Ag/AgCl/Ag2MoO4 composites for visible-light-driven photocatalysis
| Autor: | Zhendong Liu, Junlei Zhang, Zhongyi Jiao, Zhen Ma |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Precipitation (chemistry)
General Chemical Engineering General Physics and Astronomy 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Rhodamine B Methyl orange Photocatalysis Irradiation Composite material 0210 nano-technology Methylene blue Visible spectrum |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 371:67-75 |
| ISSN: | 1010-6030 |
| DOI: | 10.1016/j.jphotochem.2018.11.003 |
| Popis: | Ag2MoO4 shows low photocatalytic activity under visible light. It would be interesting to develop Ag2MoO4-based composite/heterojunction photocatalysts working efficiently under visible light. Herein, novel Ag/AgCl/Ag2MoO4 composites were obtained via photoreduction of AgCl/Ag2MoO4 composites prepared by sequential precipitation. The composition, morphologies, and optical properties of the samples were studied via various characterization techniques. Photocatalytic degradation of rhodamine B (RhB), methylene blue (MB), methyl orange (MO), norfloxacin (NOF), and tetracycline hydrochloride (TC) solutions was conducted under visible-light irradiation. An optimal Ag/AgCl/Ag2MoO4 catalyst showed much higher photocatalytic activity than Ag2MoO4, and it also showed reasonably fine recyclability. Through radical-capturing experiments, photogenerated holes (h+) were determined to be the main active species whereas hydroxyl radicals ( OH) were found to play a secondary role in photocatalysis. Possible photocatalytic mechanisms were proposed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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