Crystal morphology control of AFI type molecular sieves with microwave irradiation

被引:106
作者
Jhung, SH
Chang, JS
Hwang, YK
Park, SE
机构
[1] Korea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South Korea
[2] Inha Univ, Dept Chem, Inchon 402751, South Korea
关键词
D O I
10.1039/b309142b
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
AFI type molecular sieves with various morphologies such as aggregated sphere, plate, rod, prism and barrel were synthesized under varying reaction conditions under microwave irradiation. Hexagonal plate-like crystals with an aspect ratio of about 0.2 were obtained in the presence of silica under alkaline conditions. Rod-like crystals with an aspect ratio of about 40 were obtained with the addition of fluoride and an increase of template and water concentrations. The addition of silica to an alkaline precursor gel hindered the crystal growth in the c-direction and the presence of fluoride ions retarded the nucleation and crystal growth.
引用
收藏
页码:280 / 285
页数:6
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