Beyond graphene oxides: Emerging 2D molecular sieve membranes for efficient separation

doi:10.1016/j.cjche.2018.08.019

Abstract

Abstract: Recent decades witnessed the significant progress made in the research field of 2D molecular sieve membranes. In comparison with their 3D counterparts, 2D molecular sieve membranes possessed several unique advantages like significantly reduced membrane thickness (one atom thick in theory) and diversified molecular sieving mechanisms (in-plane pores within nanosheets & interlayer galleries between nanosheets). M. Tsapatsis first carried out pioneering work on fabrication of lamellar ZSM-5 membrane. Since then, diverse 2D materials typically including graphene oxides (GOs) have been fabricated into membranes showing promising prospects in energy-efficient gas separation, pervaporation, desalination and nanofiltration. In addition to GOs, other emerging 2D materials, including 2D zeolites, 2D metal-organic frameworks (MOFs), 2D covalent-organic frameworks (COFs), layered double hydroxides (LDHs), transition metal dichalcogenides (TMDCs), MXenes (typically Ti₃C₂T_X), graphitic carbon nitrides (typically g-C₃N₄), hexagonal boron nitride (h-BN) and montmorillonites (MT) are showing intriguing performance in membrane-based separation process. This article summarized the most recent developments in the field of 2D molecular sieve membranes aside from GOs with particular emphasis on their structure-performance relationship and application prospects in industrial separation.

Key words: Two-dimentional material, Molecular sieves, Membranes, Separation, Desalination

摘要： Recent decades witnessed the significant progress made in the research field of 2D molecular sieve membranes. In comparison with their 3D counterparts, 2D molecular sieve membranes possessed several unique advantages like significantly reduced membrane thickness (one atom thick in theory) and diversified molecular sieving mechanisms (in-plane pores within nanosheets & interlayer galleries between nanosheets). M. Tsapatsis first carried out pioneering work on fabrication of lamellar ZSM-5 membrane. Since then, diverse 2D materials typically including graphene oxides (GOs) have been fabricated into membranes showing promising prospects in energy-efficient gas separation, pervaporation, desalination and nanofiltration. In addition to GOs, other emerging 2D materials, including 2D zeolites, 2D metal-organic frameworks (MOFs), 2D covalent-organic frameworks (COFs), layered double hydroxides (LDHs), transition metal dichalcogenides (TMDCs), MXenes (typically Ti₃C₂T_X), graphitic carbon nitrides (typically g-C₃N₄), hexagonal boron nitride (h-BN) and montmorillonites (MT) are showing intriguing performance in membrane-based separation process. This article summarized the most recent developments in the field of 2D molecular sieve membranes aside from GOs with particular emphasis on their structure-performance relationship and application prospects in industrial separation.

关键词: Two-dimentional material, Molecular sieves, Membranes, Separation, Desalination

Yi Liu. Beyond graphene oxides: Emerging 2D molecular sieve membranes for efficient separation[J]. Chinese Journal of Chemical Engineering, 2019, 27(6): 1257-1271.

Yi Liu. Beyond graphene oxides: Emerging 2D molecular sieve membranes for efficient separation[J]. 中国化学工程学报, 2019, 27(6): 1257-1271.

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