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E‐Waste Based V 2 O 5 /RGO/Pt Nanocomposite for Photocatalytic Degradation of Oxytetracycline
Author(s) -
Mohan Harshavardhan,
Selvaraj Dhanakumar,
Kuppusamy Shanthi,
Venkatachalam Janaki,
Park YoolJin,
Seralathan KamalaKannan,
Oh ByungTaek
Publication year - 2018
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13123
Subject(s) - nanocomposite , photocatalysis , nuclear chemistry , materials science , graphene , fourier transform infrared spectroscopy , aqueous solution , photodegradation , oxide , adsorption , oxytetracycline , chemical engineering , chemistry , nanotechnology , catalysis , organic chemistry , metallurgy , antibiotics , biochemistry , engineering
The increasing prevalence of antibiotics in the environment has promoted the development of antibiotic resistant microorganisms, and novel approaches are needed to effectively remove antibiotics from water and mitigate this worldwide problem. A reduced graphene oxide‐V 2 O 5 (RGOV) nanocomposite was synthesized and used for photocatalytic degradation of the antibiotic oxytetracycline (OTC) in aqueous solution. The Sol–Gel method was employed for V 2 O 5 synthesis from e‐waste‐based vanadium nitrate, and a one pot solvothermal method was used to synthesize RGOV. Fourier‐transform infrared spectroscopy (FTIR), X‐ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM) with energy dispersive analysis of X‐rays (EDAX) confirmed V‐O‐C bonds on the surface of the RGOV nanocomposites. A decrease in the band gap of V 2 O 5 from 2.21 to 2.13 eV was supported by diffuse reflectance ultraviolet–visible spectrophotometry. OTC adsorption onto the nanocomposite increased with an increase in RGO concentration and saturated at 17% for RGOV with 30% graphene oxide. The composite degraded 90% of the OTC present in aqueous solution (50 mg/L). Platinum (1%) doping further increased OTC degradation by the nanocomposite to 98.7%. Optimum conditions for maximum OTC degradation are (1) an initial OTC concentration of 50 mg/L, (2) a RGOV nanocomposite dose of 0.5 g/L, and (3) a 40 min incubation time. Our results support the potential use of RGOV nanocomposite for OTC photodegradation. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13123, 2019