Bi12O17Cl2 with a Sextuple Bi-O Layer Composed of Rock-Salt and Fluorite Units and its Structural Conversion through Fluorination to Enhance Photocatalytic Activity

Published

October 10, 2022

Author(s)

Daichi Kato, Osamu Tomita, Ryky Nelson, Maria A. Kirsanova, Richard Dronskowski, Hajime Suzuki, Chengchao Zhong, Cedric Tassel, Kohdai Ishida, Yosuke Matsuzaki, Craig Brown, Koji Fujita, Kotaro Fujii, Masatomo Yashima, Yoji Kobayashi, Akinori Saeki, Itaru Oikawa, Hitoshi Takamura, Ryu Abe, Hiroshi Kageyama, Tatiana E. Gorelik, Artem M. Abakumov

Abstract

Layered bismuth oxyhalides with bilayered (Bi₂O₂) fluorite slabs are promising visible-light photocatalysts because of the ability to control the valence band levels. Here we show that a structurally uncharacterized Bi₁₂O₁₇Cl₂, which has been extensively studied as a photocatalyst for a variety of reactions, contains a sheet of sextuple fluorite Bi₆O_8.5 slabs that is modulated by the partial inclusion of rock salt-like units. The tetrahedral vacancy in the Bi₆O_8.5 slab can be filled by a topochemical anion-exchange (F:O = 2:1) reaction with the composition of Bi₁₂O_17–0.5xF_xCl₂ (x = 4–6), resulting in the elimination of the modulation, which is likely responsible for enhanced photocatalytic activity against acetic acid decomposition under visible light irradiation. This study paves a new way of controlling the properties of layered compounds with fluorite slabs by changing the thickness and conformation of fluorite layer as well as the anion ratio of the fluorite layer.

Citation

Advanced Functional Materials

Volume

32

Issue

41

Pub Type

Journals

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DOI Link

Keywords

neutron powder diffraction, photocatalysis

Citation

Kato, D. , Tomita, O. , Nelson, R. , Kirsanova, M. , Dronskowski, R. , Suzuki, H. , Zhong, C. , Tassel, C. , Ishida, K. , Matsuzaki, Y. , Brown, C. , Fujita, K. , Fujii, K. , Yashima, M. , Kobayashi, Y. , Saeki, A. , Oikawa, I. , Takamura, H. , Abe, R. , Kageyama, H. , Gorelik, T. and Abakumov, A. (2022), Bi₁₂O₁₇Cl₂ with a Sextuple Bi-O Layer Composed of Rock-Salt and Fluorite Units and its Structural Conversion through Fluorination to Enhance Photocatalytic Activity, Advanced Functional Materials, [online], https://dx.doi.org/10.1002/adfm.202204112 (Accessed October 25, 2025)