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https://hdl.handle.net/11499/9256
Title: | A highly efficient nanomaterial with molecular imprinting polymer: Carbon nitride nanotubes decorated with graphene quantum dots for sensitive electrochemical determination of chlorpyrifos | Authors: | Yola, M.L. Atar, Necip |
Keywords: | Carbon nitride Chemical detection Cyclic voltammetry Electrochemical impedance spectroscopy Electrodes Electropolymerization Enzyme activity Glass membrane electrodes Graphene Nanocrystals Nanostructured materials Nanotubes Nitrides Scanning electron microscopy Semiconductor quantum dots Transmission electron microscopy Voltammetry Yarn Acetylcholinesterase enzymes Carbon nitride nanotubes Electrochemical determination Hydrothermal treatments Modified glassy carbon electrode Molecular imprinting polymer Organophosphate insecticides Phosphate buffer solutions X ray photoelectron spectroscopy |
Publisher: | Electrochemical Society Inc. | Abstract: | Chlorpyrifos (CHL) is organophosphate insecticide and has low water solubility (1.39 mg/L). CHL is known to produce toxic effects by inhibiting the acetylcholinesterase enzyme activity. Because of this, the important health problems occur worldwide. Hence, it is important to detect the concentration of CHL at the sensitive levels in environmental waters. In this study, a novel molecular imprinted voltammetric sensor based on carbon nitride nanotubes (C3N4 NTs) decorated with graphene quantum dots (GQDs) modified glassy carbon electrode (GCE) was developed for determination of CHL. The unique C3N4 NTs@GQDs nanohybrid was synthesized by hydrothermal treatment. CHL imprinted GCE based on C3N4 NTs@GQDs nanohybrid was prepared via electropolymerization process of 100 mM pyrrole as monomer in the presence of phosphate buffer solution (PBS) (pH 7.0) containing 25 mM CHL. The prepared nanomaterials were characterized using scanning electron microscope (SEM), transmission electron microscope (TEM), raman spectroscopy, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). The linearity range and the detection limit of the method were calculated as 1.0 × 10-11-1.0 × 10-9 M and 2.0 × 10-12 M, respectively. The sensor was applied to wastewater samples with good selectivity and recovery. The stability and selectivity of the voltammetric sensor were also reported. © 2017 The Electrochemical Society. | URI: | https://hdl.handle.net/11499/9256 https://doi.org/10.1149/2.1411706jes |
ISSN: | 0013-4651 |
Appears in Collections: | Mühendislik Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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