Defects in AHFS-dealuminated Y zeolite: A crucial factor for mesopores formation in the following base treatment procedure
Defects in AHFS-dealuminated Y zeolite: A crucial factor for mesopores formation in the following base treatment procedure
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AHFS 脱铝 Y 沸石的缺陷：后续碱处理过程中中孔形成的关键因素
DOI：
10.1016/j.micromeso.2017.07.046
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发表时间：
2018
影响因子：
5.2
通讯作者：
Shen Baojian
中科院分区：
文献类型：
--
作者：
Li Cheng;Guo Linlin;Liu Peng;Gong Ke;Jin Wenlong;Li Lei;Zhu Xiaochun;Liu Xianchun;Shen Baojian
介孔分子筛由于其在催化反应中的性能较常规微孔分子筛有了很大的提高而引起了人们的极大兴趣。在此，我们将报告一个策略，包括顺序六氟硅酸铵（AHFS）和碱处理制备介孔Y沸石。得到的中孔Y沸石具有高的总孔体积（0.720cm3g-1）和中孔体积（0.453cm3g-1）。此外，还实现了不同孔隙之间良好连通的目的。结果表明，AHFS处理在随后的碱处理过程中对介孔的形成起着至关重要的作用。AHFS处理后形成了富硅区，富硅区中充满了缺陷。这些区域是不稳定的，并且容易在碱溶液中从沸石骨架中去除以生成介孔。同时，这些缺陷也为地基处理提供了途径，使地基处理更加有效。该组合处理实现了通过缺陷诱导中孔形成的目的。以1，3，5-三异丙苯（TIPB）为裂解反应对象，考察了分子筛的催化性能。结果表明，催化剂的活性与分子筛的中孔结构密切相关。
Mesoporous zeolites have gained a great interest because of their improved performance in catalyzed reactions compared with conventional microporous zeolites. Herein, we would like to report a strategy containing sequential ammonium hexafluorosilicate (AHFS) and base treatment to prepare mesoporous Y zeolite. The obtained mesoporous Y zeolite possessed high total pore volume (0.720 cm3g−1) and mesopore volume (0.453 cm3g−1). Furthermore, the goal of well interconnectivity among different pores has also been achieved. It has been found that AHFS treatment played a crucial role in the formation of mesopores during the following base treatment procedure. Si-rich areas, which were full of defects, formed after AHFS treatment. These areas were unstable and easy to remove from the zeolite framework in base solution to generate mesopores. Meanwhile, the defects provided paths for base treatment and made it more effective. The combined treatment achieved a goal of inducing mesopores formation by defects. Catalytic performance of the zeolites were evaluated by cracking of 1,3,5-triisopropylbenzene (TIPB). The result showed that catalytic activity was closely related to the upgraded mesoporosity system of the zeolites.
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影响因子：
7.3
作者：
Mi, Shuo;Wei, Tao;Shen, Baojian
通讯作者：
Shen, Baojian
研究沸石纳米晶晶种在合成具有沸石壁结构的介孔催化剂中的作用
影响因子：
8.6
作者：
Wang, Xiaobin;Zhang, Xiongfu;Yeung, King Lun
通讯作者：
Yeung, King Lun
影响因子：
19
作者：
D. Verboekend;G. Vilé;J. Pérez–Ramírez
通讯作者：
D. Verboekend;G. Vilé;J. Pérez–Ramírez
影响因子：
12.9
作者：
T. Keller;J. Arras;S. Wershofen;J. Pérez–Ramírez
通讯作者：
T. Keller;J. Arras;S. Wershofen;J. Pérez–Ramírez
影响因子：
7.3
作者：
Groen, Johan C.;Sano, Tsuneji;Perez-Ramirez, Javier
通讯作者：
Perez-Ramirez, Javier