Jump to main content
Jump to site search


NGQD active sites as effective collectors of charge carriers for improving the photocatalytic performance of Z-scheme g-C3N4/Bi2WO6 heterojunctions

Author affiliations

Abstract

The broad absorption range and high carrier separation efficiency of photocatalysts are important for improving photocatalytic performance. Herein, nitrogen-doped graphene quantum dots (NGQDs) as effective active sites and collectors of charge carriers in modified Z-scheme g-C3N4/Bi2WO6 heterojunctions were obtained by a facile hydrothermal method, and dramatically enhanced the electron–hole separation efficiency and light harvesting ability. NGQD-modified Z-scheme g-C3N4/Bi2WO6 heterojunctions exhibited outstanding universal photocatalytic degradation activity for removing various antibiotics such as tetracycline (TC), ciprofloxacin (CIP), oxytetracyline (OTC), etc. under visible (vis) and near-infrared (NIR) light irradiation owing to the charge carriers' collection effect and up-conversion luminescence properties of NGQDs. In addition, the photocatalytic reaction mechanism was also revealed by active species trapping experiments and the electron spin resonance (ESR) technique, which indicated that the influencing order of active species on the photocatalytic reaction is ˙O2 > h+ ≫ ˙OH.

Graphical abstract: NGQD active sites as effective collectors of charge carriers for improving the photocatalytic performance of Z-scheme g-C3N4/Bi2WO6 heterojunctions

Back to tab navigation

Publication details

The article was received on 22 Aug 2017, accepted on 08 Dec 2017 and first published on 08 Dec 2017


Article type: Paper
DOI: 10.1039/C7CY01709J
Citation: Catal. Sci. Technol., 2018, Advance Article
  •   Request permissions

    NGQD active sites as effective collectors of charge carriers for improving the photocatalytic performance of Z-scheme g-C3N4/Bi2WO6 heterojunctions

    H. Che, C. Liu, W. Hu, H. Hu, J. Li, J. Dou, W. Shi, C. Li and H. Dong, Catal. Sci. Technol., 2018, Advance Article , DOI: 10.1039/C7CY01709J

Search articles by author

Spotlight

Advertisements