivillius Phase on TiO2 Nanotubes: Synthesis, Characterization and Photoelectrocatalytic Properties

Eco-Friendly Synthesis and Characterization of Plate-Like Fe doped SrBi4Ti4O15 by Molten Salt Method

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Improved photochemical properties of Aurivillius Bi5Ti3FeO15 with partial substitution of Ti4+ with Fe3+

Cited by 31 publications

References 44 publications

Structural Origin of Very Large Second-Harmonic Generation of a Layered Perovskite, Na0.5Bi2.5Nb2O9

Structural Origin of Very Large Second-Harmonic Generation of a Layered Perovskite, Na0.5Bi2.5Nb2O9

Atomic Layer Deposition of Mixed-Layered Aurivillius Phase on TiO2 Nanotubes: Synthesis, Characterization and Photoelectrocatalytic Properties

Eco-Friendly Synthesis and Characterization of Plate-Like Fe doped SrBi4Ti4O15 by Molten Salt Method

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Structural Origin of Very Large Second-Harmonic Generation of a Layered Perovskite, Na_0.5Bi_2.5Nb₂O₉

Structural Origin of Very Large Second-Harmonic Generation of a Layered Perovskite, Na_0.5Bi_2.5Nb₂O₉