caa a22 4500 463225414 CHVBK 20180405153225.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0412-1 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0412-1 Synthesis of 3-dimensional mesoporous silica using a di-block copolymer template [Elektronische Daten] [Jinlan Ju, Huining Xiao, Zisheng Zhang] Exploring polymeric surfactants as templates for synthesizing ordered mesoporous silicas has become increasingly important for both academic interests and industrial applications. In this work, we employed C16EO40, a di-block copolymer polyethylene-poly(ethylene oxide), as template in an attempt to synthesize a modified 3-dimensional wormhole mesoporous silicas (WMS-39). In addition, various synthesizing conditions were investigated, including pre-hydrolysis time of TEOS, reaction temperatures and the ratios of TEOS to template. The products were characterized using powder XRD, TEM, 29Si MAS NMR and nitrogen adsorption measurements. The characteristics of as-synthesized mesoporous silica were compared with SBA-15, a highly ordered mesoporous silica, prepared using non-ionic tri-block copolymers of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) as templates. The WMS-39 materials have a BET surface area of 600-970m2/g and narrowly distributed pore diameter around 3.9nm. The morphology of WMS-39 was found to be wormhole framework as indicated in TEM diagrams. Thermal transformation of the as-synthesized mesoporous materials were carefully analyzed with TGA/DTA. Findings obtained from this work enable us to propose a modified assembly mechanism of mesoporous silicas. Springer Science+Business Media, LLC, 2007 Ju Jinlan Department of Chemical Engineering, University of New Brunswick, E3B 5A3, Fredericton, NB, Canada aut Xiao Huining Department of Chemical Engineering, University of New Brunswick, E3B 5A3, Fredericton, NB, Canada aut Zhang Zisheng Department of Chemical Engineering, University of Ottawa, K1N 6N5, Ottawa, ON, Canada aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4461-4469 0022-2461 42:12<4461 2007 42 10853 https://doi.org/10.1007/s10853-006-0412-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0412-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ju Jinlan Department of Chemical Engineering, University of New Brunswick, E3B 5A3, Fredericton, NB, Canada aut NATIONALLICENCE 700 1- Xiao Huining Department of Chemical Engineering, University of New Brunswick, E3B 5A3, Fredericton, NB, Canada aut NATIONALLICENCE 700 1- Zhang Zisheng Department of Chemical Engineering, University of Ottawa, K1N 6N5, Ottawa, ON, Canada aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4461-4469 0022-2461 42:12<4461 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer