Perspectives on the multi-functions of aniline: Cases from the temperature-controlled phase transfer hydrothermal synthesis of MWW zeolites
Microporous and Mesoporous Materials(2017)
摘要
The relationship between properties of aniline and its function was summarized concerning the hydrothermal synthesis of MWW zeolites with hexamethyleneimine as the structure-directing agent. Positive temperature-dependent solubility of aniline makes organics completely dissolved during crystallization and easily separated and recovered by liquid separation, which is defined as temperature-controlled phase transfer hydrothermal synthesis. For aniline, p-π conjunction significantly decreased basicity (determined by electronegativity) of amino groups, which accounted for poor charge-balancing and structure-directing capability. With hexamethyleneimine as the structure-directing agent, Aniline could promote crystallization as space-filling agent at much lower HMI/SiO2 ratio without being trapped within as-made MWW zeolites. Furthermore, the utilization of aniline as the structure-promoting agent could modify morphology into disorder packing of MWW platelets via directing gel method. HMI/SiO2 is the key to the distribution and stability of Al within final MWW zeolites. All referred advantages were originated from structure and properties of aniline. In future studies, efforts could be focused on property-oriented function design of hydrothermal synthesis.
更多查看译文
关键词
MWW zeolites,Hexamethyleneimine,Aniline,Structure-directing agent,Structure-promoting agent,Temperature-controlled phase transfer hydrothermal synthesis
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要