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L-Glutamine-assisted synthesis of flower-like NiO and ball-flower-like NiO/Ag as an electrochemical sensor for lead(II) detection

Title
L-Glutamine-assisted synthesis of flower-like NiO and ball-flower-like NiO/Ag as an electrochemical sensor for lead(II) detection
Author
Erfan Zal Nezhad
Keywords
ANODIC-STRIPPING VOLTAMMETRY; GLASSY-CARBON ELECTRODE; SILVER ELECTRODE; FILM ELECTRODE; CADMIUM; PRECONCENTRATION; SEPARATION; SAMPLES; CD(II); PLASMA
Issue Date
2017-07
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v. 7, no. 49, page. 30870-30878
Abstract
Flower-like NiO (F-NiO) and ball-flower-like NiO/Ag (BF-NiO-Ag) were synthesized in the presence of L-glutamine as an electrochemical sensor for lead(II) detection. The structure and morphology of the F-NiO and BF-NiO-Ag were studied by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). Energy dispersive X-ray confirmed the presence of Ag on the surface of the BF-NiO-Ag. The results confirmed that Ag+ was reduced to Ag metal in the presence of L-glutamine. The FESEM images confirmed the effect of L-glutamine and Ag on the morphology and the available surface area. Electrochemical impedance spectroscopy results confirmed the effect of the loaded Ag on the conductivity of the BF-NiO-Ag. Differential pulse voltammetry results gave a linear working range for the concentration of lead(II) between 1.5 and 10 nM with a LOD of 0.06 nM (S/N = 3). The sensitivity of this linear segment is 0.3 mu A nM(-1). The average recoveries, recovery percentage and relative standard deviation obtained from four determinations (n = 4) confirmed the feasibility of the proposed method for the quantitative detection of certain concentration ranges of Pb2+.
URI
https://pubs.rsc.org/en/content/articlelanding/2017/RA/C7RA04201A#!divAbstracthttp://repository.hanyang.ac.kr/handle/20.500.11754/115000
ISSN
2046-2069
DOI
10.1039/c7ra04201a
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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