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<p>Pervaporation provides a selective route to high purity solvents that are indispensable for high precision industry. Here, we introduce structurally engineered nanoporous graphene oxide membranes (N-GOm), obtained by heterogeneous co-assembly of nanoporous graphene oxide (NPGO) and GO nanosheets. The NPGO nanosheet characterized by nanoporous <i>sp</i><sup>3</sup> carbon domains and oxygen functionalized groups, synergistically increases water affinity, effectively elevating the water adsorption energies (E<sub>ads</sub>). The N-GOm integrates defective <i>sp</i><sup>3</sup><i>/sp</i><sup>2</sup> heterogeneous stacked cavity to facilitate water transport, effectively improve the solution self-diffusion coefficient (<i>D</i>), thereby improve diffusion activation energy (E<sub>D</sub>) indirectly, while graphitic <i>sp</i><sup>2</sup>-stacked regions ensure stable structure and enable precise molecular sieving. Here, the thermal crosslinking rN-GOm achieves a remarkable flux of 18.4 kg·m<sup>-2</sup>·h<sup>-1</sup>, highlighting the potential for industrial solvent dehydration. These complementary structural properties enable rapid and highly selective transport via densely packed sieving channels and interconnected internal pathways, providing atomistic insight into how carbon microenvironment and stacking structure regulate adsorption and diffusion in ultrathin two-dimensional membranes.</p>

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Solvent dehydration with structurally engineered nanoporous graphene oxide membranes

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月4日

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  • Lei Jiang,
  • Pengrui Jin,
  • Shushan Yuan,
  • Ziwen Dai,
  • Tingting Luo,
  • Tianze Hu,
  • Yue Wang,
  • Xin Xiao,
  • Xiaoming Xu,
  • Huanting Wang,
  • Bart Van der Bruggen

摘要

Pervaporation provides a selective route to high purity solvents that are indispensable for high precision industry. Here, we introduce structurally engineered nanoporous graphene oxide membranes (N-GOm), obtained by heterogeneous co-assembly of nanoporous graphene oxide (NPGO) and GO nanosheets. The NPGO nanosheet characterized by nanoporous sp3 carbon domains and oxygen functionalized groups, synergistically increases water affinity, effectively elevating the water adsorption energies (Eads). The N-GOm integrates defective sp3/sp2 heterogeneous stacked cavity to facilitate water transport, effectively improve the solution self-diffusion coefficient (D), thereby improve diffusion activation energy (ED) indirectly, while graphitic sp2-stacked regions ensure stable structure and enable precise molecular sieving. Here, the thermal crosslinking rN-GOm achieves a remarkable flux of 18.4 kg·m-2·h-1, highlighting the potential for industrial solvent dehydration. These complementary structural properties enable rapid and highly selective transport via densely packed sieving channels and interconnected internal pathways, providing atomistic insight into how carbon microenvironment and stacking structure regulate adsorption and diffusion in ultrathin two-dimensional membranes.