An investigation of the nucleation/crystallization kinetics of nanosized colloidal faujasite zeolites

被引：103

作者：

Li, QH ^{[1
]}

Creaser, D ^{[1
]}

Sterte, J ^{[1
]}

机构：

[1] Chalmers Univ Technol, Div Chem Technol, S-41296 Gothenburg, Sweden

来源：

CHEMISTRY OF MATERIALS | 2002年 / 14卷 / 03期

关键词：

D O I：

10.1021/cm011242g

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：

A two-stage varying-temperature technique was utilized to study the nucleation/crystallization kinetics of nanosized faujasite zeolites from clear solutions. At 100 degreesC, the nucleation period of zeolite Y was determined to be about 6.5 days, which extended over almost the whole period of crystal growth. The crystallization kinetics of colloidal zeolite Y differed from those for another clear solution, colloidal zeolite system, namely, TPA-silicalite-1, where the nucleation and crystal growth were found to occur as separate processes. Despite the occurrence of simultaneous nucleation and crystal growth, the colloidal zeolite Y product had a crystal size distribution similar to that for TPA-silicalite-1. In addition, the influence of the growth-limiting nutrient (Na+) on the crystallization of zeolite Y was investigated. The sodium concentration in the synthesis solution could be controlled below a critical level to avoid the nucleation of zeolite A.

引用

页码：1319 / 1324

页数：6

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