Study On Controllable Preparation And Properties Of One-dimensional Red Long Afterglow Phosphors Y2O2S:Eu3+,Mg2+,Ti4+Nanoarrays

Long-lasting afterglow materials is a kind of energy storage function material. The ultraviolet light, natural light and artificial light can be absorbed and stored up by this materials, the afterglow of this materials can last for long after the light source was removed. This material has been applied in many fields, such as road markings, emergent illumination, advertisement, safety light etc. In recent years, nanostructured luminescence materials have attracted much interest due to their novel properties and potential applications in optical, electronics, and photonic devices, There may be some new properties if the long-lasting afterglow materials were prepared into zero-dimensional and one-dimensional, the materials can form nanoarrays if the one-dimensional phosphorescent materials were orderly arrangement which have important significance for the researching of the next generation of nanostructured luminescent devices.1、The red long-lasting afterglow luminescent nanomaterial Y2O2S:Eu3+, Mg2+, Ti4+was synthesised by sol-gel method. The samples were characterized with XRD, SEM and PL spectra. Results indicated that the sample emission peak centered at626nm, excitation peak at340nm, and the main peak of excitation spectra of nanoparticles shift to shorter wavelength as the calcining temperature reduced. The average particle size is150nm and the afterglow time can reach40min.2、The AAO template with highly ordered pore arrangement and high pore density were prepared by combining mild anodization with hard anodization method. The AAO membrane were also separated from aluminum basement by adopting the inverse power method, and then enlarged the holes of the template. This method can shorten the reaction time and get the expect templates. SEM relults showed that the pore diameter is about100nm.3、The one-dimensional red long afterglow phosphorescent materials Y2O2S: Eu3+,Mg2+, Ti4+nanotube arrays were prepared using the sol-gel template method.The nanotube arrays were grown in the AAO template by changing the sol concentration, adjusting PH value, changing the template aperture, and making the negative pressure. XRD, SEM, PL spectra were used to research the phase, the morphologies and the luminous property of the samples. The results showed that the Y2O2S:Eu3+, Mg2+, Ti4+nanotubes arrays were formed. The main emission peaks of Y2O2S:Eu3+, Mg2+, Ti4+nanotube arrays lay at626nm. The main excitation peak of322nm shows blue-shift compare with the sample obtained by solid-state reaction method.