Superconducting Double Perovskite Bismuth Oxide Prepared by a Low-Temperature Hydrothermal Reaction

AbstractSingle crystals of a new allotropic form of bismuth sesquioxide, Bi2O3 were prepared by low temperature hydrothermal reaction using hydrated sodium bismuth oxide, NaBiO3·nH2O, as a starting material. This bismuth oxide crystallized in the orthorhombic space group Pccn with a=12.732(2), b=4.955(2) and c=5.582(2)Å, z=4, and the R-factors were R=0.030 and Rw=0.030 for 1702 unique reflections. The crystal structure is built up by corner- and edge-sharing of irregular BiO5 polyhedra and the tunnel is running along the c-axis.

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Understanding the structure and charge transport mechanism of Sm2NiMnO6 double perovskite prepared via low temperature auto-ignition method

Physics Letters A ◽

10.1016/j.physleta.2021.127256 ◽

2021 ◽

Vol 397 ◽

pp. 127256

Author(s):

Sk. Anirban ◽

Abhigyan Dutta

Keyword(s):

Low Temperature ◽

Charge Transport ◽

Transport Mechanism ◽

Double Perovskite ◽

Charge Transport Mechanism ◽

Auto Ignition

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Ceria/Bismuth Oxide Bilayer Electrolyte based Low-Temperature SOFCs with Stable Electrochemical Performance

ECS Transactions ◽

10.1149/07801.0361ecst ◽

2017 ◽

Vol 78 (1) ◽

pp. 361-370 ◽

Cited By ~ 4

Author(s):

Abhishek Jaiswal ◽

Alireza Pesaran ◽

Shobit Omar ◽

Eric D. Wachsman

Keyword(s):

Low Temperature ◽

Electrochemical Performance ◽

Bismuth Oxide ◽

Bilayer Electrolyte

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Low temperature dielectric properties and NTCR behavior of the BaFe0.5Nb0.5O3 double perovskite ceramic

Physical Chemistry Chemical Physics ◽

10.1039/c9cp05707b ◽

2020 ◽

Vol 22 (5) ◽

pp. 2986-2998 ◽

Cited By ~ 21

Author(s):

Vijay Khopkar ◽

Balaram Sahoo

Keyword(s):

Dielectric Properties ◽

Low Temperature ◽

Temperature Coefficient ◽

Negative Temperature Coefficient ◽

Double Perovskite ◽

Negative Temperature ◽

Lead Free ◽

Temperature Coefficient Of Resistance ◽

Perovskite Ceramic

The microstructure and low-temperature dielectric properties of lead-free BaFe0.5Nb0.5O3 ceramics exhibiting a negative temperature coefficient of resistance behavior.

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A highly selective and sensitive H2S sensor at low temperatures based on Cr-doped α-Fe2O3 nanoparticles

RSC Advances ◽

10.1039/c8ra07365a ◽

2019 ◽

Vol 9 (8) ◽

pp. 4150-4156 ◽

Cited By ~ 10

Author(s):

Dongyang Xue ◽

Rui Zhou ◽

Xiaoping Lin ◽

Xiaochuan Duan ◽

Qiuhong Li ◽

...

Keyword(s):

Low Temperature ◽

Low Temperatures ◽

Hydrothermal Reaction ◽

High Sensitivity ◽

Fe2o3 Nanoparticles ◽

Sensitivity And Selectivity ◽

One Step

Cr-doped α-Fe2O3 nanoparticles were synthesized by one-step hydrothermal reaction and showed high sensitivity and selectivity to H2S at low temperature.

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Hydroxyl-Group Identification Using O K-Edge XAFS in Porous Glass Fabricated by Hydrothermal Reaction and Low-Temperature Foaming

Molecules ◽

10.3390/molecules24193488 ◽

2019 ◽

Vol 24 (19) ◽

pp. 3488 ◽

Cited By ~ 2

Author(s):

Masanori Suzuki ◽

Shigehiro Maruyama ◽

Norimasa Umesaki ◽

Toshihiro Tanaka

Keyword(s):

Low Temperature ◽

Surface Area ◽

Porous Glass ◽

Hydrothermal Reaction ◽

Group Identification ◽

Fluorescence Yield ◽

Hydroxyl Group ◽

Hydroxyl Groups ◽

Oh Groups ◽

Xafs Spectroscopy

Porous glass was prepared by the hydrothermal reaction of sodium borosilicate glass, and oxygen-ion characterization was used to identify the hydroxyl groups in its surface area. A substantial amount of “water” was introduced into the ionic structure as either OH− groups or H2O molecules through the hydrothermal reaction. When the hydrothermally treated glass was reheated at normal pressures, a porous structure was formed due to the low-temperature foaming resulting from the evaporation of H2O molecules and softening of the glass. Although it was expected that the OH− groups would remain in the porous glass, their distribution required clarification. Oxygen K-edge X-ray absorption fine structure (XAFS) spectroscopy enables the bonding states of oxygen ions in the surface area and interior to be characterized using the electron yield (EY) and fluorescence yield (FY) mode, respectively. The presence of OH− groups was detected in the O K-edge XAFS spectrum of the porous glass prepared by hydrothermal reaction with a corresponding pre-edge peak energy of 533.1 eV. In addition, comparison of the XAFS spectra obtained in the EY and FY modes revealed that the OH− groups were mainly distributed in the surface area (depths of several tens of nanometers).

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Hydrothermal Synthesis and Structure of Neptunium(V) Oxide

MRS Proceedings ◽

10.1557/proc-985-0985-nn12-02 ◽

2006 ◽

Vol 985 ◽

Author(s):

Tori Z. Forbes ◽

Peter C. Burns ◽

L. Soderholm ◽

S. Skanthakumar

Keyword(s):

Hydrothermal Synthesis ◽

Low Temperature ◽

Single Crystals ◽

Hydrothermal Reaction ◽

Three Dimensional ◽

Direct Methods ◽

Monoclinic Space Group ◽

X Ray ◽

Unique Data ◽

Ccd Detector

AbstractSingle crystals of Np2O5 have been synthesized by low-temperature hydrothermal reaction of a Np5+ stock solution with natural calcite crystals. The structure of Np2O5 was solved by direct methods and refined on the basis of F2 for all unique data collected on a Bruker X-ray diffractometer equipped with an APEX II CCD detector. Np2O5 is monoclinic, space group P2/c, with a = 8.168(2) Å, b = 6.584(1) Å, c = 9.3130(2) Å, β = 116.01(1)˚, V = 449.8(2) Å3, and Z = 1. The structure contains chains of edge-sharing neptunyl pentagonal bipyramids linked into sheets through cation-cation interactions with distorted neptunyl square bipyramids. Additional cation-cation interactions connect the sheets into a three-dimensional framework. The formation of Np2O5 on the surface of calcite crystals has important implications for the precipitation of isolated neptunyl phases in natural aqueous systems.

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