新型含硼 B/Al-ZSM-12 沸石的合成与表征

IF 4.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Chemistry and Physics Pub Date : 2024-08-08 DOI:10.1016/j.matchemphys.2024.129825
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引用次数: 0

摘要

本研究采用水热合成技术,以甲基三乙基氯化铵为模板,开发了新型硼取代 Al-ZSM-12,并详细研究了 B/Al-ZSM-12 的物理和化学特性。傅立叶变换红外光谱、拉曼光谱、DRS 紫外可见光谱、DRIFTS、Si 和 B NMR 以及 ICP-MS 方法证实了同构取代沸石中四面体硼的存在。由于在 Al-ZSM-12 沸石中加入了硼,与未取代的 Al-ZSM-12 相比,B/Al-ZSM-12 的结晶体具有更短的轴长。此外,硼原子不会影响 Al-ZSM-12 沸石结构的变化,但嵌入框架后会影响酸性,与 Al-ZSM-12 相比,硼原子会增加总酸度并提供高浓度的布氏酸位点。同时,比表面积从 Al-ZSM-12 的 320 m g 增加到 B/Al-ZSM-12 的 350 m g。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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The synthesis and characterization of novel boron-containing B/Al-ZSM-12 zeolite

In this study, new type of boron-substituted Al-ZSM-12 was developed using hydrothermal synthesis technique and methyltriethylammonium chloride as a template; physical and chemical characteristics of B/Al-ZSM-12 were studied in detail. The presence of tetrahedral boron in the isomorphically substituted zeolite was confirmed by FTIR, Raman, DRS UV–Vis, DRIFTS, 29Si and 11B NMR, and ICP–MS methods. Due to the incorporation of boron into Al-ZSM-12 zeolite, the resulting crystallites of B/Al-ZSM-12 have a shorter b-axis length compared to unsubstituted Al-ZSM-12. Moreover, boron atoms do not affect the change in the structure of Al-ZSM-12 zeolite, while being embedded in the framework, affect acidic properties, increasing total acidity and a providing high concentration of Brønsted acid sites compared to Al-ZSM-12. Meanwhile, the surface area increases from 320 m2 g−1 for Al-ZSM-12 to 350 m2 g−1 for B/Al-ZSM-12.

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来源期刊
Materials Chemistry and Physics
Materials Chemistry and Physics 工程技术-材料科学:综合
CiteScore
8.70
自引率
4.30%
发文量
1515
审稿时长
69 days
期刊介绍: Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.
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