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Issue 19, 2013
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Helium separation via porous silicene based ultimate membrane

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Abstract

Helium purification has become more important for increasing demands in scientific and industrial applications. In this work, we demonstrated that the porous silicene can be used as an effective ultimate membrane for helium purification on the basis of first-principles calculations. Prinstine silicene monolayer is impermeable to helium gas with a high penetration energy barrier (1.66 eV). However, porous silicene with either Stone–Wales (SW) or divacancy (555 777 or 585) defect presents a surmountable barrier for helium (0.33 to 0.78 eV) but formidable for Ne, Ar, and other gas molecules. In particular, the porous silicene with divacancy defects shows high selectivity for He/Ne and He/Ar, superior to graphene, polyphenylene, and traditional membranes.

Graphical abstract: Helium separation via porous silicene based ultimate membrane

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Publication details

The article was received on 07 May 2013, accepted on 03 Jul 2013 and first published on 11 Jul 2013


Article type: Paper
DOI: 10.1039/C3NR02326E
Citation: Nanoscale, 2013,5, 9062-9066
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    Helium separation via porous silicene based ultimate membrane

    W. Hu, X. Wu, Z. Li and J. Yang, Nanoscale, 2013, 5, 9062
    DOI: 10.1039/C3NR02326E

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