One‑shot synthesis of a nickel oxide/carbon composite electrocatalyst for a sensor capable of electrochemically detecting the antibiotic chloramphenicol in real samples
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon letters / 33권 / 3호
ㆍ저자명 : Jallal Zoubir, Chaimae Radaa, Idriss Bakas, Malika Tamimi, Samir Qourzal, Ali Assabbane
ㆍ저자명 : Jallal Zoubir, Chaimae Radaa, Idriss Bakas, Malika Tamimi, Samir Qourzal, Ali Assabbane
목차
One-shot synthesis of a nickel oxidecarbon composite electrocatalyst for a sensor capable of electrochemically detecting the antibiotic chloramphenicol in real samplesAbstract
1 Introdution
2 Experimental
2.1 Apparatus
2.2 Reagent and solution
2.3 Preparation of the NiO & CPE
2.4 Analytical procedure
3 Results and discussion
3.1 Optimization of the %NiO & CG
3.2 Optimization of calcinations temperature
3.3 Characterization of Ni & CPE
3.3.1 SEM and EDX for NiO-CPE modified and CPE unmodified
3.3.2 X-ray diffraction of NiO-CPE modified and CPE unmodified
3.4 Electrochemical behaviors of chloramphenicol at NiO-CPE
3.4.1 Electrocatalytic reduction of chloramphenicol at NiO-CPE and CPE unmodified
3.4.2 Comparison between NiO-CPE fabrique and CPE using cyclic voltammetry
3.4.3 Comparison between NiO-CPE and CPE by using impedance spectroscopy
3.4.4 Comparison between NiO-CPE and CPE by using chronocoulometry
3.5 Effect of scan rate
3.6 Effect of an accumulation time
3.7 pH study of the supporting electrolyte
3.8 Interference
3.9 Reproducibility, repeatability and stability of 20% NiO-CPE
4 Analytical application
4.1 Calibration curve and detection limit
4.2 Application
5 Conclusions
References
영어 초록
In this study platform, electrocatalytic detection of the antibiotic chloramphenicol (CAP) in phosphate buffer (pH 7) was easily achieved using a carbon paste electrode modified with NiO nanoparticles (note NiO-CPE). The peak reduction potential of chloramphenicol on the modified electrode is at (− 0.60 V/NiO-CPE vs. Ag/AgCl), its electrochemical behavior is completely irreversible, and controlled by adsorption phenomena. An excellent electrocatalytic activity has been demonstrated by the modified elaborated electrode towards the NO2 attracting group on the side chain of chloramphenicol. The structure and chemical composition of the NiO-CPE sensor were analyzed by SEM, and the X-ray diffraction results indicated that nickel oxide microcrystals were formed on the carbon sheets. The electrochemical characteristics of the NiO-CPE sensor were examined by cyclic voltammetry and electrochemical impedance spectroscopy in comparison with the unmodified carbon. Since the DPV technique allows plotting the linearity curve between the electrocatalytic current intensity of the Chloramphenicol peak and their concentration, the proposed sensor showed a remarkable detection limit of 1.08 × 10– 8 mol/L M (S/N = 3) and a wide determination range from 100 to 0.1 μM for Chloramphenicol. The developed sensor was successfully applied in the detection of Chloramphenicol in real samples.참고 자료
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