%0 Journal Article %A Sen, T. %A Tiddy, G. J. T. %A Casci, J. L. %A Anderson, M. W. %D 2004 %T Synthesis and Characterization of Hierarchically Ordered Porous Silica Materials %U https://acs.figshare.com/articles/journal_contribution/Synthesis_and_Characterization_of_Hierarchically_Ordered_Porous_Silica_Materials/3337411 %R 10.1021/cm034946u.s001 %2 https://acs.figshare.com/ndownloader/files/5176627 %K material %K GB %K pore %K macrosphere %K XRD %K Porous Silica Materials %K silica composites %K presence %K EO 107 PO 70 EO 107 %K hierarchically %K TEM %K SEM %K NMR %K nm %K U.K %K EO 20 PO 70 EO 20 %K triblock copolymers Pluronic F 127 %K molecule %K N 2 adsorption %X A series of hierarchically ordered porous silica composites were synthesized using anionic (SO4-2) polystyrene spheres and triblock copolymers Pluronic F127 (EO107PO70EO107) and P123 (EO20PO70EO20) as templates in the presence of cosurfactants (n-alcohols) in an acidic medium. The silica materials were characterized by XRD, SEM, TEM, Hg porosimetry, N2 adsorption, solid-state NMR, and TG-DTA. At least three distinct pore sizes are observed in these materials. The composites consist of three-dimensional ordered macrospheres (200−800 nm) with interconnecting uniform-sized (70−130 nm) windows. The walls of these macrospheres consist of mesostructured pores (3−8 nm). Nitrogen adsorption indicates the presence of microporosity (<2 nm). Here, we report the detailed synthesis and characterization of such hierarchically ordered porous silica composites (Sen et al. U.K. Patent, GB 0201951.1; Angew. Chem., Int. Ed. 2003, 42, 4649) with macro−meso−microporous structure and a three-dimensional interconnectivity. These materials could be useful as potential supports for heterogeneous catalysis for bulkier molecules where diffusion of reactant molecules could be facilitated. %I ACS Publications