Title of article :
Synthesis and characterization of new catalysts formed by direct incorporation of heteropolyacids into organized mesoporous silica
Author/Authors :
Toufaily، نويسنده , , J. and Soulard، نويسنده , , M. and Guth، نويسنده , , J.-L. and Patarin، نويسنده , , J. and Delmote، نويسنده , , L. and Hamieh، نويسنده , , T. and Kodeih، نويسنده , , M. and Naoufal، نويسنده , , D. and Hamad، نويسنده , , H.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
The direct incorporation of Keggin-type heteropolyacid H3PW12O40 (PW) in a mesoporous organized silica molecular sieve during the synthesis was studied. The synthesis of silica-organized materials containing heteropolyacid was carried out in acidic media either by associating a non-ionic/cationic surfactants or just a non-ionic surfactant. The decomposition temperature of solids containing PW and prepared with TX100/CTMA, Tergitol 15-S-12 and Tween 60 starts at 130, 115 and 135 °C, respectively. The BET surface area of these solids is measured to be 892, 735 and 787 m2/g, respectively. Their pore diameters are equal to 31, 24 and 34 إ, respectively.
Keywords :
silica , Direct incorporation , Heteropolyacid , Acidic media , Mesoporous molecular sieve
Journal title :
Colloids and Surfaces A Physicochemical and Engineering Aspects
Journal title :
Colloids and Surfaces A Physicochemical and Engineering Aspects
