Facile Synthesis of Monodisperse Spherical MCM-48 Mesoporous Silica Nanoparticles with Controlled Particle Size

TitleFacile Synthesis of Monodisperse Spherical MCM-48 Mesoporous Silica Nanoparticles with Controlled Particle Size
Publication TypeJournal Article
Year of Publication2010
AuthorsKim TW, Chung PW, Lin VSY
Journal TitleChemistry of Materials
Volume22
Pages5093-5104
Date Published09/14
ISBN Number0897-4756
Accession NumberISI:000281461100030
Keywordsbinary surfactant system, carbon materials, CONTROLLED-RELEASE, drug-delivery, HUMAN CANCER-CELLS, molecular-sieves, recent progress, replication, spheres, structural control
Abstract

A rapid and facile synthesis route to the monodisperse spherical MCM-48 mesoporous silica nanoparticles (MSN) with cubic Ia (3) over bard mesostructure is developed based on the modified Stober method. The phase domain of MCM-48-type MSNs can be extended by controlling the stirring rate and molar ratios of silica source and surfactant. The formation of monodispersed spherical MCM-48-type MSNs is obtained using triblock copolymer Pluronic F127 as a particle size designer. The average size of monodisperse spherical MSN can be controlled within the range of 70-500 nm depending on the amount of F127. Moreover, the pore diameter of MSNs can be precisely controllable in pore diameters from 2.3 to 3.3 nm using different alkyl chain surfactants and simple posthydrothermal treatment. An investigation of MCM-48-type MSN materials using powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and nitrogen physisorption clearly reveals that MSNs show high specific surface area, high pore volumes, controllable morphological aspects, and tunable pore diameters. The MCM-48-type MSNs thus obtained are demonstrated as a good hard template for the preparation of other mesoporous nanoparticles, such as mesoporous metal oxides. The present discovery of the extended synthesis conditions and the binary surfactant system in MCM-48 synthesis offers reproducible and facile synthesis of the monodisperse spherical MCM-48 mesoporous silica nanoparticles with precise structural control, and thus has vast prospects for future applications of ultrafine mesostructured nanoparticle materials.

URL<Go to ISI>://000281461100030
DOI10.1021/Cm1017344