Abstract
In this work, strong visible-light photocatalysis and pyro-catalysis for dye decomposition was observed in hexagonal wurtzite phase ZnS:Cu. As described herein, ZnS:Cu ceramic is shown to be a visible-light-responsive material with a band gap of ~2.77 eV. Under visible-light irradiation, the photocatalytic decomposition ratios of ZnS:Cu on 5 mg/L Rhodamine B, methylene blue, and acid orange 7 solutions reach 99.2%, 95.9%, and 78.8%, respectively. With respect to pyro-catalysis results, the decomposition ratio for acid orange 7 in the same concentration is 82.2%. For photo-/pyro-bi-catalysis, the decomposition ratio can reach ~95%. In summary, the ZnS:Cu ceramics exhibit strong visible-light photocatalysis and pyro-catalysis, making it a viable solution for decomposing synthetic dyes wastewater through utilizing the visible-light energy and cold-hot cycling.
Original language | English |
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Pages (from-to) | 12096-12101 |
Number of pages | 6 |
Journal | Ceramics International |
Volume | 46 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1 Jun 2020 |
Externally published | Yes |
Keywords
- Pyro-catalysis
- Pyroelectric effect
- Visible-light photocatalysis
- ZnS:Cu
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry