Enhanced quality of transfer-free graphene membrane for He/CH4 separation

Sepehr Nikkho,Maryam Mirzaei,Javad Karimi Sabet,Mohammad Ali Moosavian, Seyed Mahdi Hedayat

Separation and Purification Technology（2020）

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摘要

•Graphene membrane quality was improved and the tears/cracks were decreased.•Small holes were introduced into the copper foil via photolithography process.•The selectivity of 3.5 was achieved through the transfer-free graphene membrane.•The helium permeation through the graphene membrane was 1.19 × 10-5 mol/m2.pa.s.

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关键词

Graphene membrane,Chemical vapor deposition,Photolithography,Transfer-free,Intrinsic defects,Gas separation

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