Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an aurivillius phase Bi2SrTa2O9 via acid treatment

Y. Tsunoda, M. Shirata, W. Sugimoto, Z. Liu, O. Terasaki, Kazuyuki Kuroda, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

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    Abstract

    An Aurivillius phase, Bi2SrTa2O9, which consists of perovskite-like slabs and bismuth oxide sheets, was treated with 3 M hydrochloric acid for 72 h, and the resultant product was characterized. Scanning electron microscopy investigation indicated that no morphological change occurred during the acid treatment. X-ray diffraction (XRD) analysis revealed that the product exhibited tetragonal symmetry with a = 0.39l ± 0.004 nm and c = 0.98 ± 0.01 nm, and the a parameter is consistent with a typical value for cubic perovskite oxides. High-resolution electron microscopy (HREM) observations along both [001] and [010] showed that the structure of the perovskite-like slabs in Bi2SrTa2O9 was retained after the acid treatment. The compositional analyses revealed the loss of a large portion of bismuth and a part of strontium (present in the bismuth oxide sheets due to B ↔ Sr disorder) and the introduction of protons. These observations indicate that the bismuth oxide sheets in Bi2SrTa2O9 were selectively leached and that protons were introduced into the interlayer space to form a protonated layered perovskite, H1.8[Sr0.8Bi0.2Ta2O7]. Though diffraction techniques (XRD and electron diffraction) demonstrated that an average structure of H1.8[Sr0.8Bi0.2Ta2O7] consisted of perovskite-like slabs stacked without displacement, HREM observation along [010] demonstrated that both a simple stacking sequence without displacement (P-type) and a stacking sequence with a relative displacement by (a + b)/2 (I-type) were present in H1.8[Sr0.8Bi0.2Ta2O7].

    Original languageEnglish
    Pages (from-to)5768-5771
    Number of pages4
    JournalInorganic Chemistry
    Volume40
    Issue number23
    DOIs
    Publication statusPublished - 2001 Nov 5

    Fingerprint

    bismuth oxides
    High resolution electron microscopy
    electron microscopy
    slabs
    preparation
    acids
    Acids
    high resolution
    diffraction
    protons
    oxides
    hydrochloric acid
    Protons
    products
    strontium
    bismuth
    interlayers
    x rays
    electron diffraction
    Bismuth

    ASJC Scopus subject areas

    • Inorganic Chemistry

    Cite this

    Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an aurivillius phase Bi2SrTa2O9 via acid treatment. / Tsunoda, Y.; Shirata, M.; Sugimoto, W.; Liu, Z.; Terasaki, O.; Kuroda, Kazuyuki; Sugahara, Yoshiyuki.

    In: Inorganic Chemistry, Vol. 40, No. 23, 05.11.2001, p. 5768-5771.

    Research output: Contribution to journalArticle

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    abstract = "An Aurivillius phase, Bi2SrTa2O9, which consists of perovskite-like slabs and bismuth oxide sheets, was treated with 3 M hydrochloric acid for 72 h, and the resultant product was characterized. Scanning electron microscopy investigation indicated that no morphological change occurred during the acid treatment. X-ray diffraction (XRD) analysis revealed that the product exhibited tetragonal symmetry with a = 0.39l ± 0.004 nm and c = 0.98 ± 0.01 nm, and the a parameter is consistent with a typical value for cubic perovskite oxides. High-resolution electron microscopy (HREM) observations along both [001] and [010] showed that the structure of the perovskite-like slabs in Bi2SrTa2O9 was retained after the acid treatment. The compositional analyses revealed the loss of a large portion of bismuth and a part of strontium (present in the bismuth oxide sheets due to B ↔ Sr disorder) and the introduction of protons. These observations indicate that the bismuth oxide sheets in Bi2SrTa2O9 were selectively leached and that protons were introduced into the interlayer space to form a protonated layered perovskite, H1.8[Sr0.8Bi0.2Ta2O7]. Though diffraction techniques (XRD and electron diffraction) demonstrated that an average structure of H1.8[Sr0.8Bi0.2Ta2O7] consisted of perovskite-like slabs stacked without displacement, HREM observation along [010] demonstrated that both a simple stacking sequence without displacement (P-type) and a stacking sequence with a relative displacement by (a + b)/2 (I-type) were present in H1.8[Sr0.8Bi0.2Ta2O7].",
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    T1 - Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an aurivillius phase Bi2SrTa2O9 via acid treatment

    AU - Tsunoda, Y.

    AU - Shirata, M.

    AU - Sugimoto, W.

    AU - Liu, Z.

    AU - Terasaki, O.

    AU - Kuroda, Kazuyuki

    AU - Sugahara, Yoshiyuki

    PY - 2001/11/5

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    N2 - An Aurivillius phase, Bi2SrTa2O9, which consists of perovskite-like slabs and bismuth oxide sheets, was treated with 3 M hydrochloric acid for 72 h, and the resultant product was characterized. Scanning electron microscopy investigation indicated that no morphological change occurred during the acid treatment. X-ray diffraction (XRD) analysis revealed that the product exhibited tetragonal symmetry with a = 0.39l ± 0.004 nm and c = 0.98 ± 0.01 nm, and the a parameter is consistent with a typical value for cubic perovskite oxides. High-resolution electron microscopy (HREM) observations along both [001] and [010] showed that the structure of the perovskite-like slabs in Bi2SrTa2O9 was retained after the acid treatment. The compositional analyses revealed the loss of a large portion of bismuth and a part of strontium (present in the bismuth oxide sheets due to B ↔ Sr disorder) and the introduction of protons. These observations indicate that the bismuth oxide sheets in Bi2SrTa2O9 were selectively leached and that protons were introduced into the interlayer space to form a protonated layered perovskite, H1.8[Sr0.8Bi0.2Ta2O7]. Though diffraction techniques (XRD and electron diffraction) demonstrated that an average structure of H1.8[Sr0.8Bi0.2Ta2O7] consisted of perovskite-like slabs stacked without displacement, HREM observation along [010] demonstrated that both a simple stacking sequence without displacement (P-type) and a stacking sequence with a relative displacement by (a + b)/2 (I-type) were present in H1.8[Sr0.8Bi0.2Ta2O7].

    AB - An Aurivillius phase, Bi2SrTa2O9, which consists of perovskite-like slabs and bismuth oxide sheets, was treated with 3 M hydrochloric acid for 72 h, and the resultant product was characterized. Scanning electron microscopy investigation indicated that no morphological change occurred during the acid treatment. X-ray diffraction (XRD) analysis revealed that the product exhibited tetragonal symmetry with a = 0.39l ± 0.004 nm and c = 0.98 ± 0.01 nm, and the a parameter is consistent with a typical value for cubic perovskite oxides. High-resolution electron microscopy (HREM) observations along both [001] and [010] showed that the structure of the perovskite-like slabs in Bi2SrTa2O9 was retained after the acid treatment. The compositional analyses revealed the loss of a large portion of bismuth and a part of strontium (present in the bismuth oxide sheets due to B ↔ Sr disorder) and the introduction of protons. These observations indicate that the bismuth oxide sheets in Bi2SrTa2O9 were selectively leached and that protons were introduced into the interlayer space to form a protonated layered perovskite, H1.8[Sr0.8Bi0.2Ta2O7]. Though diffraction techniques (XRD and electron diffraction) demonstrated that an average structure of H1.8[Sr0.8Bi0.2Ta2O7] consisted of perovskite-like slabs stacked without displacement, HREM observation along [010] demonstrated that both a simple stacking sequence without displacement (P-type) and a stacking sequence with a relative displacement by (a + b)/2 (I-type) were present in H1.8[Sr0.8Bi0.2Ta2O7].

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