Bi2S3@Ag2S nano-heterojunction decorated self-floating carbon fiber cloth and enhanced solar-driven photothermal-photocatalytic performance
The difficult recycle, secondary pollution and insufficient sunlight utilization of powder photocatalysts are main obstacles for practical applications. Bi2S3@Ag2S heterojunction supported on surface of carbon fiber cloth (CC) are fabricated through hydrothermal in-situ growth method combined with u...
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Veröffentlicht in: | Chemosphere (Oxford) 2021-05, Vol.271, p.129500, Article 129500 |
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Sprache: | eng |
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Zusammenfassung: | The difficult recycle, secondary pollution and insufficient sunlight utilization of powder photocatalysts are main obstacles for practical applications. Bi2S3@Ag2S heterojunction supported on surface of carbon fiber cloth (CC) are fabricated through hydrothermal in-situ growth method combined with ultrasonic loading strategy, which can be self-floated on water surface. Bi2S3@Ag2S nano-heterojunction with narrow band gap shows enhanced full spectrum absorption, which is in favor of improving the photocatalytic-photothermal performance. Self-floating CC as a substrate not only absorbs solar light converting to thermal energy, but also favors the recycle of catalysts. The resultant Bi2S3@Ag2S/CC composite films exhibit excellent photothermal conversion performance and photocatalytic degradation activity for tetracycline hydrochloride in low temperature wastewater under simulated sunlight. Experimental results confirm that the superoxide group (·O2−) is the main factor for the robust catalytic performance. The good photothermal-photocatalytic performance can be ascribed to the efficient absorption of sunlight for self-floating characteristics and high charge carriers separation efficiency of Bi2S3@Ag2S nano-heterojunction. This novel self-floating photothermal-photocatalytic film will have potential applications in fields of environment.
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•Bi2S3@Ag2S/carbon fiber cloth as self-floated photocatalyst is prepared.•Bi2S3@Ag2S carbon fiber cloth showed excellent photocatalytic degradation activity for low temperature wastewater.•It narrows the bandgap and extends the photoresponse to NIR region.•It exhibits synergistic enhanced photocatalytic-photothermal performance.•Bi2S3@Ag2S/carbon fiber cloth can be easily recycled and remains high stability. |
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ISSN: | 0045-6535 1879-1298 |
DOI: | 10.1016/j.chemosphere.2020.129500 |