化学
复合数
铜
石墨烯
电化学
左氧氟沙星
纳米技术
电极
复合材料
有机化学
物理化学
生物化学
材料科学
抗生素
作者
Yu Tian,Palanisamy Rupa Kasturi,Carmel B. Breslin
出处
期刊:Talanta
[Elsevier]
日期:2024-08-01
卷期号:275: 126132-126132
标识
DOI:10.1016/j.talanta.2024.126132
摘要
Given the levels of pollution in the aquatic environment and the development of antimicrobial resistance, it is essential to develop sensors, with sensitivity, selectivity, stability, and cost-effectiveness, for the determination of antibiotics. The present article highlights the fabrication of an ultra-sensitive graphene and copper sensor, Gr/Cu, supported on glassy carbon (GCE/Gr/Cu) for the electroanalysis of levofloxacin through a cost-effective electrodeposition method. The sequential electrodeposition of graphene and Cu was optimised to give GCE/Gr/Cu, with the Cu particles well dispersed on the graphene sheets. The composite exhibited very good conducting properties as evidenced from electrochemical impedance studies. Using cyclic voltammetry, an impressive sensitivity of 19.7 μA μM-1 cm-2 was achieved with a detection limit of 11.86 nM, providing a promising electrocatalytic material for the determination of this antibiotic. Moreover, good selectivity was observed in the presence of various ions typically found in water and other drug molecules, while very good stability exceeding a 21-day period was achieved, and recovery values between 97.7 and 103.8 % were obtained in tap water.
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