In-Situ polymerized polypyrrole Janus cotton fabric for Solar-driven water evaporation in Textile-dying wastewater.

• The JCF is designed through a one-side deposition followed by in-situ polymerization. • JCF-60 possessed a good vapor generation rate and photothermal conversion efficiency. • JCF shows great potential in solar-driven water evaporation applications. Herein, a Janus cotton fabric (JCF) with polypyrrole (PPy) layer was prepared through one-side ultrasonic atomization deposition followed by the in-situ polymerization. The PPy layer was robust on the fabric and showed excellent light absorbance ability (∼99%). And the JCF with 60 min one-side deposition (JCF-60) showed good photothermal conversion ability with the vapor generation rate of 1.45 kg m−2h−1 and the photothermal conversion efficiency of 91.0% in dyed water purification. It can be expected to large scale applications in solar-driven water evaporation. [ABSTRACT FROM AUTHOR]