Hydrogen Production and Degradation of Ciprofloxacin by Ag@TiO<sub>2</sub>-MoS<sub>2</sub> Photocatalysts
The photocatalytic activity of silver-based catalysts containing different amounts of molybdenum disulfide (MoS<sub>2</sub>; 5, 10 and 20 wt.%) was evaluated by the degradation of the antibiotic ciprofloxacin and the production of hydrogen via water splitting. All the silver (Ag)-based c...
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| Format: | Article |
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MDPI AG
2022-02-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/12/3/267 |
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| author | Abniel Machín Kenneth Fontánez Diego García Paola Sampayo Carla Colón-Cruz Gerardo J. Claudio-Serrano Loraine Soto-Vázquez Edgard Resto Florian I. Petrescu Carmen Morant Francisco Márquez |
| author_facet | Abniel Machín Kenneth Fontánez Diego García Paola Sampayo Carla Colón-Cruz Gerardo J. Claudio-Serrano Loraine Soto-Vázquez Edgard Resto Florian I. Petrescu Carmen Morant Francisco Márquez |
| author_sort | Abniel Machín |
| collection | DOAJ |
| description | The photocatalytic activity of silver-based catalysts containing different amounts of molybdenum disulfide (MoS<sub>2</sub>; 5, 10 and 20 wt.%) was evaluated by the degradation of the antibiotic ciprofloxacin and the production of hydrogen via water splitting. All the silver (Ag)-based catalysts degraded more than 70% of the antibiotic in 60 min. The catalyst that exhibited the best result was 5%Ag@TiO<sub>2</sub>-P25-5%MoS<sub>2</sub>, with ca. 91% of degradation. The control experiments and stability tests showed that photocatalysis was the degradation pathway and the selected silver-based catalysts were stable after seven cycles, with less than 2% loss of efficiency per cycle and less than 7% after seven cycles. The catalyst with the highest hydrogen production was 5%Ag@TiO<sub>2</sub> NWs-20%MoS<sub>2</sub>, 1792 μmol/hg, at a wavelength of 400 nm. This amount was ca. 32 times greater than that obtained by the pristine titanium oxide nanowires catalyst. The enhancement was attributed to the high surface area of the catalysts, along with the synergism created by the silver nanoparticles and MoS<sub>2</sub>. All the catalysts were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) surface area analysis and energy dispersive X-ray spectroscopy (EDS). |
| first_indexed | 2024-03-09T20:02:10Z |
| format | Article |
| id | doaj.art-af7fdf9943774b6cb3e66a15f258d4c0 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T20:02:10Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-af7fdf9943774b6cb3e66a15f258d4c02023-11-24T00:42:04ZengMDPI AGCatalysts2073-43442022-02-0112326710.3390/catal12030267Hydrogen Production and Degradation of Ciprofloxacin by Ag@TiO<sub>2</sub>-MoS<sub>2</sub> PhotocatalystsAbniel Machín0Kenneth Fontánez1Diego García2Paola Sampayo3Carla Colón-Cruz4Gerardo J. Claudio-Serrano5Loraine Soto-Vázquez6Edgard Resto7Florian I. Petrescu8Carmen Morant9Francisco Márquez10Arecibo Observatory, Cupey Campus, Universidad Ana G. Méndez, San Juan, PR 00926, USADepartment of Chemistry, Río Piedras Campus, University of Puerto Rico, San Juan, PR 00925, USANanomaterials Research Group, Division of Natural Sciences and Technology, Gurabo Campus, Universidad Ana G. Méndez, Gurabo, PR 00778, USANanomaterials Research Group, Division of Natural Sciences and Technology, Gurabo Campus, Universidad Ana G. Méndez, Gurabo, PR 00778, USANanomaterials Research Group, Division of Natural Sciences and Technology, Gurabo Campus, Universidad Ana G. Méndez, Gurabo, PR 00778, USANanomaterials Research Group, Division of Natural Sciences and Technology, Gurabo Campus, Universidad Ana G. Méndez, Gurabo, PR 00778, USAMaterials Characterization Center Inc., Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, USAMaterials Characterization Center Inc., Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, USAInternational Federation for the Promotion of Mechanism and Machine Science (IFToMM), Romanian Association for Theory of Machines and Mechanisms (ARoTMM), Bucharest Polytechnic University, 060042 Bucharest, RomaniaDepartment of Applied Physics, Instituto de Ciencias de Materiales Nicolás Cabrera, Autonomous University of Madrid, 28041 Madrid, SpainNanomaterials Research Group, Division of Natural Sciences and Technology, Gurabo Campus, Universidad Ana G. Méndez, Gurabo, PR 00778, USAThe photocatalytic activity of silver-based catalysts containing different amounts of molybdenum disulfide (MoS<sub>2</sub>; 5, 10 and 20 wt.%) was evaluated by the degradation of the antibiotic ciprofloxacin and the production of hydrogen via water splitting. All the silver (Ag)-based catalysts degraded more than 70% of the antibiotic in 60 min. The catalyst that exhibited the best result was 5%Ag@TiO<sub>2</sub>-P25-5%MoS<sub>2</sub>, with ca. 91% of degradation. The control experiments and stability tests showed that photocatalysis was the degradation pathway and the selected silver-based catalysts were stable after seven cycles, with less than 2% loss of efficiency per cycle and less than 7% after seven cycles. The catalyst with the highest hydrogen production was 5%Ag@TiO<sub>2</sub> NWs-20%MoS<sub>2</sub>, 1792 μmol/hg, at a wavelength of 400 nm. This amount was ca. 32 times greater than that obtained by the pristine titanium oxide nanowires catalyst. The enhancement was attributed to the high surface area of the catalysts, along with the synergism created by the silver nanoparticles and MoS<sub>2</sub>. All the catalysts were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy, field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) surface area analysis and energy dispersive X-ray spectroscopy (EDS).https://www.mdpi.com/2073-4344/12/3/267photocatalysisAg NPsMoS<sub>2</sub>ciprofloxacinhydrogen production |
| spellingShingle | Abniel Machín Kenneth Fontánez Diego García Paola Sampayo Carla Colón-Cruz Gerardo J. Claudio-Serrano Loraine Soto-Vázquez Edgard Resto Florian I. Petrescu Carmen Morant Francisco Márquez Hydrogen Production and Degradation of Ciprofloxacin by Ag@TiO<sub>2</sub>-MoS<sub>2</sub> Photocatalysts Catalysts photocatalysis Ag NPs MoS<sub>2</sub> ciprofloxacin hydrogen production |
| title | Hydrogen Production and Degradation of Ciprofloxacin by Ag@TiO<sub>2</sub>-MoS<sub>2</sub> Photocatalysts |
| title_full | Hydrogen Production and Degradation of Ciprofloxacin by Ag@TiO<sub>2</sub>-MoS<sub>2</sub> Photocatalysts |
| title_fullStr | Hydrogen Production and Degradation of Ciprofloxacin by Ag@TiO<sub>2</sub>-MoS<sub>2</sub> Photocatalysts |
| title_full_unstemmed | Hydrogen Production and Degradation of Ciprofloxacin by Ag@TiO<sub>2</sub>-MoS<sub>2</sub> Photocatalysts |
| title_short | Hydrogen Production and Degradation of Ciprofloxacin by Ag@TiO<sub>2</sub>-MoS<sub>2</sub> Photocatalysts |
| title_sort | hydrogen production and degradation of ciprofloxacin by ag tio sub 2 sub mos sub 2 sub photocatalysts |
| topic | photocatalysis Ag NPs MoS<sub>2</sub> ciprofloxacin hydrogen production |
| url | https://www.mdpi.com/2073-4344/12/3/267 |
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