Direct Synthesis of High Aspect Ratio Zeolite Nanosheets
Zeolite Nanosheets with Nanometer Thicknesses
A newly developed direct synthesis method creates zeolite nanosheets with nanometer thicknesses and a high aspect ratio. The process creates zeolite nanosheets with enhanced mass transport properties within their nanopores, favorable to applications such as catalysis and separation. The nanosheets feature many desirable characteristics: predominant thickness of 5nm (2.5 unit cells), 0.6 nm straight pores down their thin dimension, and basal dimensions of several micrometers. For example, the material includes a planar layer of MFI zeolite where the planar layer ranges in thickness between 4 nm and 10 nm for at least 70% of a basal area of the planar layer. The direct synthesized nanosheets exhibited superior selectivity and flux compared to the state-of-the-art membranes made with exfoliated nanosheets or conventional crystals.
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Improved Zeolite Membrane
Previous methods of preparing zeolite nanosheets are time-consuming, costly, low-yield and result in fragmented nanosheets with sub-micrometer lateral dimensions. This direct synthesis method provides a viable path to high-aspect-ratio zeolite nanosheets, with improved yield at a lower cost.
BENEFITS AND FEATURES:
- Direct synthesis; easier to prepare
- Nanometer thicknesses: between 4 nm and 10 nm for at least 70% of a basal area of the planar layer
- Superior selectivity and flux
- Enhanced mass transport properties within their nanopores
- High aspect ratio
- Higher yield
- Potentially lower cost
- Zeolite membranes
- Chemical / petroleum separation equipment
- High-performance separation membranes
- Catalysis and separation
Phase of Development - Prototype developed
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