Journal
NEW JOURNAL OF CHEMISTRY
Volume 44, Issue 25, Pages 10250-10257Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj01360a
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Funding
- Ministry of Science and Technology [Project-MOST-108-2221-E-027-063]
- National Taipei University of Technology (NTUT)
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In this study, we developed a Ni2O3@f-CNF/rGO composite for the sensitive and selective electrochemical detection of Klonopin (KNP)viaa simple ultrasonic method. Scanning electron microscope (SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRD), and Raman spectroscopy results demonstrated the successful formation of the Ni2O3@f-CNF/rGO composite. The electrochemical impedance spectroscopy (EIS) analysis of the Ni2O3@f-CNF/rGO-modified screen-printed carbon electrode (Ni2O3@f-CNF/rGO/SPCE) revealed a minimized charge transfer resistance (R-ct) than those for Ni2O3, f-CNF/rGO, and bare SPCE. In the electrochemical experiments, Ni2O3@f-CNF/rGO-modified SPCE exhibits superior performance towards the electrochemical detection of KNP, which provides an ultra-low detection limit of 2.8 nM in a wide concentration range of 0.08-1070.94 mu M with a sensitivity of 12.02 mu A mu M(-1)cm(2)using the amperometrici-tmethod. Moreover, the practical feasibility of Ni2O3@f-CNF/rGO was assessed for the electrochemical determination of KNP in the human blood serum and urine samples and the result indicated appreciable recovery of KNP.
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