Ultrathin, Molecular-Sieving Graphene Oxide Membranes for Selective Hydrogen Separation

Author:

Li Hang12,Song Zhuonan12,Zhang Xiaojie12,Huang Yi12,Li Shiguang3,Mao Yating1,Ploehn Harry J.1,Bao Yu4,Yu Miao12

Affiliation:

1. Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA.

2. Catalysis for Renewable Fuels Center, University of South Carolina, Columbia, SC 29208, USA.

3. Gas Technology Institute, 1700 South Mount Prospect Road, Des Plaines, IL 60018, USA.

4. College of Applied Science and Technology, Rochester Institute of Technology, Rochester, NY 14623, USA.

Abstract

Gas Separations When gas separation membranes are made thinner, they usually allow permeating gases to pass through faster. However, a thinner membrane may be poorer at separating between gas species. Kim et al. (p. 91 ) examined the permeability and selectivity of layered graphene and graphene oxide membranes. Gas molecules diffuse through defective pores and channels that form between the layers. Controlling these structures tuned the properties of the membranes to allow the extraction of carbon dioxide from other gases. Li et al. (p. 95 ) describe membranes as thin as 1.8 nanometers made from only two to three layers of graphene oxide. Small defects within the layers allowed hydrogen to pass through, separating it from carbon dioxide and nitrogen.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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