Microwave synthesis of nanoporous materials

被引:583
作者
Tompsett, GA [1 ]
Conner, WC
Yngvesson, KS
机构
[1] Univ Massachusetts, Dept Chem Engn, Goessmann Lab 159, Amherst, MA 01003 USA
[2] Univ Massachusetts, Dept Elect & Comp Engn, Amherst, MA 01003 USA
关键词
hydrothermal synthesis; mesoporous materials; microporous materials; microwaves; zeolites;
D O I
10.1002/cphc.200500449
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
Studies in the last decade suggest that microwave energy may have a unique ability to influence chemical processes. These include chemical and materials syntheses as well as separations. Specifically, recent studies have documented a significantly reduced time for fabricating zeolites, mixed oxide and mesoporous molecular sieves by employing microwave energy. In many cases, microwave syntheses hove proven to synthesize new nanoporous structures. By reducing the times by over an order of magnitude, continuous production would be possible to replace batch synthesis. This lowering of the cost would make-more nonoporous materials readily available for many chemical, environmental and biological applications. Further, microwave syntheses have often proven to create more uniform (defect-free) products than from conventional hydrothermol synthesis. However, the mechanism and engineering for the enhanced rates of syntheses are unknown. We review the many studies that have demonstrated the enhanced syntheses of nanoporous oxides and analyze the proposals to explain differences in microwave reactions. Finally, the microwave reactor engineering is discussed, as it explains the discrepancies between many microwave studies.
引用
收藏
页码:296 / 319
页数:24
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