Abstract
Presently it is understood that 18-crown-6 ether is necessary as an organic template to synthesise pure and well crystalline EMT-type zeolites. This is problematic for optimisation of organic-free synthesis of zeolites. We report a new method to synthesise pure zeolite EMC-2 using a lower amount of 18-crown-6 ether than previously reported. At these low 18-crown-6 ether concentrations, FAU-type zeolites were not seen to co-crystallise. We observe that the crystallinity of the EMT-type zeolite is proportional to the amount of 18-crown-6 ether added in the synthesis. The as-synthesised zeolites were characterised using X-ray powder diffraction, scanning electron microscopy and solid state nuclear magnetic resonance. These findings are a crucial step towards understanding template roles and designing syntheses for zeolites without the use of toxic organic templates.
Original language | English |
---|---|
Pages (from-to) | 261-270 |
Number of pages | 10 |
Journal | Microporous and Mesoporous Materials |
Volume | 255 |
Early online date | 24 Aug 2017 |
DOIs | |
Publication status | Published - 1 Jan 2018 |
Keywords
- EMC-2
- EMT
- FAU
- NMR
- OSDA
- PXRD
- SEM
- Synthesis
- Zeolite
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials