Photoluminescence Properties Of Mesoporous SBA-15 Materials And Rare Earth Complexes Dispersed In Mesoporous Materials

Currently, there is considerable effort to produce compact solid optical devices. Rare earth ions (especially Eu³⁺ and Tb³⁺) complexes possess excellent photoluminescence properties, owing to the electron energy level transition among 4f electrons of rare earth ions. However, the light stability and hydrothermal stability of pure rare earth complexes are generally weak, which limits their applications. Inorganic materials, especially mesoporous materials with larger pore size and BET surface area, are good hosts for encapsulating guest molecules. It is theoretically and practically important to explore of the photoluminescent (PL) mechanism of mesoporous optical composites. This work is focused on the PL properties of mesoporous materials hosts and rare earth complexes encapsulated in mesoporous materials. The major contributions include the following aspects:1. Effects of hydrochloric acid content, water content and temperature on the structural order of mesoporous SBA-15 synthesized by solvent evaporation method were investigated. The mesostructured SBA-15 materials were characterized by powder X-ray diffraction (XRD), Infrared spectra (IR), and nitrogen adsorption-desorption measurements. SBA-15 synthesized by solvent evaporation method was transparent and membrane-like. Furthermore, its pore diameter and pore wall thickness was 3.5 nm and 6.0 nm, respectively.2. The PL properties of mesoporous HMS, MCM-41, SBA-3, and SBA-15 materials were characterized by PL spectra. Mesoporous materials calcined at 540°C emitted PL bands between 300 nm and 800 nm when excited by ultraviolet (λ= 300...