Dual-hydrophilic Janus evaporator for Long-term and efficient Bimode solar evaporation

•The dual-hydrophilic Janus-structure evaporator was fabricated by a low-cost and facial strategy.•The evaporator achieves highly efficient solar evaporation and flexible salt manipulation.•Enhancing energy confinement is achieved by encapsulation structure.•Inclined structure of the evaporator endows the unidirectional transportation of ions.