Quantitative correlation between morphology of silicalite-1 crystals and dielectric constants of solvents

被引：9

作者：

Chen, Xiaoxin ^{[1
]}

Yan, Wenfu ^{[1
]}

Cao, Xuejing ^{[1
]}

Xu, Ruren ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2010年 / 131卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Zeolites; Silicalite-1; Microwave radiation; Mixed solvents; Morphology; HYDROTHERMAL SYNTHESIS; MICROWAVE SYNTHESIS; FIBROUS MORPHOLOGY; REVERSE MICELLES; MOLECULAR-SIEVES; ZEOLITE-A; GROWTH; ZSM-5; TEMPERATURE; DISSOLUTION;

D O I：

10.1016/j.micromeso.2009.11.039

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The quantitative correlation between morphology of silicalite-1 (Si-MFI) crystals and dielectric constants of solvents for the reaction system of TEOS-TPAOH-alcohol under microwave heating was investigated. The dielectric constant of the solvent was finely tuned by mixing water and additional alcohols according to the equation of epsilon(m) = Phi(1)epsilon(1) + Phi(2)epsilon(2) + ... + Phi(n)epsilon(n). The length and fraction of Si-MFI crystals with self-stacked morphology as a function of dielectric constant was investigated, and the linear correlation was found. The self-stacked crystals were obtained when the dielectric constant of the mixed solvent was lower than 41.0, while only fully isolated crystals were formed when the dielectric constant was higher than 45.0. The regularities observed in the microwave-assisted solvothermal synthesis system were not observed in the conventional oven-heated solvothermal synthesis system. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：45 / 50

页数：6

共 54 条

[1]

Barrer R.M., 1982, Hydrothermal chemistry of zeolites

[2] Effect of aluminum concentration on crystal size and morphology in the synthesis of a NaAl zeolite [J].