A facile synthesis of monodispersed mesoporous silica nanospheres with Pm3n structure

作者：Fu, Wen Hua; Guan, Yejun^*; Wang, Yi Meng; He, Ming-Yuan

来源：Microporous and Mesoporous Materials, 2016, 220: 168-174.

DOI：10.1016/j.micromeso.2015.09.004

• Mesoporous silica nanospheres
• Pm3n symmetry
• Dedecyltrimethylammonium
• Carboxymethyl cellulose
• pH-modulated

Mesoporous silica nanoparticles (MSNs) have attracted increasing attention for their potential biomedical and catalytic applications. This study reported a facile synthesis of monodispersed mesoporous silica nanospheres (<100 nm) with highly ordered 3D porous structure (Pm3n symmetry) at room temperature by using dodecyltrimethylammonium bromide (C(12)TMAB) as template and carboxymethyl cellulose (CMC) as dispersing agent via a rapid two-step pH-modulated method. The silica nanospheres were characterized by XRD, SEM, TEM, dynamic light scattering (DLS), N-2 physisorption and C-13 MAS-NMR spectroscopy. The monodispersed mesoporous silica nanospheres possessed high specific surface area and large pore volume (>1 cm(3) g(-1)). The presence of CMC increased the solution viscosity and retarded the silica growth rate, thus led to small particle diameter and narrow particle size distribution.

• 出版日期2016-1-15
• 单位华东师范大学