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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

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 Bi6O8.5 slabs that is modulated by the partial inclusion of rock salt-like units. The tetrahedral vacancy in the Bi6O8.5 slab can be filled by a topochemical anion-exchange (F:O = 2:1) reaction with the composition of Bi12O17–0.5xFxCl2 (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

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), Bi<sub>12</sub>O<sub>17</sub>Cl<sub>2</sub> 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 February 21, 2024)
Created October 10, 2022, Updated January 23, 2024