Kang, TW Oh, S Kim, H Yi, JH 2024-01-21T04:42:06Z 2024-01-21T04:42:06Z 2021-09-03 2005-06-21 0743-7463 https://pubs.kist.re.kr/handle/201004/136353 A facile method for introducing mesoporous silica sublayer onto the surface of a ceramic membrane for use in liquid-phase separation is described. To reduce the electrostatic repulsion between the mesoporous silica sol and the ceramic membrane in highly acidic conditions (pH < 2), thus facilitating the approach of hydrolyzed silica sol to the surface of the membrane, poly(sodium 4-styrenesulfonate) (Na+PSS-, denoted as PSS-) was used as an ionic linker. The use of PSS- led to a significant reduction in positive charge on the ceramic membrane, as confirmed by experimental titration data. Consistent with the titration results, the amount of mesoporous silica particles on the surface of the ceramic membrane was low, in the absence of PSS- treatment, whereas mesoporous silica sublayer with hierarchical pore structure was produced, when 1 wt % PSS- was used. The results show that mesoporous silica grows in the confined surface, eventually forming a multistacked surface architecture. The mesoporous silica sublayer contained uniform, ordered (P6mm) mesopores of ca. 7.5 nm from mesoporous silica as well as macropores (mu m) from interparticle voids, as evidenced by transmission electron microscopy and scanning electron microscopy analyses. The morphologies of the supported mesoporous silica could be manipulated, thus permitting the generation of uniform needlelike forms or uniform spheroid particles by varying the concentration of PSS-. English AMER CHEMICAL SOC ZEOLITE CRYSTALS MOLECULAR-SIEVES MATERIAL SBA-15 ION ADSORPTION FILMS COPOLYMER TRANSPARENT CATALYSTS TRIBLOCK Facile synthesis of mesoporous silica sublayer with hierarchical pore structure on ceramic membrane using anionic polyelectrolyte Article 10.1021/la0500070 1 LANGMUIR, v.21, no.13, pp.5859 - 5864 LANGMUIR 21 13 5859 5864 scie scopus 000229886300035 2-s2.0-21644476800 Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article ZEOLITE CRYSTALS MOLECULAR-SIEVES MATERIAL SBA-15 ION ADSORPTION FILMS COPOLYMER TRANSPARENT CATALYSTS TRIBLOCK