Superhydrophilic and oleophobic porous architectures based on basalt fibers as novel oil-repellent photothermal materials for efficient solar steam generation.

07:00 EST 3rd December 2019 | BioPortfolio

Summary of "Superhydrophilic and oleophobic porous architectures based on basalt fibers as novel oil-repellent photothermal materials for efficient solar steam generation."

The construction of efficient solar steam generation systems is of great importance for a broad varieties of applications such as desalination, sterilization etc. Herein, we report for the first time the preparation of superhydrophilic and oleophobic porous architectures based on basalt fibers, which was prepared by carbonization of the mixture of basalt fibers and tissue paper (BFT) followed by an oleophobic modification (O-BFT), as novel oil-repellent photothermal materials for efficient solar steam generation. The as-prepared O-BFT shows abundant porous features, superior light absorption and better thermal insulation (thermal conductivity 0.371Wm -1 K -1 ). Correspondingly, a high solar energy conversion efficiency of 90% was achieved at 1 sun irradiation. Its strong oleophobic wettability endows it excellent oil-repellent ability. Therefore, a high energy conversion efficiency of 81% in oily water was obtained at 1 sun irradiation, while the BFT only shows a low energy conversion efficiency of 26% because of severe oil contamination which seriously blocks the water evaporation. These unique features of the O-BFT makes it possible for efficient solar steam generation even for oily wastewater, showing great advantages over those reported photothermal materials usually suffering the drawbacks of poor anti-fouling performance, which in turn is of greatly technological insignificance for practical solar steam generation by largely extends its applications range.


Journal Details

This article was published in the following journal.

Name: ChemSusChem
ISSN: 1864-564X


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