title: Enhanced photocatalytic performance of TiO2-ZnO hybrid nanostructures.
abstract: We studied the photocatalytic properties of rational designed TiO2-ZnO hybrid nanostructures, which were fabricated by the site-specific deposition of amorphous TiO2 on the tips of ZnO nanorods. Compared with the pure components of ZnO nanorods and amorphous TiO2 nanoparticles, these TiO2-ZnO hybrid nanostructures demonstrated a higher catalytic activity. The strong green emission quenching observed from photoluminescence of TiO2-ZnO hybrid nanostructures implied an enhanced charge transfer/separation process resulting from the novel type II heterostructures with fine interfaces. The catalytic performance of annealing products with different TiO2 phase varied with the annealing temperatures. This is attributed to the combinational changes in Eg of the TiO2 phase, the specific surface area and the quantity of surface hydroxyl groups.
authors.affiliation: 1] Department of Materials Science and Engineering, South University of Science and Technology, Shenzhen, 518055, China [2].
authors.forename: Chun
authors.initials: C
authors.lastname: Cheng
authors.affiliation: 1] Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3217, Australia [2].
authors.forename: Abbas
authors.initials: A
authors.lastname: Amini
authors.affiliation: Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Zhu
authors.affiliation: Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China.
authors.forename: Zuli
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO) and the School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Haisheng
authors.initials: H
authors.lastname: Song
authors.affiliation: Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D008027:Light; D049329:Nanostructures / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D014025:Titanium; D015034:Zinc Oxide