Jump to main content
Jump to site search


Preparation of highly ordered mesoporous ethane-silica under weakly acidic conditions and its hydrothermal stability

Abstract

Periodic mesoporous organosilicas were prepared using 1,2-bis(triethoxysilyl)ethane (BTEE) in the presence of a poly(ethylene oxide)-b-poly(D,L-lactic acid-co-glycolic acid)-b- poly(ethylene oxide) triblock copolymer (LGE538) template under strong and weakly acidic conditions. White solid powders were obtained even in the weakly acidic conditions using iron chloride hexahydrate and its mixed acids. Small angle X-ray scattering (SAXS) and nitrogen adsorption isotherms showed highly ordered hexagonal (p6mm) mesostructure and high specific surface area around 1,000 m2/g. Hydrothermal stability of these materials was also investigated because it is a crucial factor in their usage in chemical industry. The powders were placed in sealed vials inside a convection oven at 373 K for 4 weeks. The hydrothermally treated samples were analyzed every week up to 4 weeks using SAXS and nitrogen adsorption. Solid-state 29Si CP-MAS NMR was also measured to observe the stability of siloxane bond up to 4 weeks of hydrothermal treatment. The results showed the ethane-silica samples showed quite good stability, which makes them attractive as catalysts or supporting materials up to one month.

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Jul 2017, accepted on 11 Sep 2017 and first published on 11 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA06614G
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
  •   Request permissions

    Preparation of highly ordered mesoporous ethane-silica under weakly acidic conditions and its hydrothermal stability

    E. Choi, E. Cho and M. Jaroniec, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA06614G

Search articles by author

Spotlight

Advertisements