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Highly efficient detection of ofloxacin in water by samarium oxide and β-cyclodextrin-modified laser-induced graphene electrode.

Authors :
Liu, Zeyu
Wang, Qun
Xue, Qiang
Chang, Chunwen
Wang, Rong
Liu, Yao
Xie, Haijiao
Source :
Microchemical Journal. Mar2023, Vol. 186, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

OFL detection based on β-CD/Sm 2 O 3 NPs/LIG electrochemical sensor. [Display omitted] • Sm 2 O 3 nanoparticles and β-CD were firstly used to modified graphene electrode. • The synergistic effect of two modification compositions promoted OFL detection. • DFT calculation confirmed the enhanced adsorption energy and electron transfer. • The developed sensor obtained a very low detection limit of 0.005 μM for OFL. We developed a new electrochemical sensor that detects ofloxacin (OFL) in water by depositing β-cyclodextrin (β-CD) and samarium oxide nanoparticles (Sm 2 O 3 NPs) onto a laser-induced graphene (LIG) electrode. Scanning electron microscopy, Transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, contact angle measurements, and electrochemical impedance spectroscopy were used to characterize β-CD/Sm 2 O 3 NPs/LIG electrodes. Our results showed that the improved electrochemical activity is due to the excellent electrocatalytic performance of Sm 2 O 3 NPs, improving electron transfer efficiency. The deposition of β-CD improves electrode hydrophilicity and increases the adsorption capacity of OFL on the electrode surface. The synergistic effect of two modification compositions can promote OFL detection. The enhanced adsorption energy and improved electron transfer characteristics were also confirmed by density functional theory calculations. Under optimal detection conditions, the sensor achieves a wide linear range (0.01 ∼ 1.0 μmol/L and 1.0 ∼ 120 μmol/L) and a low detection limit (0.005 μmol/L) with good anti-interference ability and stability. This sensor has also been successfully applied to the detection of OFL in tap water and lake water. These results show that the developed sensor is a promising step towards rapid in situ detection of OFL in water environments. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0026265X
Volume :
186
Database :
Academic Search Index
Journal :
Microchemical Journal
Publication Type :
Academic Journal
Accession number :
161280566
Full Text :
https://doi.org/10.1016/j.microc.2022.108353