title: Efficient noble-metal-free γ-Fe₂O₃@NiO core-shell nanostructured photocatalysts for water oxidation.
abstract: Flowerlike noble-metal-free γ-Fe2O3@NiO core-shell hierarchical nanostructures have been fabricated and examined as a catalyst in the photocatalytic oxidation of water with [Ru(bpy)3](ClO4)2 as a photosensitizer and Na2S2O8 as a sacrificial electron acceptor. An apparent TOF of 0.29 μmols(-1) m(-2) and oxygen yield of 51% were obtained with γ-Fe2O3@NiO. The γ-Fe2O3@NiO core-shell hierarchical nanostructures could be easily separated from the reaction solution whilst maintaining excellent water-oxidation activity in the fourth and fifth runs. The surface conditions of γ-Fe2O3@NiO also remained unchanged after the photocatalytic reaction, as confirmed by X-ray photoelectron spectroscopy (XPS).
authors.affiliation: State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (China).
authors.forename: Xiaoqiang
authors.initials: X
authors.lastname: Du
authors.forename: Jie
authors.initials: J
authors.lastname: Wei
authors.forename: Jinli
authors.initials: J
authors.lastname: Zhao
authors.forename: Ruixin
authors.initials: R
authors.lastname: Han
authors.forename: Yong
authors.initials: Y
authors.lastname: Ding
keywords: magnetic properties; nanostructures; oxidation; photocatalysis; water