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Inorganics 2018, 6(2), 41; https://doi.org/10.3390/inorganics6020041

Single Crystal Growth of Sillén–Aurivillius Perovskite Oxyhalides Bi4NbO8X (X = Cl, Br)

1
Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
2
Department of Chemistry, School of Science, Tokyo Institute of Technology, Tokyo 152-8551, Japan
3
Department of Physical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
4
CREST, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
*
Authors to whom correspondence should be addressed.
Received: 17 March 2018 / Revised: 2 April 2018 / Accepted: 9 April 2018 / Published: 16 April 2018
(This article belongs to the Special Issue Mixed Metal Oxides)
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Abstract

Sillén–Aurivillius perovskite Bi4NbO8X (X = Cl, Br) is a promising photocatalyst for water splitting under visible light, as well as a potential ferroelectric material. In this work, we investigate the crystal growth conditions by mainly varying soak temperature, soak time and cooling rate. Under the optimal conditions, we successfully obtained yellow platelet single crystals with an in-plane distance of several hundred microns. As opposed to conventional crystal growth, a moderate cooling is essential to suppress an evaporation of the Bi–O–Cl species from a melt zone. The single crystals of Bi4NbO8Br were also grown using a similar condition. We suggest that the knowledge obtained in this study can be generally applied to other Sillén–Aurivillius phases and related oxyhalides. View Full-Text
Keywords: single crystal growth; Sillén–Aurivillius compounds; melt growth; photocatalyst single crystal growth; Sillén–Aurivillius compounds; melt growth; photocatalyst
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Zhong, C.; Kato, D.; Takeiri, F.; Fujii, K.; Yashima, M.; Nishiwaki, E.; Fujii, Y.; Koreeda, A.; Tassel, C.; Abe, R.; Kageyama, H. Single Crystal Growth of Sillén–Aurivillius Perovskite Oxyhalides Bi4NbO8X (X = Cl, Br). Inorganics 2018, 6, 41.

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