Hierarchical SSZ-13 was successfully synthesized via the interzeolite conversion of ZSM-5 with high framework density (FD = 18.4 T/1000 ų) in the presence of N,N,N-trimethyl-1-adamantanamine hydroxide (TMAdaOH) under hydrothermal conditions. Compared with conventional SSZ-13, SSZ-13 derived from the interzeolite conversion of ZSM-5 possessed many merits, such as a shorter crystallization time (only 4 h), high crystallinity, high yield (73–77%), hierarchical pores, and smaller crystal size (800 nm). XRD, SEM and N₂ adsorption–desorption were used to trace the crystallization process, which allowed us to propose the synthesis mechanism of converting ZSM-5 to SSZ-13. Meanwhile, the interzeolite conversion mechanism was presumed to be that the secondary structural unit of ZSM-5 was decomposed through alkali solution treatment, and the multi-membered rings were destroyed, further reassembling into SSZ-13 under the guidance of the template. This is an alternative strategy for synthesizing a hierarchical SSZ-13 zeolite.

中文翻译：

---

通过ZSM-5的分子筛转变快速轻松地合成分级纳米晶体SSZ-13

分层SSZ-13成功地合成通过ZSM-5的高密度框架（FD = 18.4 T / 1000埃的interzeolite转换³中的存在）Ñ，Ñ，ñ -三甲基- 1-金刚烷胺氧化钾（TMADAOH）下的水热条件。与传统的SSZ-13相比，由ZSM-5分子筛转化得到的SSZ-13具有许多优点，例如结晶时间更短（仅4 h），高结晶度，高产率（73-77％），分层的孔，和更小的晶体尺寸（800 nm）。XRD，SEM和N ₂吸附-解吸用于追踪结晶过程，这使我们提出了将ZSM-5转化为SSZ-13的合成机理。同时，推测沸石间的转化机理是通过碱溶液处理分解了ZSM-5的二级结构单元，破坏了多元环，并在模板的指导下进一步组装成SSZ-13。这是合成分级SSZ-13沸石的另一种策略。