Synthesis Of Nanosized HMS Mesoporous Molecular Sieve in an ionic Liquid-Water Mixture

摘要

The hexagonal mesoporous silica (HMS) nano-particles were prepared in mixture of l-butyl-3-methyl-imidazolium tetrafluoroborate (BMIM~+BF_4~-) ionic liquid and water by a sol-gel method. The structure and morphology of obtained materials were characterized by X-ray powder diffraction (XRD), N_2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS). The influence of the amount of BMDVI~+BF_4~- was investigated. It was shown that the synthesized materials have discrete and uniform spherical morphology with the size in the range of 68-177 nm (obtained from DLS measurements), and the particle size of HMS can be controlled by varying the amount of BMM~+BF_4~-.