Preparation of fluorescent mesoporous silica nanoparticles and their properties

Using single hexadecyl trimethyl ammonium bromide (CTAB) surfactant coat dye and transfer it into the water, and preparing fluorescent dye for nuclear, mesoporous silica nanoparticles (MSNs) for shell of fluorescent mesoporous silica nanoparticles by sol-gel method. DLS was used to study the influence of tetraethyl orthosilicate, surfactant, ammonia, dye concentration on the particle size, using SEM, TEM, TG, UV and PL spectra characterize and discusses composite nanoparticles structure, morphology, thermal stability and optical. The results show that with the increase of the tetraethyl orthosilicate and ammonia, the particle size increases; the particle size will be larger when in large amount surfactant; its size will be less affected at lower dye concentrations. The preparation of the particle can be controlled around 100 nm; Fluorescence intensity increase and the optimal doping mass ratio of dye and silicon dio-xide is 1.5×10-3; thermal stability improve limited due to the physical coat and ultraviolet aging resistance is significantly improved. © 2016, Materials Review Magazine. All right reserved.