TY - JOUR
T1 - Glassy carbon electrode modified with poly(methyl orange) as an electrochemical platform for the determination of 4-nitrophenol at nanomolar levels
AU - Giribabu, Krishnan
AU - Haldorai, Yuvaraj
AU - Rethinasabapathy, Muruganantham
AU - Jang, Sung Chan
AU - Suresh, Ranganathan
AU - Cho, Wan Seob
AU - Han, Young Kyu
AU - Roh, Changhyun
AU - Huh, Yun Suk
AU - Narayanan, Vengidusamy
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - In this study, poly(methyl orange) (PMO) was synthesized by electrodeposition onto a glassy carbon electrode (GCE), and the resulting structure was examined for the determination of 4-nitrophenol (4-NP). Cyclic voltammetry revealed that the PMO-modified GCE (PMO/GCE) exhibited excellent electrocatalytic activity for the oxidation of 4-NP in a 0.5-M phosphate buffer solution. In contrast, the bare GCE showed no oxidation peak. Interestingly, PMO/GCE exhibited an oxidation peak at approximate 0.93 V, and the background current was higher than that of the bare GCE. Furthermore, the developed electrochemical sensor exhibited a linear relationship with the 4-NP concentration from 600 nM to 10 μM, and the limit of detection was 170 nM (signal/noise = 3). The sensor demonstrated excellent selectivity, good stability, and reproducibility. It was applied to the determination of 4-NP in water samples by the standard addition method and gave recoveries of 99.2–100.9%.
AB - In this study, poly(methyl orange) (PMO) was synthesized by electrodeposition onto a glassy carbon electrode (GCE), and the resulting structure was examined for the determination of 4-nitrophenol (4-NP). Cyclic voltammetry revealed that the PMO-modified GCE (PMO/GCE) exhibited excellent electrocatalytic activity for the oxidation of 4-NP in a 0.5-M phosphate buffer solution. In contrast, the bare GCE showed no oxidation peak. Interestingly, PMO/GCE exhibited an oxidation peak at approximate 0.93 V, and the background current was higher than that of the bare GCE. Furthermore, the developed electrochemical sensor exhibited a linear relationship with the 4-NP concentration from 600 nM to 10 μM, and the limit of detection was 170 nM (signal/noise = 3). The sensor demonstrated excellent selectivity, good stability, and reproducibility. It was applied to the determination of 4-NP in water samples by the standard addition method and gave recoveries of 99.2–100.9%.
KW - 4-Nitrophenol
KW - Differential pulse voltammetry
KW - Electrochemical determination
KW - Poly(methyl orange)
UR - http://www.scopus.com/inward/record.url?scp=85019090982&partnerID=8YFLogxK
U2 - 10.1016/j.cap.2017.04.016
DO - 10.1016/j.cap.2017.04.016
M3 - Article
AN - SCOPUS:85019090982
SN - 1567-1739
VL - 17
SP - 1114
EP - 1119
JO - Current Applied Physics
JF - Current Applied Physics
IS - 8
ER -