Controllable Synthesis And Performances Of Rare Earth Nanostructure

Using the chemical codeposition principle, GdCoxOy nanotube and nanowire arrays and GdCoxOy:Eu、LaF3:Eu nanotube arrays were fabricated in the porous anodic aluminum oxide (AAO) template using the suction filtering at subatmospheric pressure (SFSP). The morphology, structure, composition, and luminescence properties of the nanoarrays have been studied and the results are as follow:1. GdCoxOy one-dimensional nanometer arrays were control synthesized with different shape and different diameter in the AAO template. We have discussesed the influence factors of the controllable preparation of GdCoxOy one-dimensional nanometer arrays. The results show that the GdCoxOy nanotube and nanowire arrays are uniform in size and amorphous in structure. The fluorescence activated agent Eu3+were doping in the one-dimensional arrays to gain the strong fluorescence properties and studied the differences of the fluorescence with different morphology and size, the results show that the40-70nm GdCoxOy:Eu nanotubes possess the strongest fluorescence.2. GdCoxOy:Eu nanotube arrays have been fabricated in the AAO template. The morphology, crystal structure, chemical composition and luminescence properties of the GdCoxOy:Eu nanotube arrays have been investigated by scanning electron microscopy(SEM), transmission electron microscopy(TEM), energy dispersive spectra(EDS), X-ray diffraction(XRD), selected area electron diffraction(SAED) and fluorescence spectrophotometer (PL). The results show that GdCoxOy:Eu nanotube arrays are uniform in size, amorphous in structure, and composed of Gd, Co, O and Eu, the ratio of atomic percentage of Gd, Co, O and Eu is9.80:1.14:88.14:0.92. Under394nm excitation, GdCoxOy:Eu nanotube arrays exhibited a strong emission peak at593nm, corresponding to the transition of5D0-7F1of Eu3+, a weak emission peak at710nm, corresponding to the transition of5D0-7F4and the optimum doping concentration of Eu3+is3%.3. LaF3:Eu nanotube arrays have been synthesized in the AAO template. The morphology, crystal structure and chemical composition have been characterized and studied the fluorescent properties of the nanotube arrays with different Eu3+doping and with different morphology of LaF3:Eu nanotube arrays. Results show that the LaF3:Eu nanotube arrays are amorphous in structure and LaF3:Eu nanotube arrays possess the strongest fluorescence when the optimum doping concentration of Eu3+is6%under394nm excitation.