title: Controlled synthesis of magnetic iron oxides@SnO2 quasi-hollow core-shell heterostructures: formation mechanism, and enhanced photocatalytic activity.
abstract: Iron oxide/SnO(2) magnetic semiconductor core-shell heterostructures with high purity were synthesized by a low-cost, surfactant-free and environmentally friendly hydrothermal strategy via a seed-mediated method. The morphology and structure of the hybrid nanostructures were characterized by means of high-resolution transmission electron microscopy and X-ray diffraction. The morphology evolution investigations reveal that the Kirkendall effect directs the diffusion and causes the formation of iron oxide/SnO(2) quasi-hollow particles. Significantly, the as-obtained iron oxides/SnO(2) core-shell heterostructures exhibited enhanced visible light or UV photocatalytic abilities, remarkably superior to as-used α-Fe(2)O(3) seeds and commercial SnO(2) products, mainly owing to the effective electron hole separation at the iron oxides/SnO(2) interfaces.
authors.affiliation: School of Printing and Packaging, Wuhan University, Wuhan, 430072, PR China. weiwu@whu.edu.cn
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Shaofeng
authors.initials: S
authors.lastname: Zhang
authors.forename: Feng
authors.initials: F
authors.lastname: Ren
authors.forename: Xiangheng
authors.initials: X
authors.lastname: Xiao
authors.forename: Juan
authors.initials: J
authors.lastname: Zhou
authors.forename: Changzhong
authors.initials: C
authors.lastname: Jiang
mesh_terms: D002384:Catalysis; D003460:Crystallization / Q000379:methods*; D005290:Ferric Compounds / Q000737:chemistry*; D008027:Light; D046911:Macromolecular Substances / Q000737:chemistry; D008280:Magnetics; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D016062:Porosity; D012666:Semiconductors; D013499:Surface Properties; D017971:Tin Compounds / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D005290:Ferric Compounds; D046911:Macromolecular Substances; D017971:Tin Compounds; C000499:ferric oxide; C045358:stannic oxide