Graphene oxide (GO) is regarded as a promising candidate to construct solar absorbers for addressing freshwater crisis, but the easy delamination of GO in water poses a critical challenge for practical solar desalination. Herein, we improve the stability of GO membranes by a self-crosslinking poly (ionic liquid) (PIL) in a mild condition, which crosslinks neighbouring GO nanosheets without blemishing the hydrophilic structure of GO. By further adding carbon nanotubes (CNTs), the sandwiched GO/CNT@PIL (GCP) membrane displays a good stability in pH = 1 or 13 solution even for 270 days. The molecular dynamics simulation results indicate that the generation of water nanofluidics in nanochannels of GO nanosheets remarkably reduces the water evaporation enthalpy in GCP membrane, compared to bulk water. Consequently, the GCP membrane exhibits a high evaporation rate (1.87 kg m⁻² h⁻¹) and displays stable evaporation rates for 14 h under 1 kW m⁻² irradiation. The GCP membrane additionally works very well when using different water sources (e.g., dye-polluted water) or even strong acidic solution (pH = 1) or basic solution (pH = 13). More importantly, through bundling pluralities of GCP membrane, an efficient solar desalination device is developed to produce drinkable water from seawater. The average daily drinkable water amount in sunny day is 10.1 kg m⁻², which meets with the daily drinkable water needs of five adults. The high evaporation rate, long-time durability and good scalability make the GCP membrane an outstanding candidate for practical solar seawater desalination.

氧化石墨烯 (GO) 被认为是构建解决淡水危机的太阳能吸收器的有前途的候选者，但 GO 在水中容易分层对实际太阳能海水淡化提出了严峻挑战。在此，我们在温和条件下通过自交联聚（离子液体）（PIL）提高了 GO 膜的稳定性，它交联相邻的 GO 纳米片而不破坏 GO 的亲水结构。通过进一步添加碳纳米管 (CNT)，夹层式 GO/CNT@PIL (GCP) 膜在 pH = 1 或 13 的溶液中表现出良好的稳定性，甚至可以保持 270 天。分子动力学模拟结果表明，与散装水相比，GO 纳米片的纳米通道中水纳米流体的产生显着降低了 GCP 膜中的水蒸发焓。最后，⁻²  h ^{−1 ) 并在 1 kW m −2}辐照下显示稳定的蒸发速率 14 小时。此外，GCP 膜在使用不同的水源（例如染料污染水）甚至强酸性溶液 (pH = 1) 或碱性溶液 (pH = 13) 时也能很好地工作。更重要的是，通过捆绑多个 GCP 膜，开发了一种高效的太阳能海水淡化装置，可以从海水中生产饮用水。晴天日均饮水量为10.1 kg m ^-2，可满足5个成年人每日饮水需求。高蒸发率、长时间耐用性和良好的可扩展性使 GCP 膜成为实用的太阳能海水淡化的杰出候选者。