一种新型共生沸石(T-L)的合成与表征

在Na₂O-K₂O-Al₂O₃-SiO₂-H₂O体系中水热合成了一种新型的共生沸石, 它由L型沸石生长在T型沸石的一端而形成, 称之为T-L型沸石. 通过XRD, SEM, TEM, EDX, IR等手段对其进行了初步的表征. SEM相片表明这种沸石具有特殊的铆钉状外形; 在TEM相片上可以清楚地看到L型沸石的大孔道, 此孔道与L型沸石的表面垂直. 通过EDX的数据计算发现共生沸石的两相有不同的骨架硅铝比: T型沸石部分Si/Al＝3.71, L型沸石部分Si/Al＝3.41. 在该样品中B酸大于L酸.

Synthesis and Characterization of a Novel Intergrowth Zeolite T-L

A novel type of zeolite was synthesized in the system of Na2O-K2O-Al2O3-SiO2-H2O. The zeolite (called zeolite T-L) was the intergrowth of zeolite T and zeolite L, and zeolite L grew on one end of zeolite T particle. The shape of zeolite T-L is rivet-like. The channels of zeolite L, which are perpendicular to the plane of crystals of zeolite L, can be clearly seen in TEM photographs. The Si/Al ratio of the framework of zeolite T is larger than that of zeolite L, i.e. Si/Al=3.71 in zeolite T and Si/Al=3.41 in zeolite L. There is more B-acid than L-acid in the sample.