The　transport　behaviors　of　aqueous　solution　in　two-dimensional　(2D)　nanomaterial-based　separation　membranes　are　correlated　with　the　structure　of　the　nanoconfined　geometry.　However,　little　is　known　about　the　impact　of　asymmetric　structures　on　the　transport　behavior　of　aqueous　solutions　in　membranes.　In　this　work,　we　use　molecular　dynamics　(MD)　simulations　to　investigate　the　transport　behaviors　of　aqueous　solution　in　non-parallel　stacked　graphitic　carbon　nitride　(g-C3N4)　nanochannels.　Interestingly,　the　non-parallel　stacking　of　g-C3N4　could　lead　to　the　local　aggregation　of　water,　resulting　in　an　inhomogeneous　density　distribution　within　the　nanochannel.　The　high-density　region　in　g-C3N4　nanochannel　significantly　disrupted　the　continuum　fluid　of　water.　Moreover,　the　inhomogeneous　density　distribution　of　water　could　impede　ion　transport　in　the　non-parallel　g-C3N4　nanochannel.　It　was　found　that　ions　cannot　maintain　compact　hydration　structures　in　the　high-density　region.　This　work　reveals　the　unique　properties　of　slightly　tilted　membrane　structures,　providing　novel　perspective　for　the　design　of　next-generation　nanofluidic　devices.　©　2024　Elsevier　B.V.