TY - JOUR
T1 - Simultaneous voltammetric determination of nitrophenol isomers at ordered mesoporous carbon modified electrode
AU - Zhang, Tingting
AU - Lang, Qiaolin
AU - Yang, Dapeng
AU - Li, Liang
AU - Zeng, Lingxing
AU - Zheng, Cheng
AU - Li, Tie
AU - Wei, Mingdeng
AU - Liu, Aihua
PY - 2013
Y1 - 2013
N2 - In this paper, ordered mesoporous carbons (OMCs) modified glassy carbon electrode (GCE) (OMCs/GCE) was employed to investigate the electrochemical behavior of o-nitrophenol (o-NP), m-nitrophenol (m- NP) and p-nitrophenol (p-NP) in ambient-N2 phosphate buffer saline. Compared with bare GCE, the OMCs/GCE exhibited obvious electrocatalytic activity towards nitrophenol isomers. The electrochemical reaction mechanism of nitrophenol at the modified electrode was also studied. At OMCs/GCE, the three nitrophenol isomers could be identified and separated successfully and the simultaneous determination was realized by detecting the reduction peaks of their intermediate products (at 0.209 V vs. saturated calomel electrode for p-NP, 0.020 V for m-NP and -0.201 V for o-NP) with differential pulse voltammetry. Under the optimized experimental conditions, the linear ranges of the calibration curves were 2-90 μM for p-NP, 1-100 μM for m-NP and 0.5-90 μM for o-NP with limits of detection of 0.1 μM, 0.06 μM and 0.08 μM for p-NP, m-NP and o-NP, respectively (S/N = 3). Therefore, the proposed method is simple, rapid, stable, sensitive, specific, reproducible and cost-effective, which can be applicable for real samples detection.
AB - In this paper, ordered mesoporous carbons (OMCs) modified glassy carbon electrode (GCE) (OMCs/GCE) was employed to investigate the electrochemical behavior of o-nitrophenol (o-NP), m-nitrophenol (m- NP) and p-nitrophenol (p-NP) in ambient-N2 phosphate buffer saline. Compared with bare GCE, the OMCs/GCE exhibited obvious electrocatalytic activity towards nitrophenol isomers. The electrochemical reaction mechanism of nitrophenol at the modified electrode was also studied. At OMCs/GCE, the three nitrophenol isomers could be identified and separated successfully and the simultaneous determination was realized by detecting the reduction peaks of their intermediate products (at 0.209 V vs. saturated calomel electrode for p-NP, 0.020 V for m-NP and -0.201 V for o-NP) with differential pulse voltammetry. Under the optimized experimental conditions, the linear ranges of the calibration curves were 2-90 μM for p-NP, 1-100 μM for m-NP and 0.5-90 μM for o-NP with limits of detection of 0.1 μM, 0.06 μM and 0.08 μM for p-NP, m-NP and o-NP, respectively (S/N = 3). Therefore, the proposed method is simple, rapid, stable, sensitive, specific, reproducible and cost-effective, which can be applicable for real samples detection.
KW - Nitrophenol isomers
KW - Ordered mesoporous carbons
KW - Simultaneous determination
KW - Voltammetric detection
UR - https://www.scopus.com/pages/publications/84879473869
U2 - 10.1016/j.electacta.2013.05.055
DO - 10.1016/j.electacta.2013.05.055
M3 - 文章
AN - SCOPUS:84879473869
SN - 0013-4686
VL - 106
SP - 127
EP - 134
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -