Preparation of a new pyrochlore-type compound Na0.32Bi 1.68Ti2O6.46(OH)0.44 by hydrothermal reaction

Qiang Dong; Hong Jiang; Nobuhiro Kumada; Yoshinori Yonesaki; Takahiro Takei; Nobukazu Kinomura

doi:10.1016/j.jssc.2011.04.035

Preparation of a new pyrochlore-type compound Na_0.32Bi _1.68Ti₂O_6.46(OH)_0.44 by hydrothermal reaction

Qiang Dong, Hong Jiang, Nobuhiro Kumada, Yoshinori Yonesaki, Takahiro Takei, Nobukazu Kinomura

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

A new pyrochlore-type Na_0.32Bi_1.68Ti ₂O_6.46(OH)_0.44 with the cubic cell of a=10.339(5) Å was prepared by hydrothermal reaction using TiO₂ (anatase) and Bi₂O₃ in NaOH solution. This compound was obtained when the molar ratio of NaOH/TiO₂ was above 2 and the reaction temperature was above 240 °C. The TG-curve of as-prepared sample showed a mass loss of 0.8 mass% which was caused by release of OH group. This compound decomposed to a pyrochlore-type compound and a layered-type Na _0.5Bi_4.5Ti₄O₁₅ above 800 °C. The optical band gap of Na_0.32Bi_1.68Ti₂O _6.46(OH)_0.44 was estimated to be 2.5 eV.

Original language	English
Pages (from-to)	1899-1902
Number of pages	4
Journal	Journal of Solid State Chemistry
Volume	184
Issue number	7
DOIs	https://doi.org/10.1016/j.jssc.2011.04.035
Publication status	Published - 2011 Jul
Externally published	Yes

Keywords

Hydrothermal
NaBiTiO (OH)
Pyrochlore

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.jssc.2011.04.035

Cite this

@article{674c5c647dc44cd5ab6d1b1402c134cb,

title = "Preparation of a new pyrochlore-type compound Na0.32Bi 1.68Ti2O6.46(OH)0.44 by hydrothermal reaction",

abstract = "A new pyrochlore-type Na0.32Bi1.68Ti 2O6.46(OH)0.44 with the cubic cell of a=10.339(5) {\AA} was prepared by hydrothermal reaction using TiO2 (anatase) and Bi2O3 in NaOH solution. This compound was obtained when the molar ratio of NaOH/TiO2 was above 2 and the reaction temperature was above 240 °C. The TG-curve of as-prepared sample showed a mass loss of 0.8 mass% which was caused by release of OH group. This compound decomposed to a pyrochlore-type compound and a layered-type Na 0.5Bi4.5Ti4O15 above 800 °C. The optical band gap of Na0.32Bi1.68Ti2O 6.46(OH)0.44 was estimated to be 2.5 eV.",

keywords = "Hydrothermal, NaBiTiO (OH), Pyrochlore",

author = "Qiang Dong and Hong Jiang and Nobuhiro Kumada and Yoshinori Yonesaki and Takahiro Takei and Nobukazu Kinomura",

note = "Funding Information: This study was partially supported by Elements Science and Technology Project from the Ministry of Education, Culture, Sports, Science and Technology, Japan .",

year = "2011",

month = jul,

doi = "10.1016/j.jssc.2011.04.035",

language = "English",

volume = "184",

pages = "1899--1902",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "7",

}

TY - JOUR

T1 - Preparation of a new pyrochlore-type compound Na0.32Bi 1.68Ti2O6.46(OH)0.44 by hydrothermal reaction

AU - Dong, Qiang

AU - Jiang, Hong

AU - Kumada, Nobuhiro

AU - Yonesaki, Yoshinori

AU - Takei, Takahiro

AU - Kinomura, Nobukazu

N1 - Funding Information: This study was partially supported by Elements Science and Technology Project from the Ministry of Education, Culture, Sports, Science and Technology, Japan .

PY - 2011/7

Y1 - 2011/7

N2 - A new pyrochlore-type Na0.32Bi1.68Ti 2O6.46(OH)0.44 with the cubic cell of a=10.339(5) Å was prepared by hydrothermal reaction using TiO2 (anatase) and Bi2O3 in NaOH solution. This compound was obtained when the molar ratio of NaOH/TiO2 was above 2 and the reaction temperature was above 240 °C. The TG-curve of as-prepared sample showed a mass loss of 0.8 mass% which was caused by release of OH group. This compound decomposed to a pyrochlore-type compound and a layered-type Na 0.5Bi4.5Ti4O15 above 800 °C. The optical band gap of Na0.32Bi1.68Ti2O 6.46(OH)0.44 was estimated to be 2.5 eV.

AB - A new pyrochlore-type Na0.32Bi1.68Ti 2O6.46(OH)0.44 with the cubic cell of a=10.339(5) Å was prepared by hydrothermal reaction using TiO2 (anatase) and Bi2O3 in NaOH solution. This compound was obtained when the molar ratio of NaOH/TiO2 was above 2 and the reaction temperature was above 240 °C. The TG-curve of as-prepared sample showed a mass loss of 0.8 mass% which was caused by release of OH group. This compound decomposed to a pyrochlore-type compound and a layered-type Na 0.5Bi4.5Ti4O15 above 800 °C. The optical band gap of Na0.32Bi1.68Ti2O 6.46(OH)0.44 was estimated to be 2.5 eV.

KW - Hydrothermal

KW - NaBiTiO (OH)

KW - Pyrochlore

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U2 - 10.1016/j.jssc.2011.04.035

DO - 10.1016/j.jssc.2011.04.035

M3 - Article

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EP - 1902

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

SN - 0022-4596

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