caa a22 4500 463170210 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10450-007-9072-y doi (NATIONALLICENCE)springer-10.1007/s10450-007-9072-y Polymer-templated organosilicas with hexagonally ordered mesopores: the effect of organosilane addition at different synthesis stages [Elektronische Daten] [Rafal Grudzien, Bogna Grabicka, Ryan Felix, Mietek Jaroniec] Two series of ordered mesoporous organosilica (OMO) SBA-15 materials with surface and bridging groups were fabricated by varying the organic precursor addition at different synthesis stages. The consequence of the delayed introduction of organic precursor on the structural and adsorption properties of the resulting OMOs was investigated. The OMOs studied were synthesized via co-condensation of tetraethyl orthosilicate (TEOS) and ureidopropyltrimethoxysilane (UPS) as well as TEOS and bis(triethoxysilylpropyl) disulfide (BTDS) in the presence of poly(ethylene oxide)-poly(propylene oxide)- poly(ethylene oxide) triblock copolymer Pluronic P123 (EO20PO70EO20). The aforementioned OMOs were characterized by nitrogen adsorption-desorption isotherms at −196 °C and powder X-ray diffraction (XRD). Nitrogen adsorption isotherms were used to estimate the pore volume, mesopore diameter and the BET specific surface area, whereas the XRD data provided information about structural ordering and unit cell of the samples studied. Springer Science+Business Media, LLC, 2007 Channel-like mesostructures nationallicence Ordered mesoporous organosilicas nationallicence Nitrogen adsorption nationallicence SBA-15 nationallicence Ureidopropyl surface group nationallicence Bis(propyl)disulfide bridging group nationallicence a : unit cell parameter (nm) nationallicence PN/S : nitrogen or sulfur weight percentages obtained from elemental analysis (%) nationallicence SBET : BET specific surface area (m2/g) nationallicence Vc : volume of micropores and interconnecting pores of the diameter below 4 nm (cc/g) nationallicence Vp : volume of primary pores (cc/g) nationallicence Vt : single-point pore volume (cc/g) nationallicence wKJS : mesopore diameter calculated by the KJS method(nm) nationallicence Grudzien Rafal Chemistry Department, Kent State University, Kent, OH, USA aut Grabicka Bogna Chemistry Department, Kent State University, Kent, OH, USA aut Felix Ryan Chemistry Department, Kent State University, Kent, OH, USA aut Jaroniec Mietek Chemistry Department, Kent State University, Kent, OH, USA aut Adsorption Springer US; http://www.springer-ny.com 13/3-4(2007-08-01), 323-329 0929-5607 13:3-4<323 2007 13 10450 https://doi.org/10.1007/s10450-007-9072-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9072-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grudzien Rafal Chemistry Department, Kent State University, Kent, OH, USA aut NATIONALLICENCE 700 1- Grabicka Bogna Chemistry Department, Kent State University, Kent, OH, USA aut NATIONALLICENCE 700 1- Felix Ryan Chemistry Department, Kent State University, Kent, OH, USA aut NATIONALLICENCE 700 1- Jaroniec Mietek Chemistry Department, Kent State University, Kent, OH, USA aut NATIONALLICENCE 773 0- Adsorption Springer US; http://www.springer-ny.com 13/3-4(2007-08-01), 323-329 0929-5607 13:3-4<323 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer