As one of core components in solar-driven interfacial evaporation system, photo-thermal conversion material still confronts a challenge to achieve superior optical absorption combined with excellent evaporation performance. In this work, a CuS-Multi walled carbon nanotube (MWCNT) composite was synthesized and a photo-thermal conversion membrane with CuS-MWCNT composite was prepared for solar steam generation. The experi-mental results showed that the CuS-MWCNT membrane hastened the conversion of water to steam, matching 1.58 kg m(-2)h(-1) evaporation rate and 95.0% evaporation efficiency. Further, the evaporator with CuS-MWCNT membrane demonstrated superior durability with excellent evaporation performance, indicating that it was a promising candidate for solar-driven interfacial evaporation.

In this work, we in situ synthesized C-CuO composite by a facile solid phase grinding for efficient photo-thermal conversion. Moreover, surface morphology, hydrophilicity property, light absorption characteristic, and evaporation performance were investigated on C-CuO membrane. It can be seen that C-CuO composite was well dispersed on the membrane, prompting light harvesting and intentionally encouraging water evaporation. The surface hydrophilicity assisted valid water flow by the membrane toward the heat localization zone and smooth steam escape. At a calcination temperature of 250 degrees C and a mass ratio of 1:1 regarding the preparation of C-CuO composite, surface temperature of C-CuO membrane reached to the maximum value around 87.4 degrees C, noticeably stimulating the conversion of water to vapor. Further, the evaporation system with 0.015 g C-CuO composite loading possessed top-quality evaporation performance with superior recyclability, which mirrored to 92.6% evaporation efficiency and 1.34 kg m(-2) hours(-1) evaporation rate after 30 minutes exposure to light, respectively. Our work suggested that in situ synthesized C-CuO composite was regarded as a potential alternative for clean water production by solar-driven interfacial evaporation.