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首页> 外文期刊>Journal of Crystal Growth >Fabrication of MTN-type zeolite by self-assembling of supramolecular compound
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Fabrication of MTN-type zeolite by self-assembling of supramolecular compound

机译：超分子化合物的自组装制备MTN型沸石

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摘要

MTN-type (Zeolite Socony Mobil Thirty-Nine) zeolite was prepared at 473 K by a novel method through self-assembling of a supramolecular compound called 2,4,6-tris (4-pyridyl) triazine (TPT) in DMF (N,N-dimethylformamide). The effects of fluoride, DMF and germanium on the synthesis of MTN-type zeolite were investigated. The crystallization was facilitated by adding fluoride to the synthesis solution, resulting in the formation of highly crystalline MTN samples, while some amorphous phase was observed in fluoride-free batches. DMF was required to obtain a highly crystalline MTN sample, since TPT dissolves easier in DMF than in water, thus facilitating the self-assembling of TPT into a 3D network to structure the MTN framework. The MTN structure could be synthesized at low germanium content (Ge/Si ≤ 0.18), while AST (AlPO_4-sixteen) as a foreign phase is formed at high germanium substitution (Ge/Si ≥ 0.5).
机译：通过在DMF（N）中自组装称为2,4,6-三（4-吡啶基）三嗪（TPT）的超分子化合物，通过新方法在473 K下制备MTN型（沸石Socony Mobil三十九）沸石，N-二甲基甲酰胺）。研究了氟化物，DMF和锗对MTN型沸石合成的影响。通过向合成溶液中添加氟化物来促进结晶，导致形成高度结晶的MTN样品，而在无氟化物批次中观察到一些非晶相。由于TPT在DMF中的溶解度比在水中的溶解度高，因此需要DMF才能获得高结晶度的MTN样品，从而有利于TPT自组装成3D网络以构造MTN框架。可以在低锗含量（Ge / Si≤0.18）下合成MTN结构，而在高锗取代度（Ge / Si≥0.5）下形成作为异相的AST（AlPO_4-16）。

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