Formation of silicalite-1 hollow spheres by the self-assembly of nanocrystals

被引:103
作者
Naik, SP
Chiang, AST [1 ]
Thompson, RW
Huang, FC
机构
[1] Natl Cent Univ, Dept Chem & Mat Engn, Chungli 320, Taiwan
[2] Natl Cent Univ, Grad Inst Environm Engn, Chungli 320, Taiwan
[3] Worcester Polytech Inst, Dept Chem Engn, Worcester, MA 01609 USA
关键词
D O I
10.1021/cm020786v
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 simple approach is reported for the preparation of hollow spheres with a 10-20-nm-thick shell of silicalite-1 nanocrystals. The nanocrystals were produced by the steaming of silicalite-1 nanoprecursors (NPs), collected with the help of surfactant from a clear synthesis solution immediately following the induction period. The nanocrystals produced were approximate to10-20 nm with a BET surface area of 440-470 m(2)/g and an external surface area > 112 m(2)/g. A water adsorption isotherm confirmed that the nanocrystals were hydrophobic in nature. These nanocrystals self-assembled into hollow spheres of 100-300-nm diameter when ultrasonicated in ammoniac ethanol.
引用
收藏
页码:787 / 792
页数:6
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