以ＡｌＣｌ３．６Ｈ２Ｏ为铝源，在低表面活性剂／硅摩尔比（０．１２）的体系中，合成Ｓｉ／Ａｌ比在１６～６４范围内变化的有序介孔硅酸铝材料．用ＸＲＤ、ＴＥＭ、ＦＴＩＲ及氮吸附等测试手段对材料进行了分析．当ＮａＯＨ／Ｓｉ比从０．２增加到０．６时，获得的有序介孔材料结构将由六角相（ＭＣＭ－４１）变成立方相（ＭＣＭ－４８）当材料中铝含量超过一定值时，有序介孔材料品质下降．ＸＲＤ分析表明，用铝原子取代硅原子将导致晶格增大．
Ordered mesoporous aluminosilicate materials with atomic Si/Al ratios of 16--64 were synthesized at a
very low molar ratio of surfactant/silica (0.12) by using aluminium chloride hexahydrate and TEOS as the sources of aluminium and silicon. The resulting
materials were characterized by XRD, TEM, FTIR and nitrogen sorption. As the NaOH/Si molar ratio increases from 0.2 to 0.6, the products obtained change
from hexagonal MCM-41 to cubic MCM-48. The quality of the product rapidly deteriorates as the aluminium content of the solid increases beyond a certain
limit. XRD shows that the substitution of the silicon by the large aluminium atoms leads to the expansion of the unit cell.
参考文献
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