Sustainable Water Management with Photocatalytic Janus Mesh: Efficient Fog Harvesting, Water Purification, and Microbial Disinfection.

Water scarcity is a critical global challenge, especially in arid and semiarid regions. Fog harvesting has emerged as a promising solution; however, concerns about air pollution and bacterial growth in humid environments have raised doubts about the safety and sustainability of such systems. This study introduces a Janus mesh with asymmetric wettability on its two faces, fabricated through a simple and scalable method.