Solar thermal conversion (STC) evaporation is a practical and sustainable technology for seawater desalination and sewage abatement. However, both the limited evaporation efficiency and long-term conversion stability restrain its practical application. Herein, a lotus morphology-inspired biomimetic evaporator (MBE) with Janus wettability and bimodal pores is well designed for high-rate and enduring STC evaporation. Just like lotus leaves, the hydrophobic surface of the MBE cuts off the capillarity of water, hence achieving high-efficient salt resistance and solar absorption, while the hydrophilic substance provides fast water transportation. The bimodal-pore structures formed by incorporating lotus root-like mesopores into the 3D truss-like macropores effectively decrease density and thermal conductivity for self-floating and thermal regulation. This results in a low water vaporization enthalpy of 1846 J g⁻¹, leading to a much higher evaporation rate at the same conversion efficiency. This work may open new avenues for developing high-performance evaporation systems.

太阳热转换（STC）蒸发是一种用于海水淡化和减少污水排放的实用且可持续的技术。然而，有限的蒸发效率和长期转化稳定性都限制了其实际应用。本文中，具有Janus润湿性和双峰孔的莲花形貌仿生蒸发器（MBE）是为高速率和持久的STC蒸发而精心设计的。就像荷叶一样，MBE的疏水性表面切断了水的毛细作用，从而实现了高效的耐盐性和日光吸收，而亲水性物质提供了快速的水传输。通过将lotus样中孔合并到3D桁架状大孔中而形成的双峰结构有效降低了密度和导热率，从而实现了自我漂浮和热调节。^-1，在相同的转换效率下导致更高的蒸发速率。这项工作可能会为开发高性能蒸发系统开辟新的途径。