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Preparation of Bi2S3/carbon quantum dots hybrid materials for enhanced photocatalytic properties under ultraviolet–, visible– and near infrared–irradiations

Abstract

To solve the growing pollution issues, it is a promising alternative to develop efficient sunlight–driven photocatalysts for purifying organic wastewater. Herein, we report a new and efficient full–spectrum–responsive photocatalyst composed of Bi2S3 nanotubes incorporated with carbon quantum dots (C–dots) for rapid degrading methylene blue (MB) and tetracycline hydrochloride (TC). Compared with the naked Bi2S3 nanotubes, the as–prepared Bi2S3/C–dots nanohybrids show a remarkably higher photocatalytic efficiency for degrading MB or TC under ultraviolet (UV–), visible (vis–) and near–infrared (NIR–) light irradiations within 5 minutes. A possible mechanism is proposed for the enhanced photocatalytic activity of the Bi2S3/C–dots nanohybrids. A lower band gap as well as a wider absorbance in UV–, vis– and NIR–region can increase light harvesting ability of the Bi2S3/C–dots. Meanwhile, the existence of C–dots can facilitate the charge separation of the photo–generated electron/hole pairs while electrons transfer from Bi2S3 to C–dots. Besides, an increased surface area of the Bi2S3/C–dots nanohybrids also contribute to the excellent photocatalytic activity.

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Publication details

The article was received on 25 Jun 2017, accepted on 13 Sep 2017 and first published on 14 Sep 2017


Article type: Paper
DOI: 10.1039/C7NR04593J
Citation: Nanoscale, 2017, Accepted Manuscript
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    Preparation of Bi2S3/carbon quantum dots hybrid materials for enhanced photocatalytic properties under ultraviolet–, visible– and near infrared–irradiations

    J. Wang, X. Zhang, J. WU, H. Chen, S. Sun, J. Bao, S. Li and H. Bi, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR04593J

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