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Journal article
Enhanced Visible-Light-Assisted Photocatalytic Removal of Tetracycline Using Co/La@g-C3N4 Ternary Nanocomposite and Underlying Reaction Mechanisms
Water, Vol.16(18), 2563
2024
Abstract
Graphitic carbon nitride (g-C 3 N 4) is a promising material for photocatalytic applications. However, it suffers from poor visible-light absorption and a high recombination rate of photogener-ated electron–hole pairs. Here, Co/La@g-C 3 N 4 with enhanced photocatalytic activity was prepared by co-doping Co and La into g-C 3 N 4 via a facile one-pot synthesis. Co/La@g-C 3 N 4 displayed better performance, achieving 94% tetracycline (TC) removal within 40 min, as compared with g-C 3 N 4 (BCN, 65%). It also demonstrated promising performance in degrading other pollutants, which was ~2–4-fold greater relative to BCN. The improved photocatalytic activity of Co/La@g-C 3 N 4 was associated with improved photogenerated charge separation, reduced charge transfer resistance, a built-in electric field arising from the p-n-p heterojunction, and the synergistic effect of ternary components for the separation and transfer of the photogenerated charge carriers. Superoxide radicals are suggested to be the most notable reactive species responsible for the photocatalytic reaction. Environmental factors, including the pollutant concentration, catalyst dosage, solution pH, inorganic salts, water matrices, and mixture with dyes, were considered in the photocatalytic reactions. Co/La@g-C 3 N 4 showed good reusability for five cycles of the photocatalytic degradation of TC. The facile one-pot co-doping of Co and La in g-C 3 N 4 formed a p-n-p heterojunction with boosted photocatalytic activity for the highly efficient removal of TC from various water matrices.
Details
- Title
- Enhanced Visible-Light-Assisted Photocatalytic Removal of Tetracycline Using Co/La@g-C3N4 Ternary Nanocomposite and Underlying Reaction Mechanisms
- Authors/Creators
- Kingsley I. John (Author) - Murdoch UniversityTouma B Issa (Author)Goen Ho (Author)Aleks Nikoloski (Author) - Murdoch University, Centre for Water, Energy and WasteDan Li (Author) - Murdoch University, Centre for Water, Energy and Waste
- Publication Details
- Water, Vol.16(18), 2563
- Publisher
- MDPI
- Identifiers
- 991005701670207891
- Copyright
- © 2024 by the authors.
- Murdoch Affiliation
- Murdoch University; Centre for Water, Energy and Waste
- Language
- English
- Resource Type
- Journal article
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