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US 12,472,473 B2Granted
Process for graphene membranes lattice engineering and uses thereof
AssigneeGaznat SA
InventorsKumar Varoon Agrawal, Shiqi Huang, Kuang-Jung Hsu
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Abstract
The invention relates to a millisecond gasification method to fabricate graphene membranes, yielding a molecular sieving resolution of 0.2 Å for selective gas separation, and further relates to a method of preparation and uses thereof. In particular, the invention relates to the graphene membranes that have large CO2 permeances combined with attractive CO2/N2 and CO2/CH4 selectivity.
Claims13
A method for the preparation of a gas selective separation filter comprising the steps of:
- a) providing a graphene membrane on a sacrificial support layer;
- b) subjecting said graphene membrane to one or more transient ozone gas pulses at a reactor temperature between 120 to 300° C.;
- c) purging ozone from the reactor chamber during or right after the transient pressurized ozone gas pulse;
- and
- d) cooling down the ozone treated graphene membrane to room temperature, wherein each transient ozone gas pulse lasts for 0.01 to 0.3 second.
2 more elements
Dependencies are inferred from the claim text.