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以十六烷基三甲基溴化铵作为介孔生成剂一步合成分级结构的[B]-ZSM-5。

One-step synthesis of hierarchical [B]-ZSM-5 using cetyltrimethylammonium bromide as mesoporogen.

作者信息

Karakaya YalÇin Büşra, İpek Bahar

机构信息

Department of Chemical Engineering, Faculty of Engineering, Middle East Technical University, Ankara Turkey.

出版信息

Turk J Chem. 2020 Jun 1;44(3):841-858. doi: 10.3906/kim-2001-42. eCollection 2020.

DOI:10.3906/kim-2001-42
PMID:33488198
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7671202/
Abstract

One-step facile synthesis of boron containing ZSM-5 microspheres is developed using 1,6-diaminohexane as the structure-directing agent and cetyltrimethylammonium bromide as the mesoporogen. High boron incorporation up to Si/B ratio of 38 is achieved and evidenced by the stretching vibrations of B-O-Si at 667 cm and 917 cm using Fourier-transform infrared spectra. The morphology of the crystals resembles berry-like spheres with sizes approximately 15 μm, which is composed of aggregated nanocrystals having sizes around 450 nm, is observed using scanning electron microscopy. The textural properties, i.e. the surface areas and pore volumes are investigated using N adsorption at -196 °C. t-plot micropore volume of 0.11 cm/g and mesopore volume of 0.14 cm/g are obtained applying this synthesis method for mesopores having pore diameters within the range of 2-10 nm.

摘要

以1,6 - 二氨基己烷为结构导向剂、十六烷基三甲基溴化铵为介孔生成剂，开发了一步简便合成含硼ZSM - 5微球的方法。通过傅里叶变换红外光谱在667 cm和917 cm处的B - O - Si伸缩振动实现并证明了高达Si/B比为38的高硼掺入。使用扫描电子显微镜观察到晶体形态类似于大小约为15μm的浆果状球体，其由大小约为450 nm的聚集纳米晶体组成。在-196°C下使用N吸附研究了结构性质，即表面积和孔体积。对于孔径在2 - 10 nm范围内的介孔，采用这种合成方法获得了0.11 cm³/g的t - 图微孔体积和0.14 cm³/g的介孔体积。

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