Chemistry

Lamellar carbon nitride membrane for enhanced ion sieving and water desalination

Y. Wang, T. Lian, et al.

This innovative research by Yang Wang, Tingting Lian, Nadezda V. Tarakina, Jiayin Yuan, and Markus Antonietti introduces a chemically robust 2D carbon nitride membrane that achieves over 99.5% salt rejection and an impressive water flux of 6 L m² h⁻¹ in forward osmosis. With its tunable permeation, this membrane showcases potential for water gating in varying pH environments, marking a significant advancement in water desalination technology.

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Abstract

This paper reports on a chemically robust 2D carbon nitride membrane activated using aluminum polycations as pillars to modulate interlayer spacing. This creates a well-interlinked lamellar structure that exhibits excellent swelling resistance, achieving high salt rejection (>99.5%) and water flux (6 L m² h⁻¹) in forward osmosis. The membrane's tunable permeation behavior enables water gating in acidic and alkaline environments, positioning carbon nitride as a promising building block for water desalination and purification membranes.

Publisher

Nature Communications

Published On

Nov 29, 2022

Authors

Yang Wang, Tingting Lian, Nadezda V. Tarakina, Jiayin Yuan, Markus Antonietti

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