Laís Muniz Meireles, Rafael Matias Silva, Renê Chagas da Silva, Leonardo Luiz Okumura, Renata Pereira Lopes Moreira, Tiago Almeida Silva
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引用次数: 0
Abstract
An unprecedented electrochemical sensor based on low-cost films combining carbon black (CB) and green-synthesized silver nanoparticles (AgNPs) is proposed for the voltammetric determination of ciprofloxacin, an antibiotic widely used in the treatment of infectious diseases. AgNPs were biosynthesized by using an aqueous plant extract of Camellia sinensis (black tea) in which the metabolites worked as reducing and stabilizing agents. The AgNPs and CB nanoparticles were incorporated within a crosslinked chitosan (Ch) film over the surface of a glassy carbon electrode (GCE). The nanomaterials were characterized by scanning electron microscopy (SEM), ultraviolet–visible molecular absorption spectrophotometry (UV–Vis), dynamic light scattering (DLS), zeta potential, and cyclic voltammetry (CV). The sensor modified with both nanomaterials (AgNPs-CB-Ch/GCE) showed a significatively enhanced analytical signal for the ciprofloxacin irreversible oxidation peak. Using square-wave voltammetry (SWV) under the optimized working conditions and the proposed AgNPs-CB-Ch/GCE sensor, the analytical curve displayed two linear concentration ranges of 3.1 to 24.8 µmol L−1 and of 36.9 to 130.3 µmol L−1, with a limit of detection of 0.48 µmol L−1. The proposed electrochemical sensor presented good precision as shown from repeatability tests, as well as it was successfully applied in the quantification of ciprofloxacin in the synthetic urine sample, with recovery results close to 100% for both linear concentration ranges. The presented AgNPs synthetic method and CIP electrochemical detection are found to be simple and efficient compared to the conventional methods commonly reported.
期刊介绍:
The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry.
The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces.
The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis.
The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.