Controlled direct synthesis of single- to multiple-layer MWW zeolite.
Controlled direct synthesis of single- to multiple-layer MWW zeolite.
复制标题
单层至多层MWW沸石的受控直接合成
DOI：
10.1093/nsr/nwaa236
复制
发表时间：
2021-07
影响因子：
20.6
通讯作者：
Liu ZW
中科院分区：
文献类型：
--
作者：
Chen JQ;Li YZ;Hao QQ;Chen H;Liu ZT;Dai C;Zhang J;Ma X;Liu ZW
沸石分子筛的最小扩散限制和完全暴露的强酸中心使其成为工业上重要的催化剂，特别是用于转化大分子。然而，该材料的结构控制和大规模合成仍然是一个挑战。本论文以六亚甲基亚胺和两亲性有机硅烷为结构导向剂，采用直接合成法合成了单层MWW分子筛。表征结果证实了具有高结晶度和优异的热/水热稳定性的单层MWW沸石的形成。形成机制被严格揭示为MWW纳米晶体的成核/生长和有机硅烷掺入MWW晶胞之间的平衡速率，这进一步支持通过简单地改变合成条件形成具有可调厚度的MWW纳米片。该催化剂具有原料易得、结构可控性好、对苯与1-十二烯烷基化反应稳定性高等优点，是一种重要的工业催化剂。
Abstract The minimized diffusion limitation and completely exposed strong acid sites of the ultrathin zeolites make it an industrially important catalyst especially for converting bulky molecules. However, the structure-controlled and large-scale synthesis of the material is still a challenge. In this work, the direct synthesis of the single-layer MWW zeolite was demonstrated by using hexamethyleneimine and amphiphilic organosilane as structure-directing agents. Characterization results confirmed the formation of the single-layer MWW zeolite with high crystallinity and excellent thermal/hydrothermal stability. The formation mechanism was rigorously revealed as the balanced rates between the nucleation/growth of the MWW nanocrystals and the incorporation of the organosilane into the MWW unit cell, which is further supported by the formation of MWW nanosheets with tunable thickness via simply changing synthesis conditions. The commercially available reagents, well-controlled structure and the high catalytic stability for the alkylation of benzene with 1-dodecene make it an industrially important catalyst.
登录
查看更多内容
影响因子：
4
作者：
Diaz, Urbano;Corma, Avelino
通讯作者：
Corma, Avelino
影响因子：
20.6
作者：
Peng P;Gao XH;Yan ZF;Mintova S
通讯作者：
Mintova S
影响因子：
8.4
作者：
Luo HY;Michaelis VK;Hodges S;Griffin RG;Román-Leshkov Y
通讯作者：
Román-Leshkov Y
影响因子：
15
作者：
Maheshwari, Sudeep;Jordan, Edgar;Tsapatsis, Michael
通讯作者：
Tsapatsis, Michael
影响因子：
3.9
作者：
Dugkhuntod, Pannida;Imyen, Thidarat;Wannapakdee, Wannaruedee;Yutthalekha, Thittaya;Salakhum, Saros;Wattanakit, Chularat
通讯作者：
Wattanakit, Chularat