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Revealing the charge transfer mechanism in Er ion-doped Bi4O5Br2/g-C3N5 nanocomposite for efficient photocatalytic degradation of antibiotic tetracycline

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2023, 33(7), pp.2277-2286
  • DOI : 10.1007/s42823-023-00549-5
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : March 22, 2023
  • Accepted : May 20, 2023
  • Published : December 1, 2023

Vadivel Sethumathavan 1 Gnanasekaran Lalitha 2 Balasubramanian N. 3

1Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, Tamil Nadu, 603202, India
2Departamento de Ingenieria Mecanica, Facultad de Ingenieria, Universidad de Tarapaca, Avda. General Velasquez, 1775, Arica, Chile
3Centre for Energy Storage Technologies Anna University, Chennai, Tamil Nadu, 600025, India

Accredited

ABSTRACT

Pharmaceutical products occurring in freshwater bodies create numerous problems for the water bodies owing to their bio-toxic nature. In order to remove such pharmaceutical pollutants, a novel Er-doped Bi4O5Br2/g-C3N5 nanocomposite was prepared by one-pot synthesis and applied for the photocatalytic removal process. The Er ions doped on the surface of Bi4O5Br2/g-C3N5 nanocomposite exhibited 97% degradation of tetracycline in 60 min under visible light irradiation, which is higher than pure g-C3N5 and Bi4O5Br2 photocatalysts. The improved photocatalytic properties are attributed to the outstanding visible light harvesting capacity and quick charge carrier separation efficiency which greatly reduced the recombination rate in the heterojunctions. Based on radical trapping experiments, the •O2−, h+ and •OH radicals played a prominent role in the photodegradation reactions under visible light. Finally, the ternary Er-doped Bi4O5Br2/g-C3N5 nanocomposite is effectively recyclable with quite a stable photocatalytic removal rate. This work enables a new perspective on the rational design of rare-earth-based nanocomposites for various pharmaceutical pollutants treatment processes.

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-26)

Total Citation Counts(KCI+WOS) (5) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (5) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-07-01)

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