Ions transport through confined space with characteristic dimensions comparable to the Debye length has many applications, for example, in water desalination, dialysis, and energy conversion. However, existing 2D/3D smart porous membranes for ions transport and further applications are fragile, thermolabile, and/or difficult to scale up, limiting their practical applicability. Now, polymeric carbon nitride alternatively allows the creation of an ultrathin free‐standing carbon nitride membrane (UFSCNM), which can be fabricated by simple CVD polymerization and exhibits excellent nanofluidic ion‐transport properties. The surface‐charge‐governed ion transport also endows such UFSCNMs with the function of converting salinity gradients into electric energy. With advantages of low cost, facile fabrication, and the ease of scale up while supporting high ionic currents, UFSCNM can be considered as an alternative for energy conversion systems and new ionic devices.

中文翻译：

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通过超薄自由站立式聚合氮化碳膜进行纳流离子迁移和能量转换

离子通过具有与德拜长度相当的特征尺寸的密闭空间传输的方法有许多应用，例如在水脱盐，透析和能量转换中。然而，现有的用于离子传输和进一步应用的2D / 3D智能多孔膜易碎，不耐热和/或难以扩大规模，限制了它们的实际适用性。现在，聚合氮化碳可以创建超薄的自支撑氮化碳膜（UFSCNM），该膜可以通过简单的CVD聚合反应制成，并具有出色的纳米流体离子传输性能。由表面电荷控制的离子迁移还赋予此类UFSCNM盐度梯度转化为电能的功能。凭借低成本，制造简便的优势，