Synthesis and characterization of belt-like silicalite-1 nanocrystals with mesoporous structure

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• 作者：Yuanyuan Ma ; Jingqi Guan ; Shujie Wu ; Jing Liu ; Qiubin Kan ; Wenxiang Zhang
• 关键词：Nanomaterials ; Porosity ; Belt-like ; Silicalite-1 ; Hard template ; Nanosized Ca(OH)₂
• 刊名：Materials Letters
• 出版年：2010
• 出版时间：30 November 2010
• 年：2010
• 卷：64
• 期：22
• 页码：2523-2525
• 全文大小：450 K

文摘

A novel belt-like silicalite-1 nanocrystal with narrow mesoporosity had been synthesized by hydrothermal method. In the synthesis process, nanosized Ca(OH)₂ was used as a hard template due to the fact that it was rich in pores and could be insoluble in water. A subsequent acid washing with dilute HCl removed the nanosized Ca(OH)₂ further uncovering mesopores. A study was carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron micrograph (TEM) analysis for the physical properties of the obtained silicalite-1. Belt-like silicalite-1 exhibited a unique geometrical shape distinct from conventional MFI shape. Moreover, the samples had uniform mesopores of 22.8 Å by the result of the N₂ adsorption isotherm.