Journal
CHEMOSPHERE
Volume 271, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.129500
Keywords
Photocatalysis; Photothermal conversion; Bi2S3@Ag2S; Carbon fiber cloth; Self-floating film
Categories
Funding
- National Natural Science Foundation of China [21871078, 51672073]
- Natural Science Foundation of Heilongjiang Province [JQ2019B001, B2018010]
- Heilongjiang Postdoctoral Startup Fund [LBH-Q14135]
- Heilongjiang University Science Fund for Distinguished Young Scholars [JCL201802]
- Heilongjiang Provincial Institutions of Higher Learning Basic Research Funds Basic Research Projects [KJCX201909]
- Young Innovative Team Supporting Projects of Heilongjiang Province
- Heilongjiang Touyan Innovation Team Program
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The Bi2S3@Ag2S heterojunction supported on carbon fiber cloth can be self-floated on water surface, shows enhanced full spectrum absorption, and improves the photocatalytic-photothermal 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 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 (center dot O-2(-)) 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. (C) 2020 Elsevier Ltd. All rights reserved.
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