Synergistic Photothermal Effect of the Wood-SnS-AgNPs for Efficient Solar-Driven Steam Generation

The solar-driven interfacial evaporation system has attracted much attention in recent years because it avoids dissipating a large amount of energy into the bulk water. As one of the photothermal materials in solar-driven interfacial evaporation system, wood has been widely applied due to its excellent properties, such as lower density, open micropores, capillary-induced hydrophilic nature, and low thermal conductivity. However, the complex processing technology and relatively low efficiency of wood-based photothermal materials limit their application. Herein, to solve these problems, solvothermal and immersion treatment methods by depositing tin sulfide and silver nanoparticles (AgNPs) have been demonstrated. The solar absorption rate of wood-SnS-AgNPs is higher than 98% in a wide wavelength range (200-2,500 nm). Results demonstrate that an evaporation rate of 1.53 kg m(-2) h(-1) and evaporation efficiency (90.12%) are achieved under 1-sun illumination (100 mW cm(-2)). The harsh environmental test indicates that the solar-driven interfacial evaporation system based on wood-SnS-AgNPs has excellent structural stability and purification ability of seawater.