title: Structural transformation of Bi1-x/3V1-xMoxO4 solid solutions for light-driven water oxidation.
abstract: The influence of molybdenum content in the solid solutions of Bi1-x/3V1-xMoxO4 (x = 0.05-0.20) on the morphology, band gap, structure and light-driven water oxidation properties has been studied by scanning electron microscopy, X-ray powder diffraction and vibrational spectroscopy (Raman and infrared). To find out the peculiarities of structural changes for bismuth scheelite-related oxides containing both vanadium and molybdenum crystals of Bi0.98V0.93Mo0.07O4 have been grown from a K-Bi-V-Mo-O high-temperature melt and characterized by single crystal X-ray diffraction. For the scheelite-related framework both V and Mo were found to occupy the same positions lowering the point group symmetry of tetrahedra from 4/m to 2/m giving monoclinic distortion for solid solutions with x = 0.05-0.10. The most promising photocatalytic performance was obtained for Bi0.96Mo0.10V0.90O4, in which the oxygen evolution could reach 21 μM in 50 s under visible light of LEDs, λ = 470 ± 10 nm, and 820 μE cm(-2) s(-1). The changes in catalytic properties are shown to be governed by a crystal structure strain with a maximum obtained for the boundary sample between the monoclinic and tetragonal phase.
authors.affiliation: Department of Chemistry, Taras Shevchenko National University of Kiev, Volodymyrska st, 64/13, 01601, Kiev, Ukraine. tereb@bigmir.net.
authors.forename: Kateryna V
authors.initials: KV
authors.lastname: Terebilenko
authors.affiliation: Department of Chemistry, Taras Shevchenko National University of Kiev, Volodymyrska st, 64/13, 01601, Kiev, Ukraine. tereb@bigmir.net.
authors.forename: Konstantin L
authors.initials: KL
authors.lastname: Bychkov
authors.affiliation: STC "Institute for Single Crystals" NAS of Ukraine, 60 Lenina ave., Kharkiv, 61001, Ukraine.
authors.forename: Vyacheslav N
authors.initials: VN
authors.lastname: Baumer
authors.affiliation: Department of Chemistry, Taras Shevchenko National University of Kiev, Volodymyrska st, 64/13, 01601, Kiev, Ukraine. tereb@bigmir.net.
authors.forename: Nikolay S
authors.initials: NS
authors.lastname: Slobodyanik
authors.affiliation: Department of Chemistry, Taras Shevchenko National University of Kiev, Volodymyrska st, 64/13, 01601, Kiev, Ukraine. tereb@bigmir.net and National O.O. Bogomoletz Medical University, 13 T. Shevchenko Blvd., Kyiv, 01601, Ukraine.
authors.forename: Mariia V
authors.initials: MV
authors.lastname: Pavliuk
authors.affiliation: National O.O. Bogomoletz Medical University, 13 T. Shevchenko Blvd., Kyiv, 01601, Ukraine.
authors.forename: Anders
authors.initials: A
authors.lastname: Thapper
authors.affiliation: Department of Chemistry - Ångström Laboratory, P.O. Box 523, S-75120, Uppsala, Sweden.
authors.forename: Inna I
authors.initials: II
authors.lastname: Tokmenko
authors.affiliation: Laboratory of Optical Submicron Spectroscopy, NAS of Science of Ukraine, V. Lashkarev Institute of Semiconductor Physics, 45 prosp. Nauki str., 03028, Kiev, Ukraine.
authors.forename: Iurii M
authors.initials: IM
authors.lastname: Nasieka
authors.affiliation: Laboratory of Optical Submicron Spectroscopy, NAS of Science of Ukraine, V. Lashkarev Institute of Semiconductor Physics, 45 prosp. Nauki str., 03028, Kiev, Ukraine.
authors.forename: Viktor V
authors.initials: VV
authors.lastname: Strelchuk