Preparation And Research Of Thulium Ion Fluorescent Nanoparticles And Their Co-doped Luminescent Nanomaterials

Rare earth ions complexes have attracted great interest due to their characteristics of high color purity,extremely narrow emission band,fluorescent range that can cover the band from ultraviolet to infrared,and high internal quantum efficiency.They have applications in agricultural films,solar spectrum converters,and fluorescent materials.The range of applications of rare earth compounds with special physicochemical properties is constantly expanding,but the structural instability makes the research of rare earth doped polymer-based fluorescent materials of great significance.In this paper,an anhydrous preparation method of a composite nano-fluorescent material coated with thulium ions(Tm³⁺)complex by nano silicon dioxide?SiO₂?was studied.In addition,due to the single rare earth fluorescent material has a single fluorescent color,in order to obtain more fluorescent materials of different colors,many researchers began to study the co-doped fluorescent materials among various rare earth ions to obtain the co-doped composite rare earth luminescent materials with ideal fluorescent intensity and color.Because this paper further studies the rare earth complex ions of thulium and nanocomposites with europium ions(Eu³⁺),terbium ions(Tb³⁺)complex,and their binary nanocomposites of doping,preparation with good dispersion and fluorescent properties of rare earth complex,and studied the different rare earth ion complex were the effects of doping concentration ratio on the fluorescent performance.The organic ligands?-thiophene trifluoroacetone?Htta?,dibenzoylmethane?DBM?and 1,10-phenanthroline?Phen?were introduced into the complex of thulium ions.Because these organic ligands have strong ultraviolet absorption capacity,Tm?tta?₃phen/Tm?DBM?₃phen have strong fluorescence properties with high activity.Then,the structures and fluorescent properties of these rare earth complexes were characterized by TEM,UV,FT-IR,stea dy-state/transient fluorescence spectrometer,XRD and other tests.After testing by various characterization methods mentioned above,it is known that the organic ligand?-thiophene trifluoroacetone?Htta?is an organic ligand that more closely matches rare earth thulium ions than dibenzoylmethane?DBM?.Silicon dioxide is obtained by a new type of no water preparation nanometer ball,and through TEM characterization of the rules of SiO₂ nano ball is all together with good dispersion morphology and size of sphere structure,and then by the fractional step method,SiO₂ and rare earth complex compound preparation of SiO₂-Tm³⁺nano ball,and then we through infrared spectrum,transmission electron microscope,XRD,steady/transient fluorescence spectrometer test methods for the preparation of SiO₂-Tm³⁺fluorescence nanoparticles have been characterized.HRTEM Mapping showed that Tm?tta?₃phen/Tm?DBM?₃phen was successfully embedded into SiO₂ nanospheres,and XRD and FT-IR characterized the binding forms of rare earth complexes with nano-silica spheres and the lattice types of their structures.Fluorescence spectroscopy analysis showed that when Tm?tta?₃phen/Tm?DBM?₃phen was wrapped with SiO₂,their fluorescence performance was significantly enhanced.The Tm³⁺,Tb³⁺,Eu³⁺complexes and SiO₂-Tm³⁺,SiO₂-Tb³⁺,SiO₂-Eu³⁺nanocomposite fluorescent materials were prepared,and the rare earth complexes were doped by binary co-doping,and the rare earth nanocomposite was doped by binary co-doping.Moreover,the fluorescence performance of rare earth ions at different doping concentrations was tested by using the steady-state/transient fluorescence analyzer,and the interaction between them was analyzed.The most obvious enhancement of fluorescent performance of thulium ions and terbium ions doped fluorescent materials,thulium ions and europium ions doped fluorescent materials was obtained.