Preparation,Luminescence Property And Surface Modification Of Lanthanide Complexes Doped SiO₂ Nanoparticles

The synthesis process and luminescence behavior of DBM-Eu³⁺ co-doped or PHBA-Tb³⁺co-doped SiO₂ nanoparticles were investigated. The effect of the concentration of lanthanide ions, reaction temperature, the pH value on the synthesis process and luminescence behavior was discussed. At the same time, surface modification was also done by the organic molecule APS.DBM-Eu³⁺ doped SiO₂ nanoparticles can be prepared by sol-gel process. The DBM-Eu³⁺ complexes were successfully synthesized in situ so that the SiO₂ nanoparticles emitted bright red light when excited with a hand UV lamp. The luminescent intensity of the DBM-Eu³⁺ doped SiO₂ nanoparticles increased remarkably with the increasing doping concentration of Eu³⁺ ions. With increase of reaction temperature, the luminescent intensity increased gradually. The PHBA-Tb³⁺ was also successfully synthesized in situ in the doped SiO₂ nanoparticles by sol-gel process. PHBA-Tb³⁺ doped SiO₂ nanoparticles emitted bright green light when excited with a hand UV lamp. Surface modification of SiO₂ nanoparticles also was successfully done by organic molecule APS. The surface modification of APS would not change the luminescent intensity of the lanthanide complexes doped SiO₂ nanoparticles.