Interaction of levofloxacin with reverse micelle sol-gel synthesized TiO2 nanoparticles: Revealing ligand-to-metal charge transfer (LMCT) mechanism enhances photodegradation of antibiotics under visible light

Autor:	Vimal G. Gandhi, Atindra D. Shukla, Manish Mishra, Van-Huy Nguyen, Rajesh J. Tayade, Kiran S. Varma
Rok vydání:	2022
Předmět:	Materials science Aqueous solution Ligand Mechanical Engineering Condensed Matter Physics Photochemistry Micelle chemistry.chemical_compound Adsorption chemistry Mechanics of Materials Photocatalysis General Materials Science Carboxylate Photodegradation Visible spectrum
Zdroj:	Materials Letters. 309:131304
ISSN:	0167-577X
DOI:	10.1016/j.matlet.2021.131304
Popis:	Synthesis of TiO2 through reverse micelle sol-gel (RMS) route shown 18 nm mean diameter with homogeneous particle size distribution (PDI = 0.11). TiO2 nanomaterial with a bandgap of 3.15 eV exhibited degradation efficiency of 83% towards levofloxacin (LFX) aqueous pollutant of 50 mg/L under 6 H of the visible LED light. Visible light photoactivity ascribed to ligand to metal charge transfer (LMCT) process between the targeted antibiotic pollutant and titania photocatalyst. At neutral pH, photocatalytic degradation performance of TiO2 was observed higher due to adsorption of LFX through N of piperazinyl ring causing LMCT. The basic pH encouraged adsorption of LFX through the carboxylate group, which showed comparatively lesser activity. In acidic pH conditions, the lowest photoactivity resulted from the synergetic effect of lower adsorption and participation of the ketone-carboxyl adsorption site of LFX with TiO2.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f35b40e546382fb760516f6984033013 https://doi.org/10.1016/j.matlet.2021.131304 Zobrazit plný text záznamu Full Text from ScienceDirect