Photocatalytic activity of 2D nanosheets of ferroelectric Dion–Jacobson compounds

Xiong, Wei; Porwal, Harshit; Luo, Hui; Araullo‐Peters, Vicente; Feng, Jingyu; Titirici, Maria‐Magdalena; Reece, Michael J.; Briscoe, Joe

doi:10.1039/c9ta11639g

Cited by 11 publications

(8 citation statements)

References 29 publications

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“…The relative density of the C2BT ceramic measured by Archimedes method was ~94%. Ag nanoparticles were deposited onto the surface of the as‐milled C2BT powders by following a photoreduction method reported elsewhere 22,32 . In a typical procedure, 0.5 g of C2BT powders were added into a Petri dish with 50 mL of 0.01 M AgNO 3 solution.…”

Section: Methodsmentioning

confidence: 99%

“…Ag nanoparticles were deposited onto the surface of the as-milled C2BT powders by following a photoreduction method reported elsewhere. 22,32 In a typical procedure, 0.5 g of C2BT powders were added into a Petri dish with 50 mL of 0.01 M AgNO 3 solution. The mixture was placed under a UV source (UV Cube with a high-pressure Hg lamp, Honle) for 10 s under constant stirring.…”

Section: Samples Preparationmentioning

confidence: 99%

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Ferroelectric and photocatalytic properties of Aurivillius phase Ca₂Bi₄Ti₅O₁₈

Wang

Zhang

et al. 2020

J. Am. Ceram. Soc.

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Aurivillius phase Ca 2 Bi 4 Ti 5 O 18 powders with micrometer size were produced by solid-state reaction. X-ray diffraction revealed that the powders had polar orthorhombic structure with space group of B2cb. Ca 2 Bi 4 Ti 5 O 18 ceramic exhibited frequency independent dielectric anomaly at 774°C. The piezoelectric coefficient d 33 value of poled Ca 2 Bi 4 Ti 5 O 18 pellets was 0.7 ± 0.2 pC/N. Both frequency independent dielectric anomaly and detectable d 33 value clearly indicated that Ca 2 Bi 4 Ti 5 O 18 is a ferroelectric material with Curie point of 774 ℃. UV-vis absorption spectra revealed that Ca 2 Bi 4 Ti 5 O 18 had a direct band gap of 3.2 eV. Photocatalytic activity of the Ca 2 Bi 4 Ti 5 O 18 powders was examined by degradation of rhodamine B (RhB) under simulated solar light. 16% of RhB solution was degraded by Ca 2 Bi 4 Ti 5 O 18 powders after 4 hours UV-vis irradiation. With Ag nanoparticles deposited on the Ca 2 Bi 4 Ti 5 O 18 powders surface, 50% of RhB was degraded under the same irradiation condition. The fitted degradation rate constant of Ag decorated Ca 2 Bi 4 Ti 5 O 18 was 4 times higher than that of bare Ca 2 Bi 4 Ti 5 O 18. This work suggested that the Aurivillius ferroelectric Ca 2 Bi 4 Ti 5 O 18 is a promising candidate for photocatalytic applications.

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Section: Methodsmentioning

confidence: 99%

Section: Samples Preparationmentioning

confidence: 99%

Ferroelectric and photocatalytic properties of Aurivillius phase Ca₂Bi₄Ti₅O₁₈

Wang

Zhang

et al. 2020

J. Am. Ceram. Soc.

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“…(PEA) 2 SnI 4 NA Thin-film transistors (TFTs) and optoelectronic [181] 2. RbBiNb 2 O 7 Hexagonal evaluated using dye degradation analysis [152] 3. RbBiNb 2 O 7 Octahedral Solar cells, water splitting, and ferroelectrics.…”

Section: Tetrahedralmentioning

confidence: 99%

A Brief Review on Key Role of Perovskite Oxides as Catalyst

Yadav

Atri

et al. 2021

ChemistrySelect

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The research work conducted mainly on the reduction reaction of NOx, the oxidation reaction of CO, and hydrocarbons, electro‐catalysis of oxygen in alkaline medium, and photocatalytic water splitting has proved excellent catalytic behavior of perovskite oxides.[16–23] Although only a few reports published usages of the perovskite oxides as catalysts for the organic transformation such as catalytic hydrogenation, Ullmann, Sonogashira reactions, and Suzuki couplings.[24–26] Yoon et al. have prepared K2CO3 based LaMn1‐xCuxO3 perovskite oxide as a potential catalyst and discussed their mechanistic aspects in various reactions occurring at room temperature.[27] Recently, Wu and Ajayan group has demonstrated the relationship between stoichiometry and activity of pure and B‐site substituted layered perovskite oxide in the decomposition reaction of isopropanol by considering Sr2Sn1‐xRuxO4 (0≤x≤1) as catalyst.[28] In this scenario, present work aims to summarize the contribution of perovskite oxides as catalyst in numerous organic syntheses and catalysis, photocatalysis, and electrocatalysis reactions.

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“…[ 24 , 26 , 27 ]. Numerous studies have been conducted on Dion–Jacobson layered perovskites, based on their wide range of potential industrial applications, such as photocatalysis, solar cells, and ionic conductors [ 28 , 29 , 30 , 31 , 32 ]. When Dion–Jacobson perovskites are exposed to a hydrogen atmosphere, there is a dramatic increase in proton conductivity due to the high mobility of protons [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the Dion–Jacobson layered perovskite RbBiNb 2 O 7 was synthesized by Li et al, through a conventional solid-state reaction [ 34 ]. At room temperature, RbBiNb 2 O 7 has an orthorhombic structure with strong a − a − c + -type octahedral tilting in Glazer notation, which belongs to the Pmc2 1 space group symmetry [ 25 , 28 , 34 ]. The lattice constants of the RbBiNb 2 O 7 unit cell were measured as 5.463, 5.393, and 11.232 Å, respectively [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation of Proton Diffusion in Dion–Jacobson Layered Perovskite RbBiNb2O7

et al. 2021

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Perovskite materials are considered to be promising electrolyte membrane candidates for electrochemical applications owing to their excellent proton- or oxide-ion-conducting properties. RbBiNb2O7 is a double-layered Dion–Jacobson perovskite oxide, with Pmc21 symmetry. In this study, the electronic structure and proton-diffusion properties of bulk RbBiNb2O7 were systematically investigated using first-principles calculations. The unique layered crystal structure of RbBiNb2O7 plays a crucial role in proton storage and proton conductivity. Different proton-diffusion steps in RbBiNb2O7 were considered, and the activation energies of the relevant diffusion steps were evaluated using the climbing image-nudged elastic band (CI-NEB) technique. The proton diffusion in RbBiNb2O7 presents a two-dimensional layered characteristic in the a-b plane, owing to its layered crystalline nature. According to the transition state calculations, our results show that the bulk RbBiNb2O7 exhibits good proton-transport behavior in the a-b plane, which is better than many perovskite oxides, such as CaTiO3, CaZrO3, and SrZrO3. The proton diffusion in the Rb–O and Nb–O layers is isolated by a higher energy barrier of 0.86 eV. The strong octahedral tilting in RbBiNb2O7 would promote proton transport. Our study reveals the microscopic mechanisms of proton conductivity in Dion–Jacobson structured RbBiNb2O7, and provides theoretical evidence for its potential application as an electrolyte in solid oxide fuel cells (SOFCs).

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Photocatalytic activity of 2D nanosheets of ferroelectric Dion–Jacobson compounds

Abstract: A ferroelectric Dion–Jacobson phase is exfoliated by a facile sonication method. Nanosheets successfully decolourized Rhodamine B dye under visible illumination, and Ag photodeposition led to a 4-fold improvement of their photocatalytic activity.

Cited by 11 publications

References 29 publications

Ferroelectric and photocatalytic properties of Aurivillius phase Ca₂Bi₄Ti₅O₁₈

Ferroelectric and photocatalytic properties of Aurivillius phase Ca₂Bi₄Ti₅O₁₈

A Brief Review on Key Role of Perovskite Oxides as Catalyst

Theoretical Investigation of Proton Diffusion in Dion–Jacobson Layered Perovskite RbBiNb2O7

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Photocatalytic activity of 2D nanosheets of ferroelectric Dion–Jacobson compounds

Abstract: A ferroelectric Dion–Jacobson phase is exfoliated by a facile sonication method. Nanosheets successfully decolourized Rhodamine B dye under visible illumination, and Ag photodeposition led to a 4-fold improvement of their photocatalytic activity.

Cited by 11 publications

References 29 publications

Ferroelectric and photocatalytic properties of Aurivillius phase Ca2Bi4Ti5O18

Ferroelectric and photocatalytic properties of Aurivillius phase Ca2Bi4Ti5O18

A Brief Review on Key Role of Perovskite Oxides as Catalyst

Theoretical Investigation of Proton Diffusion in Dion–Jacobson Layered Perovskite RbBiNb2O7

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Ferroelectric and photocatalytic properties of Aurivillius phase Ca₂Bi₄Ti₅O₁₈

Ferroelectric and photocatalytic properties of Aurivillius phase Ca₂Bi₄Ti₅O₁₈