由粉煤灰合成铝硅酸盐介孔材料

以粉煤灰为初始原料,在碱性条件下合成了介孔铝硅酸盐材料.以粉煤灰与Na2CO3摩尔比为1∶0.85配料,混合物料研磨混合10min,在830℃焙烧2.5 h,使铝硅酸盐分解生成水溶性的硅酸盐(硅源)和铝酸盐(铝源),而后与表面活性剂十六烷基三甲基溴化铵水溶液(含有14.7 g表面活性剂)混合.混合溶胶经105℃晶化72h,再经过滤得到的白色粉末,经550℃焙烧5h后,获得介孔铝硅酸盐材料.所获得的介孔材料的d100为2.16 nm,平均孔径为4.75 nm,孔径分布主要介于0.5～10 nm之间.

SYNTHESIS OF MESOPOROUS ALUMINOSILICATE WITH FLY ASH

Mesoporous aluminosilicate was synthesized in alkaline conditions with fly ash as starting material. A mixture of fly ash and Na2CO3 with a molar ratio of 1:0.85 was first mixed uniformly in a mill for 10min and then calcined at 830 ℃ for 2.5h to decompose the aluminosilicate in the framework and forming aqueous soluble silicate (silicon source) and aluminate (aluminum source).The calcined mixture was mixed with cetylteriaethyl ammonium bromide (C16TMABr) aqueous solution (containing 14.7 g CTMABr).After the mixture solution was aged at 105 ℃ for 72h and filtered, a white powder was obtained, and then it was calcined at 550 ℃for 5 h to get a mesoporous aluminosilicate material. The as-synthesized sample has an interplanar distance d100 of 2.16 nm and a mean pore diameter of 4.75 nm; the pore diameter distribution of the product is mainly between 0.5 and 10nm.