Ma L, Yang L, Li L, Zhang W, Cheng Y, Wang L, Zhou X, Lv Y, Liu M. Photodegradation of fleroxacin by g-C
3N
4/PPy/Ag and HPLC-MS/MS analysis of degradation pathways.
RSC Adv 2023;
13:11912-11918. [PMID:
37077267 PMCID:
PMC10107023 DOI:
10.1039/d3ra01485a]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/05/2023] [Indexed: 04/21/2023] Open
Abstract
To improve the photocatalytic activity of g-C3N4, graphitic phase carbon nitride was prepared using melamine as the substrate and modified with PPy and Ag nanoparticles. The structure, morphology, and optical properties of the photocatalysts were investigated using various characterization methods such as XRD, FT-IR, TEM, XPS, and UV-vis DRS. The degradation of fleroxacin, a common quinolone antibiotic, was isolated and measured using the HPLC-MS/MS technique to trace its intermediates and deduce the main degradation pathways. The results showed that g-C3N4/PPy/Ag had high photocatalytic activity and a degradation rate of more than 90%. The fleroxacin degradation reactions were primarily oxidative ring opening of the N-methyl piperazine ring structure, defluorination reactions on fluoroethyl, HCHO, and N-methyl ethylamine removal reactions.
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