التفاصيل البيبلوغرافية
| العنوان: |
In Situ Imaging of Faujasite Surface Growth Reveals Unique Pathways of Zeolite Crystallization |
| المؤلفون: |
Rishabh Jain (1315263), Zhiyin Niu (7588721), Madhuresh Choudhary (14334601), Hadi Bourji (14334604), Jeremy C. Palmer (1275303), Jeffrey D. Rimer (1510321) |
| سنة النشر: |
2023 |
| مصطلحات موضوعية: |
Medicine, Microbiology, Ecology, Environmental Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, elemental analysis shows, complex processes involving, diverse solute species, commercially relevant zeolite, fau crystallization raise, conventional fau synthesis, original growth mixture, growth occurs predominantly, fau zeolite product, supernatant solutions extracted, prepare zeolites leads, dilute clear solution, crystal surfaces via, supernatant solutions, zeolite synthesis, zeolite crystallization, fau ), processes occur, zeolite structures, zeolite frameworks, state species, soluble species, growth pathway, growth mechanism |
| الوصف: |
Zeolite crystallization occurs by complex processes involving a variety of possible mechanisms. The sol gel media used to prepare zeolites leads to heterogeneous mixtures of solution and solid states with diverse solute species. At later stages of zeolite synthesis when growth occurs predominantly from solution, classical two-dimensional nucleation and spreading of layers on crystal surfaces via the addition of soluble species is the dominant pathway. At earlier stages, these processes occur in parallel with nonclassical pathways involving crystallization by particle attachment (CPA). The relative roles of solution- and solid-state species in zeolite crystallization have been a subject of debate. Here, we investigate the growth mechanism of a commercially relevant zeolite, faujasite (FAU). In situ atomic force microscopy (AFM) measurements reveal that supernatant solutions extracted from a conventional FAU synthesis at various times do not result in growth, indicating that FAU growth predominantly occurs from the solid state through a disorder-to-order transition of amorphous precursors. Elemental analysis shows that supernatant solutions are significantly more siliceous than both the original growth mixture and the FAU zeolite product; however, in situ AFM studies using a dilute clear solution with a lower Si/Al ratio revealed three-dimensional growth of surfaces that is distinct from layer-by-layer and CPA pathways. This unique mechanism of growth differs from those observed in studies of other zeolites. Given that relatively few zeolite frameworks have been the subject of mechanistic investigation by in situ techniques, these observations of FAU crystallization raise the question whether its growth pathway is characteristic of other zeolite structures. |
| نوع الوثيقة: |
dataset |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/media/In_Situ_Imaging_of_Faujasite_Surface_Growth_Reveals_Unique_Pathways_of_Zeolite_Crystallization/21824638 |
| DOI: |
10.1021/jacs.2c10839.s004 |
| الاتاحة: |
https://doi.org/10.1021/jacs.2c10839.s004 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.3FF9C8A8 |
| قاعدة البيانات: |
BASE |