title: Synthesis, characterization and luminescence study of Eu(III) tungstates and molybdates nanotubes using carbon nanotubes as templates.
abstract: Eu(III) tungstates and molybdates nanotubes have been successfully synthesized by the solvothermal method using carbon nanotubes (CNTs) as removable templates. The products were characterized by X-ray diffraction spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectrometry, thermogravimetric and differential thermalanalysis. It is demonstrated that CNTs are fully coated with an amorphous Eu(2)(MO(4))(3) (M=W, Mo) layer, which is about 10nm thick and almost continuous and uniform. After the Eu(2)(MO(4))(3) (M=W, Mo)/CNTs composites have been calcined at 700 degrees C, Eu(2)(MO(4))(3) (M=W, Mo) nanotubes are obtained by removing the CNTs templates. The diameter of the Eu(2)(MO(4))(3) (M=W, Mo) nanotubes is 40-60 nm, which is consistent with that of CNTs. The luminescence properties of the Eu(2)(MO(4))(3) (M=W, Mo) nanotubes calcined at various temperatures have been investigated. The result shows that the Eu(2)(MO(4))(3) (M=W, Mo) nanotubes obtained from the Eu(2)(MO(4))(3) (M=W, Mo)/CNTs composites calcined at 700 degrees C display a strong red emission peak at around 611 nm.
authors.affiliation: Hubei University, Wuhan 430062, People's Republic of China.
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Tang
authors.forename: Liqun
authors.initials: L
authors.lastname: Zhou
authors.forename: Fen
authors.initials: F
authors.lastname: Wang
authors.forename: Lirong
authors.initials: L
authors.lastname: Zhou
mesh_terms: D004563:Electrochemistry; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D008982:Molybdenum / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013696:Temperature; D013818:Thermogravimetry; D017973:Tungsten Compounds / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D037742:Nanotubes, Carbon; D017973:Tungsten Compounds; C044659:molybdate; D005063:Europium; D008982:Molybdenum; C045951:tungstate