title: Nickel titanates hollow shells: nanosphere, nanorod, and their photocatalytic properties.
abstract: Two kinds of hollow shell structured nickel titanates (nanosphere, nanorod) were prepared by the microwave-assisted hydrothermal method using carbon material as the template. Their phase structure, morphology, and optical properties were well characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-vis diffuse reflectance spectroscopy (DRS). Comparing with the template-free NiTiO3 (NiTiO3-TF), the two kinds of hollow shell structured NiTiO3 have larger Brunauer-Emmet-Teller (BET) surface areas. Both NiTiO3 nanosphere (NiTiO3-NS) and nanorod (NiTiO3-NR) showed remarkably photocatalytic H2 evolution from the methanol aqueous solution under full-arc lamp and visible light. Additional, their photocatalytic activities were also determined by photo-degradation of methyl blue (MB), and the degradation yield reached nearly 100% within 100 min on NiTiO3-NR under visible light. Whatever in photocatalytic H2 evolution or MB degradation, their photocatalytic activities all followed the order: NiTiO3-NR > NiTiO3-NS > NiTiO3-TF. The higher photocatalytic activities of the hollow shelled NiTiO3 should be due to their larger BET surface areas and more utilization of the incident light.
authors: Key Laboratory for Special Functional Materials, Henan University, Kaifeng, 475004, China.
authors: Qiuye
authors: Q
authors: Li
authors: Yangyang
authors: Y
authors: Xing
authors: Lanlan
authors: L
authors: Zong
authors: Rui
authors: R
authors: Li
authors: Jianjun
authors: J
authors: Yang
mesh_terms: D002384:Catalysis; D008027:Light; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D009532:Nickel / Q000737:chemistry* / Q000528:radiation effects; D010316:Particle Size; D016062:Porosity; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects
chemical_list: C040654:titanium nickelide; C009495:titanium dioxide; D009532:Nickel; D014025:Titanium