Soft-chemical synthesis and rational application of transition-metal tetrachalcogenide for LED-driven photocatalytic degradation of lomefloxacin in water

The current research focuses on the hydrothermal assembly of copper tungsten sulfide (Cu 2 WS 4 ) for photocatalytic degradation of lomefloxacin (LOM), a toxic and persistent antibiotic in water. The hydrothermal synthesis aided in tailoring the morphology of Cu 2 WS 4 . Transmission electron micros...

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Bibliographic Details
Published in:	Journal of materials science. Materials in electronics Vol. 33; no. 15; pp. 12359 - 12370
Main Authors:	Abhishek, Saligrama Mahesh, Swamy, Ningappa Kumara, Yashas, Shivamurthy Ravindra, Shivaraju, Harikaranahalli Puttaiah, Chamaraja, Nelligere Arkeswaraiah
Format:	Journal Article
Language:	English
Published:	New York Springer US 01-05-2022 Springer Nature B.V
Subjects:	Antibiotics Characterization and Evaluation of Materials Chemical synthesis Chemistry and Materials Science Decontamination Electromagnetic absorption Electron transfer Fourier transforms Hydroxyl radicals Infrared analysis Infrared spectroscopy Ions Light emitting diodes Mass spectrometry Materials Science Morphology Optical and Electronic Materials Oxidizing agents Photocatalysis Photodegradation Scavenging Transition metals Tungsten disulfide X ray analysis
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Summary:	The current research focuses on the hydrothermal assembly of copper tungsten sulfide (Cu 2 WS 4 ) for photocatalytic degradation of lomefloxacin (LOM), a toxic and persistent antibiotic in water. The hydrothermal synthesis aided in tailoring the morphology of Cu 2 WS 4 . Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Energy-dispersive X-ray analysis (EDX), UV–Vis spectroscopy, and Raman revealed the morphology, composition, crystallinity, and other properties of the material. Under light-emitting diode (LED) irradiation (20 W) for 120 min, 60% LOM degradation was catalyzed for a 20 mg catalyst dosage. In addition, Cu 2 WS 4 possessed good reusability and stability for three consecutive runs. Moreover, active radical scavenging experiments indicated that hydroxyl radicals (OH − ) were the primary oxidant responsible for LOM degradation. The electrospray ionization mass spectrometry (ESI-MS/MS) results indicated the catalytic disassociation of LOM during the typical photocatalytic examination. Cu 2 WS 4 showed maximum efficiency for LOM degradation owing to the quick electron transfer, effective visible-light absorption, and slower electrons–hydroxyl pair recombination Thus, the as-synthesized Cu 2 WS 4 used for photocatalysis promotes a fit-for-purpose and dependable system for decontaminating LOM in environmental samples.
ISSN:	0957-4522 1573-482X
DOI:	10.1007/s10854-022-08193-x