Nanosized AlPO4-5 molecular sieves and ultrathin films prepared by microwave synthesis

被引：124

作者：

Mintova, S ^{[1
]}

Mo, S ^{[1
]}

Bein, T ^{[1
]}

机构：

[1] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

来源：

CHEMISTRY OF MATERIALS | 1998年 / 10卷 / 12期

关键词：

D O I：

10.1021/cm980459g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanosized A1PO(4)-5 molecular sieves and submicron A1PO(4)-5 films were synthesized by microwave treatment of aluminophosphate precursors. The effects of the chemical composition of the initial solution and the conditions of microwave treatment of aluminophosphate precursors on the synthesis of nanosized A1PO(4)-5 molecular sieves were investigated. The syntheses were performed under hydrothermal conditions in a microwave oven at temperatures ranging from 90 to 160 degrees C, using various concentrations of H2O and organic template and varying aging times. The resulting bulk products were analyzed using X-ray diffraction, scanning electron microscopy, thermogravimetry, dynamic light scattering, and nitrogen sorption. Optimal conditions for the preparation of nanosized molecular sieve crystals were found. Thin films of A1PO(4)-5 on acoustic wave devices were also prepared, composed of a molecular coupling layer, A1PO(4)-5 seed crystals, and a homogeneous porous film formed by microwave treatment of an aluminophosphate precursor. The initial mixture composition and microwave conditions affect the thickness and the orientation of the zeolite crystals in the films. Sorption isotherms for n-hexane and cyclohexane in these A1PO(4)-5 films are reported.

引用

页码：4030 / 4036

页数：7

共 23 条

[1] Synthesis and applications of molecular sieve layers and membranes [J].