Recent innovations highlight the great potential of two-dimensional graphene oxide (GO) films in water-related applications.However,undesirable water-induced effects,such as the redispersion and peeling of stacked GO laminates, greatly limit their performance and impact their practical application. It remains ag reat challenge to stabilizeG O membranes in water.Amolecular bridge strategy is reported in which an interlaminar short-chain molecular bridge generates ar obust GO laminate that resists the tendency to swell. Furthermore,a ni nterfacial long-chain molecular bridge adheres the GO laminate to ap orous substrate to increase the mechanical strength of the membrane.B yr ationally creating and tuning the molecular bridges,t he stabilized GO membranes can exhibit outstanding durability in harsh operating conditions,s uch as cross-flow, high-pressure,a nd longterm filtration. This general and scalable stabilizing approach for GO membranes provides new opportunities for reliable two-dimensional laminar films used in aqueous environments.

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Graphene oxide (GO), as a representative two-dimensional material, has shown great prospect in developing high-performance separation membranes via forming ordered and tunable nanochannels. However, for aqueous molecular separations, the implementation of an excellent separation performance remains a critical challenge due to the membrane swelling phenomenon and the trade-off effect between permeation flux and separation factor. Herein, a facile and tunable approach is presented for introducing water transport promoters into GO interlayer channels to construct water transport highways. The combination of covalently cross-linked channel structure, facilitated water-selective sorption, and expedited water-preferential diffusion overcome the trade-off effect, achieving a superior performance from an ultrathin GO membrane with a flux of 5.94 kg/m 2 •h and a water/butanol separation factor of 3,965, which exceeds the performance of state-of-the-art membranes for water/ butanol separation. The strategy proposed here is straightforward, holding great potential to produce high-efficiency GO and other two-dimensional (2D)-material membranes for precise aqueous molecular separations.

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