Lamellar α-Zirconium Phosphate Nanoparticles Supported on N-Doped Graphene Nanosheets as Electrocatalysts for the Detection of Levofloxacin

Abstract

The excessive use of levofloxacin (LEV) can lead to significant environmental pollution, while also damaging human health. The accurate detection of its concentration is therefore essential to protect both the environment and human health. Herein, we report the simple synthesis of α-zirconium phosphate supported on nitrogen-doped graphene nanosheets (α-ZrP/NG) and its application in the voltammetric determination of trace LEV in real samples. The surface morphology, microstructure, and electrochemical properties of α-ZrP/NG were investigated by microscopic and spectroscopic techniques. The analytical parameters, including the accumulation potential, accumulation time, loading volume, and buffer pH, were optimized to improve the electrocatalytic sensing performance of α-ZrP/NG. Owing to the synergetic interaction between α-ZrP and NG, the proposed sensor exhibited an excellent electrocatalytic activity for the electrical oxidation of LEV. In the range of 0.01−5.0 μM, the anodic peak current of LEV increased linearly with an increase in the LEV concentration, and the limit of detection was 2.6 nmol L −1 . Finally, the LEV levels in wastewater, human serum, milk, and eye drop samples were determined by using the α-ZrP/NG system combined with a glassy carbon electrode to give satisfactory recoveries (98.48−103.2%), indicating that the prepared sensor demonstrates promise for use in environmental, food, and drug monitoring applications.

UiO-66/Carboxylated Multiwalled Carbon Nanotube Composites for Highly Efficient and Stable Voltammetric Sensors for Gatifloxacin

“…Although well validated, they often suffer from intrinsic drawbacks such as high cost, time-consuming, and cumbersome procedures. In contrast, electrochemical assays have demonstrated outstanding merits such as cost-effectiveness, short assay time, convenient operation, good sensitivity, and ease of miniaturization. − For these reasons, voltammetric sensors for detecting fluoroquinolone antibiotics are emerging. − However, a conventional glassy carbon electrode (GCE) often exhibits a slow electron transfer for GAT oxidation, resulting in low response current signals and poor sensitivity . Therefore, the development of efficient electrocatalysts is of great importance for the detection of GAT at a trace level.…”

Surface Modification Effect on V-Doped Ti3C2Tx as Bifunctional Catalyst Electrodes for Symmetric Supercapacitor and the Hydrogen Evolution Reaction

“…SCs are considered one of the most promising alternatives for energy storage devices as a result of their superior cycling stability, high power density, quick charge–discharge rate, and low overall cost. , The growing demand for renewable energy sources has sparked significant research interest in highly efficient energy conversion and storage technologies. The growing concern for environmental safety has led to an increased interest in SCs, which are known for their excellent potential as renewable energy storage devices. , As a result of their rapid charge–discharge properties, extremely high-power density, exceptional long-term performance, and cost-effective manufacturing, these devices have become increasingly popular. , …”

“…The growing concern for environmental safety has led to an increased interest in SCs, which are known for their excellent potential as renewable energy storage devices. 5,6 As a result of their rapid charge−discharge properties, extremely high-power density, exceptional long-term performance, and cost-effective manufacturing, these devices have become increasingly popular. 7,8 Currently, the combustion techniques used to create hydrogen fuels involve burning fossil fuels.…”

Development of novel microsphere structured – calcium tungstate as efficacious electrocatalyst for the detection of antibiotic drug nitrofurantoin

“…Multitudinous analytical techniques have been developed for the quantification of NFT, including high-performance liquid chromatography (HPLC), polarography, spectrophotometry, and colorimetry. 16–20 As these techniques have some drawbacks, 21 electrochemical sensors are considered to be good methods to assess pharmaceutical drugs with favorable characteristics, such as broad linear range, selectivity, rapid response, and trace-level determination. 22–26 Despite all these, the selectivity and sensitivity of bare electrodes are not up to the mark.…”