Superhydrophobic MnO2 based solar evaporator with interface heating principle and its application in Rh B photodegradation

Environmental governance and clean water production are the challenges that human face. In this paper, the device composed of superhydrophobic layer, hydrophilic channel and photothermal conversion layer was fabricated. The superhydrophobic layer has a contact angle of 162°, which not only ensures the floating of the device, but also has the ability to selectively absorb non-water-soluble pollutants. In addition, the surface-loaded Bi 2 MoO 6 /Bi 2 O 3 photocatalyst can also degrade the water-soluble pollutants. After 4 cycles of photodegradation, the degradation efficiency was 92.6 %, demonstrating a stable degradation stability. The optimal content of MnO 2 (60 mg) was demonstrated by steam production rate experiments. The mechanical stability of superhydrophobic fabric, chemical stability of the MnO 2 , and photothermal stability were demonstrated. The assembled multifunctional devices can be used both for environmental treatment and for clean water production.