Studies on preparation and luminescent character of Er³⁺/Zn²⁺-(SBA-15) composite materials

In this study, SBA-15 surface was modified with silane reagent. Then, the EDTA was grafted on the surface of the modification SBA-15. The Zn²⁺/Er³⁺ was grafted on the surface of the SBA-15 porous, and Er³⁺/Zn²⁺-(SBA-15) composite materials were prepared. The organic ligands EDTA enhanced the energy-transfer efficiency from the triplet level of ligands to the 4f electrons of Er³⁺ ion, and enhanced the luminescence intensity of the Er³⁺ ion. At the same time, Zn composite material has strong absorption to ultraviolet light, which has superior furtherance action to rare earth ion luminescence. The temperature quenching effect of Er³⁺ could be suppressed when it was introduced into porous of SBA-15. These factors provided the prepared materials with much higher relative luminescent intensities. The prepared Er³⁺/Zn²⁺-(SBA-15) composite materials showed the excellent luminescent characteristics.