Interfacial solar desalination shows great promise to become an alternative technique for freshwater generation. However, the unavoidable fouling undermines continuous evaporation because the accumulated salt crystals weaken sunlight absorption and salt drainage, especially in high-salinity brines. Therefore, developing a photothermal evaporator with excellent salt rejection capability is urgent for high-salinity solar desalination. Here, a carbonized cattle manure-based photothermal evaporator with hierarchically bimodal pores is validated as an efficient desalinator for high-salinity brine (≥15 wt%). Taking advantage of the bimodally porous structure and interconnected microchannels formed by carbon fiber networks, it realizes rapid water transportation and quickly replenishes the surface-desalinated brine to prevent salt accumulation and enable stable freshwater generation. This carbonized manure evaporation device demonstrates a rapid evaporation rate of 2.25 kg m⁻² h⁻¹ under 1 sun irradiance (1 kW m⁻²) using a 15 wt% NaCl solution, as well as excellent long-term stability for the high-salinity desalination process. The nano-sized channels offer efficient nanoscale light trapping through multiple reflections and scatterations that occur within the channel walls. Furthermore, the abundance of raw materials provides a desirable and efficient approach for converting farm waste to energy, making it particularly well-suited for developing regions.

界面太阳能海水淡化显示出成为淡水生产替代技术的巨大希望。然而，不可避免的污垢会破坏连续蒸发，因为积累的盐晶体会削弱阳光吸收和盐分排放，尤其是在高盐度盐水中。因此，开发一种具有优良脱盐能力的光热蒸发器是高盐度太阳能海水淡化的迫切需要。在这里，基于碳化牛粪的具有分级双峰孔的光热蒸发器被验证为高盐度盐水（≥15 wt%）的有效脱盐器。利用碳纤维网络形成的双峰多孔结构和相互连接的微通道，实现快速输水，快速补充地表淡化卤水，防止盐分堆积，稳定产淡水。这种碳化粪肥蒸发装置展示了 2.25 kg m 的快速蒸发率^-2  h ^-1在 1 太阳辐照度 (1 kW m ^-2 ) 下使用 15 wt% NaCl 溶液，以及高盐度脱盐过程的出色长期稳定性。纳米级通道通过通道壁内发生的多次反射和散射提供有效的纳米级光捕获。此外，丰富的原材料为将农场废物转化为能源提供了一种理想而有效的方法，使其特别适合发展中地区。