TY - JOUR
T1 - New Dion-Jacobson Phase Three-Layer Perovskite CsBa2Ta3O10 and Its Conversion to Nitrided Ba2Ta3O10 Nanosheets via a Nitridation-Protonation-Intercalation-Exfoliation Route for Water Splitting
AU - Hojamberdiev, Mirabbos
AU - Bekheet, Maged F.
AU - Zahedi, Ehsan
AU - Wagata, Hajime
AU - Kamei, Yuuki
AU - Yubuta, Kunio
AU - Gurlo, Aleksander
AU - Matsushita, Nobuhiro
AU - Domen, Kazunari
AU - Teshima, Katsuya
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/4/6
Y1 - 2016/4/6
N2 - We report on the synthesis of new Dion-Jacobson phase three-layer perovskite CsBa2Ta3O10 crystals by conventional solid-state reaction and fabrication of their nitrided Ba2Ta3O10 nanosheets via a nitridation-protonation-intercalation-exfoliation route for visible-light-driven photocatalytic water splitting application. The two-dimensional crystal structure of CsBa2Ta3O10 refined by the Rietveld refinement method belongs to the simple tetragonal system and consists of corner-shared distorted TaO6 octahedra and Ba cations in cuboctahedral sites forming triple-layer perovskite slabs. The valence and conduction band edge potentials estimated by density functional theory with respect to vacuum scale and normal hydrogen electrode indicate that CsBa2Ta3O10 is a UV-light-active semiconductor that can be used for photocatalytic water splitting and decomposition of organic pollutants. The projected electronic wave functions contour plot of CsBa2Ta3O10 in the (1 0 0) plane exhibited two different Ta-O bonds. The nitridation at 800 °C for 5 h under NH3 atmosphere was found to be suitable for retaining the phase-purity of nitrided CsBa2Ta3O10 crystals. The fabricated nanosheets of nitrided Ba2Ta3O10 with lateral sizes ranging from several hundred nanometers to a few micrometers and height of about 2.3 nm can be applied for visible-light-driven photocatalytic water splitting.
AB - We report on the synthesis of new Dion-Jacobson phase three-layer perovskite CsBa2Ta3O10 crystals by conventional solid-state reaction and fabrication of their nitrided Ba2Ta3O10 nanosheets via a nitridation-protonation-intercalation-exfoliation route for visible-light-driven photocatalytic water splitting application. The two-dimensional crystal structure of CsBa2Ta3O10 refined by the Rietveld refinement method belongs to the simple tetragonal system and consists of corner-shared distorted TaO6 octahedra and Ba cations in cuboctahedral sites forming triple-layer perovskite slabs. The valence and conduction band edge potentials estimated by density functional theory with respect to vacuum scale and normal hydrogen electrode indicate that CsBa2Ta3O10 is a UV-light-active semiconductor that can be used for photocatalytic water splitting and decomposition of organic pollutants. The projected electronic wave functions contour plot of CsBa2Ta3O10 in the (1 0 0) plane exhibited two different Ta-O bonds. The nitridation at 800 °C for 5 h under NH3 atmosphere was found to be suitable for retaining the phase-purity of nitrided CsBa2Ta3O10 crystals. The fabricated nanosheets of nitrided Ba2Ta3O10 with lateral sizes ranging from several hundred nanometers to a few micrometers and height of about 2.3 nm can be applied for visible-light-driven photocatalytic water splitting.
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U2 - 10.1021/acs.cgd.6b00081
DO - 10.1021/acs.cgd.6b00081
M3 - Article
AN - SCOPUS:84964584289
VL - 16
SP - 2302
EP - 2308
JO - Crystal Growth and Design
JF - Crystal Growth and Design
SN - 1528-7483
IS - 4
ER -