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Ordered mesoporous silicas with ester-type [Si(CH 2 ) 2 P(O)(OC 2 H 5 ) 2 ] and acidic [Si(CH 2 ) 2 P(O)(OH) 2 ] functionalities were synthesized via co-condensation of suitable organosilanes in the presence of triblock copolymer, Pluronic P123, under acidic conditions. XRD and TEM analysis of the synthesized materials confirmed their...
The thermal and hydrothermal stability of FDU-1 silica with ordered, large (~10 nm), cage-like mesopores was studied using nitrogen and argon adsorption at −196∘C. It was confirmed that FDU-1 silica retains uniform mesoporosity even after heating for 5 hours at 950–1000∘C. Although typical FDU-1 silicas and other polymeric-templated silicas with large cage-like mesopores tend to be significantly microporous,...
Nitrogen desorption scanning hysteresis loops (DSHLs) for large-pore MCM-41 silicas (pore diameter from 4.0 to 6.5 nm) are reported for the first time. DSHLs for MCM-41 were compared with those of conventional mesoporous silicas and no appreciable differences were found, although hysteresis loops and DSHLs for the latter were usually broader. Since desorption behavior of conventional porous silicas...
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