Synthesis and structural characterisation of Y2Ti2O7 using microwave hydrothermal route

Thirupathi, G.; Dasgupta, Arup; Ghosh, C.; Krupa, B.R. Vaishnavi; Sornadurai, D.; Sahu, Binaya Kumar; Dhara, Sandip

doi:10.1016/j.jallcom.2019.152273

Cited by 16 publications

(8 citation statements)

References 48 publications

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“…At very high sub-stoichiometry (δ > 1.0), a is larger than the expected value for Y2Ti2O7 pyrochlore (ca. 10.095 Å [1,12]). For smaller δ value (δ < 1), the unit cell only slightly vary.…”

Section: Discussionmentioning

confidence: 99%

“…Synthesis of Y2Ti2O7 pyrochlore phase can be achieved through different ways: mechanochemical synthesis, hydrothermal and solvothermal processes, Pechini type route, polymerized sol-gel or coprecipitation [7,[11][12][13][14][15][16]. HEBM of Y2O3 and TiO2 precursors, followed by a thermal annealing appears to be a promising elaboration route as it is a simple, economical, and solvents-free method [11,17].…”

Section: Introductionmentioning

confidence: 99%

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X-ray diffraction study of oxygen deficient Y2Ti2O7− pyrochlore powders synthesized by high-energy ball milling (HEBM)

Josserand

Chaffron

Ribis

et al. 2022

Journal of Solid State Chemistry

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

X-ray diffraction study of oxygen deficient Y2Ti2O7− pyrochlore powders synthesized by high-energy ball milling (HEBM)

Josserand

Chaffron

Ribis

et al. 2022

Journal of Solid State Chemistry

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“…The product was calcined at 800 and 1050 °C. 54 Solid-state reaction.-The optically transparent Y 2 Ti 2 O 7 pyrochlores can be fabricated from titanium and yttrium mixture oxides. The solid-state reaction method is the standard and widely accepted technique to process ceramic powders.…”

Section: Synthesis and Crystal Growthmentioning

confidence: 99%

Review —Recent Advances in Yttrium Titanate Pyrochlores: Crystal Structure and Impact of Doping Elements

Supriya

2024

ECS J. Solid State Sci. Technol.

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The invention of yttrium titanates (Y2Ti2O7) with various exciting properties in electroceramics has created great attention among industrialists and researchers. Improving the materials of pyrochlore oxides with significant properties for future electronic devices became essential. The Y2Ti2O7 is one such cubic pyrochlore at room temperature, having excellent dielectric and luminescence properties. This article comprehensively reviews the basics and state-of-the-art in developing Y2Ti2O7 ceramics. This material is widely used for electronic devices: transducers, capacitors, optoelectronic components, and light modulators. This review focuses on the fabrication methods and crystal structure mechanisms for optimizing functional properties and current challenges. Moreover, the effect of doping elements of Y2Ti2O7-based ceramics is briefly discussed. Also, future perspectives are provided to spotlight new and trending research directions in this materials research.

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“…There are two nonequivalent oxygen sites: one is surrounded by two Y 3+ and two Ti 4+ , and the other is only surrounded by Y 3+ cations . So far, Y 2 Ti 2 O 7 nanocrystals or thin films have been synthesized by varied methods such as hydrothermal processes, solid-state reaction, sol–gel processes, and mechanical milling. − Due to its excellent properties, Y 2 Ti 2 O 7 has been found to be a host material for oxygen ion conductors, optical emission, solid oxide fuel cells, and photovoltaic applications, an alternative material to immobilize nuclear solid waste, and a potential photocatalyst for water splitting. − …”

Section: Introductionmentioning

confidence: 99%

Tailoring Structural, Electronic, Optical, and Photocatalytic Properties of Y₂Ti₂O₇ through a Passivated Codoping Approach

Yang,

Li,

Dong

et al. 2024

J. Phys. Chem. C

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The large band gap of the Y 2 Ti 2 O 7 photocatalyst has limited its application only in the ultraviolet region. To enhance its photocatalytic activity for overall water splitting in the visible-light region, we have utilized a passivated codoping approach to construct eleven (X + M)-doped Y 2 Ti 2 O 7 systems (X = C, N, M = Ti, V, Zr, Nb, Mo, Hf, Ta, W), where a Ti/Y site is replaced with a metal dopant. The calculated negative formation energies indicate that all of the (X + M)-doped systems are easy to synthesize, especially under the O-rich condition. The implantation of dopants can change the crystal structure to different extents. The less the deformation of the crystal, the easier the formation of the (X + M)-doped Y 2 Ti 2 O 7 . The passivated codoping can effectively narrow the band gap without generating isolated defect states in the forbidden gap. (X + M)doped Y 2 Ti 2 O 7 retains the direct band gap characteristics and possesses the separation rate of photogenerated carriers similar to or even higher than that of the pure crystal. Compared to (N + M)-doped systems, (C + M)-doped systems exhibit more remarkable influence on narrowing the band gap and extending the absorption edge mainly because the C dopant has deeper acceptor energy levels and a stronger interaction with the metal dopant than the N dopant. The capabilities of photooxidation and photoreduction of water have been enhanced by adopting the codoping strategy. By considering the binding energy, band gap, optical absorption, and the relative position of band edges, we propose that (C + Mo)-, (C + W)-, (N + V)-, (C + V)-, (C + Nb)-and (C + Ta)-doped Y 2 Ti 2 O 7 are potential visible-light-responsive photocatalysts for overall water splitting.

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Synthesis and structural characterisation of Y2Ti2O7 using microwave hydrothermal route

Cited by 16 publications

References 48 publications

X-ray diffraction study of oxygen deficient Y2Ti2O7− pyrochlore powders synthesized by high-energy ball milling (HEBM)

X-ray diffraction study of oxygen deficient Y2Ti2O7− pyrochlore powders synthesized by high-energy ball milling (HEBM)

Review —Recent Advances in Yttrium Titanate Pyrochlores: Crystal Structure and Impact of Doping Elements

Tailoring Structural, Electronic, Optical, and Photocatalytic Properties of Y₂Ti₂O₇ through a Passivated Codoping Approach

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Synthesis and structural characterisation of Y2Ti2O7 using microwave hydrothermal route

Cited by 16 publications

References 48 publications

X-ray diffraction study of oxygen deficient Y2Ti2O7− pyrochlore powders synthesized by high-energy ball milling (HEBM)

X-ray diffraction study of oxygen deficient Y2Ti2O7− pyrochlore powders synthesized by high-energy ball milling (HEBM)

Review —Recent Advances in Yttrium Titanate Pyrochlores: Crystal Structure and Impact of Doping Elements

Tailoring Structural, Electronic, Optical, and Photocatalytic Properties of Y2Ti2O7 through a Passivated Codoping Approach

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Product

Resources

About

Tailoring Structural, Electronic, Optical, and Photocatalytic Properties of Y₂Ti₂O₇ through a Passivated Codoping Approach