Browsing by Author "Shetty Kodialbail, V."

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    Fabrication of CuxO/TiO2 hybrid nanocomposite by the synergetic effect of mixed phytoextract of agro-waste materials for enhanced visible-light-induced photocatalytic activity in degradation of ciprofloxacin
    (Elsevier Ltd, 2025) Shetty, P.; Shetty Kodialbail, V.
    The current study presents the environmentally friendly method for the synthesis of visible light active CuxO/TiO2 nanocomposite using the mixed plant extracts of areca nut exocarp (peel) and soapnut pericarp (shell) for photocatalytic degradation of ciprofloxacin, an antibiotic which is an emerging water contaminant. CuxO/TiO2 nanocomposite was synthesised by one pot method by simultaneous addition of precursors using the mixed aqueous extract. It consisted of CuO, Cu2O and TiO2 in all the crystalline phases with a band gap energy of 1.7 eV. The nanocomposite exhibited mixed morphology consisting of needle-like and particulate structures. The CuxO/ TiO2 nanocomposite facilitated 94 % degradation of 10 ppm ciprofloxacin within a span of 120 min under visible light irradiation. The CuxO/ TiO2 nanocomposite synthesized using the mixed extract exhibited superior photocatalytic activity than that synthesized solely with either areca nut peel extract or soap nut shell extract. The phyto-fabricated CuxO/ TiO2 nanocomposite showed better visible light-mediated photocatalytic activity than the phyto-fabricated CuxO, phyto- fabricated TiO2 and Degussa P-25. The kinetics of degradation followed pseudo-first order kinetic model with the rate constant of 0.0218 min?1. Thus, the phyto-fabricated CuxO/ TiO2 demonstrated a good potential as a photocatalyst to harness solar light in the treatment of wastewater contaminated with pollutants of emerging concern. © 2025 Elsevier B.V.