A Gelation-Stabilized Strategy toward Photothermal Architecture Design for Highly Efficient Solar Water Evaporation

摘要

Constructing a solar-driven interfacial evaporation system with effective energyconfinement and conversion abilities is highly desired for seawater desalinationand wastewater purification without the need of a complex and costly infrastructure.Herein, a powerful universal approach for the bottom-up design of thephotothermal conversion system using 0D nanoparticles is reported. That is, theintegration of nanoparticles with cotton fibers (CFs) is first formed by surfaceadsorption and then reinforced by in situ cross-linked polyvinyl alcohol chains.The developed photothermal architecture exhibits a superior water evaporationperformance, excellent durability, and high adaptability in various environments.By this approach, the resulting system of carbon dots assembled on the surface ofCFs is able to evaporate water with a rate of 2.32 kgm~(-2) h~(-1) and a solar-to-vaporefficiency of 93.6% under 1 sun irradiation, remarkably superior to the evaporatorsmade by other black photothermal sheets. Thereby, the presented methodenables potentially low-cost, abundant, and tunable 0D nanomaterials forrationally designing ideal solar conversion structures.