期刊
ULTRASONICS SONOCHEMISTRY
卷 68, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ultsonch.2020.105176
关键词
Graphene oxide; NiMnO; Sonochemical synthesis; Metronidazole; Electrochemical sensor
资金
- Ministry of Science and Technology, Taiwan [MOST108-2221-E-182-030, MOST 107-2113-M-027-005-MY3]
In the present work, we report on the synthesis of crump-like nickel manganous oxide nanoparticles decorated partially reduced graphene oxide (NiMnO@pr-GO) nanocomposite through high-intensity ultrasonic bath sonication (ultrasonic frequency = 37 kHz and power = 150 W). The NiMnO@pr-GO nanocomposite modified glassy carbon electrode (GCE) was then employed for the electrochemical reduction of detrimental metronidazole (MNZ). The crystalline phase and formation of the NiMnO@pr-GO nanocomposites were confirmed by X-ray diffraction and other spectroscopic techniques. The cyclic voltammetry results demonstrate that this NiMnO@pr-GO nanocomposite modified GCE has a lower reduction potential and higher catalytic activity towards MNZ than do NiMnO and GO modified GCEs. Under optimized conditions, the fabricated NiMnO@pr-GO electrode can detect metronidazole over a wide linear range with a lower limit of detection of 90 nM. The sensitivity of the sensor was 1.22 mu A mu M-l cm(-2) and was found to have excellent selectivity and durability for the detection of MNZ.
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