Preparation of Bi2S3/Carbon Quantum Dots Hybrid Materials for Enhanced Photocatalytic Properties Under Ultraviolet–, Visible–and Near Infrared–Irradiations

Authors

• Jingmin Wang, Anhui University
• Xiang Zhang, Anhui University
• Ji Wu, Georgia Southern UniversityFollow
• Hao Chen, Georgia Southern UniversityFollow
• Song Sun, University of Science and Technology of China
• Jun Bao, University of Science and Technology of China
• Shikuo Li, Anhui University
• Hong Bi, Anhui UniversityFollow

Document Type

Article

Publication Date

9-14-2017

Publication Title

Nanoscale

DOI

10.1039/C7NR04593J

ISSN

2040-3372

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 rapidly degrading methylene blue (MB) and tetracycline hydrochloride (TC). Compared with naked Bi2S3 nanotubes, the as-prepared Bi2S3/C-dot nanohybrids show a remarkably higher photocatalytic efficiency for degrading MB or TC under ultraviolet (UV-), visible (vis-) and near-infrared (NIR-) light irradiation within 5 minutes. A possible mechanism is proposed for the enhanced photocatalytic activity of the Bi2S3/C-dot nanohybrids. A lower band gap as well as a wider absorbance in the UV-, vis- and NIR-regions can increase the 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-dot nanohybrids also contributes to the excellent photocatalytic activity.

Recommended Citation

Wang, Jingmin, Xiang Zhang, Ji Wu, Hao Chen, Song Sun, Jun Bao, Shikuo Li, Hong Bi. 2017. "Preparation of Bi2S3/Carbon Quantum Dots Hybrid Materials for Enhanced Photocatalytic Properties Under Ultraviolet–, Visible–and Near Infrared–Irradiations." Nanoscale, 9 (41): 15873-15882. doi: 10.1039/C7NR04593J source: https://pubs.rsc.org/en/content/articlelanding/2017/NR/C7NR04593J#!divAbstract
https://digitalcommons.georgiasouthern.edu/chem-facpubs/98

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