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 () and Huanting Wang ()
Additional contact information
Ruoxin Wang: Monash University
Jianhao Qian: University of Science and Technology of China
Xiaofang Chen: Monash University
Ze-Xian Low: Monash University
Yu Chen: Monash University
Hongyu Ma: Monash University
Heng-An Wu: University of Science and Technology of China
Cara M. Doherty: CSIRO Manufacturing
Durga Acharya: CSIRO Manufacturing
Zongli Xie: CSIRO Manufacturing
Matthew R. Hill: Monash University
Wei Shen: Monash University
Fengchao Wang: University of Science and Technology of China
Huanting Wang: Monash University

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract 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.

Date: 2023
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DOI: 10.1038/s41467-023-37932-9

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