Hierarchical ZSM-5 nanocrystal aggregates: seed-induced green synthesis and its application in alkylation of phenol with tert-butanol†,RSC Advances

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Hierarchical ZSM-5 nanocrystal aggregates: seed-induced green synthesis and its application in alkylation of phenol with tert-butanol†
RSC Advances ( IF 3.9 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1039/c7ra12811h
Li Chen ₁ , Teng Xue ₁ , Haihong Wu ₁ , Peng Wu ₁

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Hierarchical ZSM-5 zeolite aggregates were synthesized in an organic-template-free system via seed-induced crystallization. The obtained samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N₂ adsorption–desorption, NH₃ temperature-programmed desorption (NH₃-TPD) and inductively coupled plasma atomic emission spectrometry (ICP-AES). The prepared ZSM-5 nanocrystalline aggregates possessed open/accessible hierarchical pores and active sites, showing significant advantages in the catalytic alkylation of phenol with tert-butanol. The obtained materials could maintain the activities of the nanocrystal zeolites and meanwhile could be easily separated or recovered during the preparation and reactions. This approach was simple and also overcame the commonly-seen drawbacks such as the exceeded use of specific templates or secondary templates during the synthesis of the hierarchical zeolites.

中文翻译：

分级 ZSM-5 纳米晶体聚集体：种子诱导的绿色合成及其在苯酚与叔丁醇烷基化中的应用†

通过晶种诱导结晶在无有机模板体系中合成了分级 ZSM-5 沸石聚集体。使用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、N ₂吸附-脱附、NH ₃程序升温脱附（NH ₃ -TPD）和电感耦合等离子体对所得样品进行了表征。原子发射光谱法（ICP-AES）。所制备的 ZSM-5 纳米晶聚集体具有开放/可接近的分级孔隙和活性位点，在苯酚与叔胺的催化烷基化中显示出显着优势。-丁醇。所得材料在保持纳米晶沸石活性的同时，在制备和反应过程中易于分离或回收。这种方法简单，也克服了在分层沸石合成过程中过度使用特定模板或二级模板等普遍存在的缺点。

更新日期：2018-01-17

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