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Tsunoda Y, Shirata M, Sugimoto W, et al. Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an Aurivillius phase Bi(2)SrTa(2)O(9) via acid treatment. Inorg Chem. 2001;40(23):5768-71doi: 10.1021/ic010266m.
Tsunoda, Y., Shirata, M., Sugimoto, W., Liu, Z., Terasaki, O., Kuroda, K., & Sugahara, Y. (2001). Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an Aurivillius phase Bi(2)SrTa(2)O(9) via acid treatment. Inorganic chemistry, 40(23), 5768-71. https://doi.org/10.1021/ic010266m
Tsunoda, Y, et al. "Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an Aurivillius phase Bi(2)SrTa(2)O(9) via acid treatment." Inorganic chemistry vol. 40,23 (2001): 5768-71. doi: https://doi.org/10.1021/ic010266m
Tsunoda Y, Shirata M, Sugimoto W, Liu Z, Terasaki O, Kuroda K, Sugahara Y. Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an Aurivillius phase Bi(2)SrTa(2)O(9) via acid treatment. Inorg Chem. 2001 Nov 05;40(23):5768-71. doi: 10.1021/ic010266m. PMID: 11681883.
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Inorg Chem. 2001 Nov 05;40(23):5768-71. doi: 10.1021/ic010266m.

Preparation and HREM characterization of a protonated form of a layered perovskite tantalate from an Aurivillius phase Bi(2)SrTa(2)O(9) via acid treatment.

Inorganic chemistry

Y Tsunoda, M Shirata, W Sugimoto, Z Liu, O Terasaki, K Kuroda, Y Sugahara

Affiliations

  1. Department of Applied Chemistry, School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.

PMID: 11681883 DOI: 10.1021/ic010266m

Abstract

An Aurivillius phase, Bi(2)SrTa(2)O(9), 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 = 0.391 +/- 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 Bi(2)SrTa(2)O(9) 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 Bi(2)SrTa(2)O(9) were selectively leached and that protons were introduced into the interlayer space to form a protonated layered perovskite, H(1.8)[Sr(0.8)Bi(0.2)Ta(2)O(7)]. Though diffraction techniques (XRD and electron diffraction) demonstrated that an average structure of H(1.8)[Sr(0.8)Bi(0.2)Ta(2)O(7)] 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 H(1.8)[Sr(0.8)Bi(0.2)Ta(2)O(7)].

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