Synthesis And Performances Of Rare Earth Oxide Nanotube Arrays

In this paper, synthesized several rare earth-transition metal oxide nanotube array materials in AAO using the suction filtration at subatmospheric pressure (S FSP) method.The optical and magnetic properties of the nano-materials were studi ed and the results were shown below:1.Using the SFSP method, LaxCoyOz nanotube arrays were prepared in th e nano-channels of AAO. The morphology, structure, chemical composition and prop erties of the LaxCoyOz nanotube array were researched by scanning electron micros cope(SEM), transmission electron microscope(TEM), X-ray diffraction(XRD), energ y dispersive spectrometer(EDS), selected area electron diffraction(SAED), vibratin g sample magnetometer(VSM).The results showed that LaxCoyOz nanotube arrays s ynthetized by SFSP are amorphous structure.The hysteresis loop showed that the co ercivity of LaxCoyOz nanotube arrays obvious magnetic anisotropy in the parall el direction and the perpendicular direction.The coercivity of LaxCoyOz nanotube arrays in paralled and vertical direction are3924Oe and345Oe, the easily magne tized direction is parallel to the nanotube array.2.LaxCoyOz:Eu nanotube arrays have been synthesized in AAO template by suction filtration at subatmospheric pressure.The results show that:The LaxCoy Oz:Eu nanotube arrays exhibited two fluorescence emission bands around592n m and616nm under theexcitation of394nm, which recorresponding to5D0â†'7F1and5D0â†'7F2transitions of the Eu3+and the optimum doping concentration of Eu3+is2%.3.Using the suction filtration at subatmospheric pressure and AAO template, amorphous nanotube arrays were prepared including LaxOy, LaxCoyOz, LaxFey Oz, and LaxNiyOz.Hysteresis loop shows that the LaxOy nanotube arrays are al1soft ferromagnetic performance, the parallel direction coercivity. Whereas, the easy magnetizationability was enhanced obviously because of the Co element doped.The nanotube arrays show a strong shape anisotropy and the easily m agnetized direction isparallel to the nanotube arrays.4.The nanotube arrays with different diameter and transition metal were prepa red with SPSF and AAO, the capabilities of them to absorb the infrared light wer e tested with FTIR.The FTIR Spectra result showed that the infrared light absorbin g capabilities of the nanotube arrays was about97%were best at about200nm by th e test of different aperture of LaxCoyOz nanotube arrays,The nano-material with Fe, Ni,Zn,Co had the strongest infrared light absorbing ability.