Pyro-layered heterostructured nanosheet membrane for hydrogen separation

Ruoxin Wang, Jianhao Qian, Xiaofang Chen, Ze-Xian Low, Yu Chen, Hongyu Ma, Heng-An Wu, Cara M. Doherty, Durga Acharya, Zongli Xie, Matthew R. Hill, Wei Shen, Fengchao Wang, Huanting Wang

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2 Citations (Scopus)


Engineering different two-dimensional materials into heterostructured membranes with unique physiochemical properties and molecular sieving channels offers an effective way to design membranes for fast and selective gas molecule transport. Here we develop a simple and versatile pyro-layering approach to fabricate heterostructured membranes from boron nitride nanosheets as the main scaffold and graphene nanosheets derived from a chitosan precursor as the filler. The rearrangement of the graphene nanosheets adjoining the boron nitride nanosheets during the pyro-layering treatment forms precise in-plane slit-like nanochannels and a plane-to-plane spacing of ~3.0 Å, thereby endowing specific gas transport pathways for selective hydrogen transport. The heterostructured membrane shows a high H2 permeability of 849 Barrer, with a H2/CO2 selectivity of 290. This facile and scalable technique holds great promise for the fabrication of heterostructures as next-generation membranes for enhancing the efficiency of gas separation and purification processes.

Original languageEnglish
Article number2161
Number of pages10
JournalNature Communications
Issue number1
Publication statusPublished - 15 Apr 2023

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