Photo-Fenton Degradation of Ciprofloxacin by Novel Graphene Quantum Dots/α-FeOOH Nanocomposites for the Production of Safe Drinking Water from Surface Water
2022
Md. Nahid Pervez | Shengjia Ma | Siqi Huang | Vincenzo Naddeo | Yaping Zhao
In the current work, novel graphene quantum dots (GQDs)-doped goethite (&alpha:-FeOOH) nanocomposites (GQDs/&alpha:-FeOOH) were prepared by following a feasible hydrolysis method and applied for ciprofloxacin (CIP) removal. Results showed that the CIP degradation efficiency was significant (93.73%, 0.0566 min&minus:1) in the GQDs/&alpha:-FeOOH + H2O2 + Vis system using much lower amounts of H2O2 (0.50 mM), which is 3.9 times the &alpha:-FeOOH + H2O2 + Vis system. It was found that &bull:OH, O2&bull:&minus:, and 1O2 were mainly responsible for CIP degradation in the GQDs/&alpha:-FeOOH photo-Fenton system. GQDs/&alpha:-FeOOH demonstrated broad-spectrum UV&ndash:vis-IR responsiveness in the degradation of ciprofloxacin as a function of the doping of GQDs. Additionally, GQDs/&alpha:-FeOOH showed outstanding durability (recyclability up to 3 cycles with a lower iron leaking amount, 0.020 mg L&minus:1), a broad range of application pH, and a pretty acceptable catalytic efficacy in a variety of surface water matrices. Overall, GQDs/&alpha:-FeOOH have been shown to be an effective photocatalyst for the remediation of emerging contaminants via the workable exploitation of solar energy.
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