摘要：This study focuses on developing effective methods for incorporating Zn species into the Silicalite-1 zeolite framework, leveraging the open structure of MFI zeolite subcrystals, to enhance its acidic properties for broader catalytic applications. This study developed a Zn-modified Silicalite-1 zeolite (ZnS-1-Sc) with enhanced acidic properties via the subcrystals in situ method. The ZnS-1-Sc showed a 3.9-fold increase in weak acid sites compared to unmodified Silicalite-1, confirmed by NH3-TPD and Py-IR. It also maintains a complete framework structure to exhibit excellent stability and hydrothermal stability, which was determined by UV-vis, XPS, FT-IR, 29Si MAS SSNMR and the hydrothermal stability test. In synthesizing pyridine bases, ZnS-1-Sc outperformed traditional HZSM-5, maintaining over 15% yield after 20 h versus less than 10% yield in 9 h. This study not only provides a new strategy for the metal modification of Silicalite-1 zeolite but also provides an important reference for the metal modification of other zeolite materials.

ISSN号：1932-7447

发表日期：2025-03-29

影响因子：0.000000

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）,EI（工程索引）

发表期刊名称：JOURNAL OF PHYSICAL CHEMISTRY C

通讯作者：薛西楠,陶金泉,贾亦静,白天瑜,黄文斌,郭世轩,张蕴梅

第一作者：周亚松,魏强

论文类型：期刊论文

论文概要：薛西楠,陶金泉,贾亦静,白天瑜,黄文斌,郭世轩,张蕴梅,周亚松,魏强，In Situ Synthesis of Zn/Silicalite-1 via Subcrystals: Constructing a Framework with Abundant Weak Acid Sites and High Stability，JOURNAL OF PHYSICAL CHEMISTRY C，2025，

论文题目：In Situ Synthesis of Zn/Silicalite-1 via Subcrystals: Constructing a Framework with Abundant Weak Acid Sites and High Stability