سال انتشار: ۱۳۸۷

محل انتشار: دومین کنگره بین المللی علوم و فناوری نانو

تعداد صفحات: ۲

نویسنده(ها):

H aghabozorg – Faculty of Chemistry, Teacher training university, Tehran, Iran,
h kazemian – R&D Lab. Of SPAG Co., Technology incubator, Sci & Technol. Park of Tehran University, Tehran
f ghoroghchian –
f farhadi – R&D Lab. Of SPAG Co., Technology incubator, Sci & Technol. Park of Tehran University, Tehran

چکیده:

Zeolites are a series of micro porous materials whose intricate pores and channels are in the size range from 0.3 nm to 1 nm, and have been used widely as catalysts, adsorbents and ion-exchangers.Recently, nanosized zeolites have drawn much attention for their novel applications, for example, as the seed of thin film, hosts of photo chemically or optically active guests, drug delivery carriers, etc.Linde-L (LTL) was first synthesized by Breck and Flanigen[1] with a Si/Al ratio of typically 3.0 , due to its unique structural features, zeolite L is known as a good support for noble metal catalysts used in aromatization of the C6-hydrocarbons of normal structure and is being used commercially in the Chevron Aroma cyclization process.In particular, Meng et al. [1993] reported the synthesis of zeolite L particles with crystal size as low as 20 nm as determined by X-Rey diffraction (XRD).Vaghan et al. [1994] have also reported on the synthesis of nanocrystalline zeolite L in the patent literature [2]. Osamu Terasaki [2004] synthesized nano zeolite L according with those that Michael Tsapatsis, had reported at [1995] in the crystal size about 100 nm. [3]In this research the zeolite LTL is synthesized with Michael Tsapatsis composition but using different sources of silica and alumina