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Article

Hydrogen Production and Degradation of Ciprofloxacin by [email protected]2-MoS2 Photocatalysts

1
Arecibo Observatory, Cupey Campus, Universidad Ana G. Méndez, San Juan, PR 00926, USA
2
Department of Chemistry, Río Piedras Campus, University of Puerto Rico, San Juan, PR 00925, USA
3
Nanomaterials Research Group, Division of Natural Sciences and Technology, Gurabo Campus, Universidad Ana G. Méndez, Gurabo, PR 00778, USA
4
Materials Characterization Center Inc., Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, USA
5
International Federation for the Promotion of Mechanism and Machine Science (IFToMM), Romanian Association for Theory of Machines and Mechanisms (ARoTMM), Bucharest Polytechnic University, 060042 Bucharest, Romania
6
Department of Applied Physics, Instituto de Ciencias de Materiales Nicolás Cabrera, Autonomous University of Madrid, 28041 Madrid, Spain
*
Authors to whom correspondence should be addressed.
Academic Editor: Sónia Carabineiro
Catalysts 2022, 12(3), 267; https://doi.org/10.3390/catal12030267
Received: 31 December 2021 / Revised: 19 February 2022 / Accepted: 25 February 2022 / Published: 27 February 2022
(This article belongs to the Special Issue Gold, Silver and Copper Catalysis)
The photocatalytic activity of silver-based catalysts containing different amounts of molybdenum disulfide (MoS2; 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%[email protected]2-P25-5%MoS2, 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%[email protected]2 NWs-20%MoS2, 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 MoS2. 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). View Full-Text
Keywords: photocatalysis; Ag NPs; MoS2; ciprofloxacin; hydrogen production photocatalysis; Ag NPs; MoS2; ciprofloxacin; hydrogen production
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MDPI and ACS Style

Machín, A.; Fontánez, K.; García, D.; Sampayo, P.; Colón-Cruz, C.; Claudio-Serrano, G.J.; Soto-Vázquez, L.; Resto, E.; Petrescu, F.I.; Morant, C.; Márquez, F. Hydrogen Production and Degradation of Ciprofloxacin by [email protected]2-MoS2 Photocatalysts. Catalysts 2022, 12, 267. https://doi.org/10.3390/catal12030267

AMA Style

Machín A, Fontánez K, García D, Sampayo P, Colón-Cruz C, Claudio-Serrano GJ, Soto-Vázquez L, Resto E, Petrescu FI, Morant C, Márquez F. Hydrogen Production and Degradation of Ciprofloxacin by [email protected]2-MoS2 Photocatalysts. Catalysts. 2022; 12(3):267. https://doi.org/10.3390/catal12030267

Chicago/Turabian Style

Machín, Abniel, Kenneth Fontánez, Diego García, Paola Sampayo, Carla Colón-Cruz, Gerardo J. Claudio-Serrano, Loraine Soto-Vázquez, Edgard Resto, Florian I. Petrescu, Carmen Morant, and Francisco Márquez. 2022. "Hydrogen Production and Degradation of Ciprofloxacin by [email protected]2-MoS2 Photocatalysts" Catalysts 12, no. 3: 267. https://doi.org/10.3390/catal12030267

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