Development of a Highly Selective and Sensitive Electrochemical Sensor for Bi3+ Determination Based on Nano-Structured Bismuth-Imprinted Polymer Modified Carbon/Carbon Nanotube Paste Electrode Publisher



Alizadeh T¹ ; Hamidi N¹ ; Ganjali MR^{1, 2} ; Nourozi P¹ Show Affiliations
Source: Sensors and Actuators# B: Chemical Published:2017

Abstract

A new nano-structured bismuth(III)-imprinted polymer was prepared by copolymerization of Bi(III)-methylene succinate complex and ethylene glycol dimethacrylate in acetonitrile via precipitation polymerization technique. The polymeric nanoparticles were then used as the Bi3+selective modifier of a carbon/carbon nanotube paste electrode. Bismuth ions were accumulated on the surface of the electrode, immersed in the Bi3+solution for a definite time. Then, the anodic striping differential pulse voltammetric signal of the modified electrode was recorded as analytical signal which was significantly higher than that recorded by the non-imprinted polymer based electrode, at the same experimental conditions. Compared to the previously reported carbon paste electrodes, this sensor was more selective, regarding potential interfering species of Cu2+and Ag+. The electrode exhibited a dynamic linear response range of 0.2–2 μmol L−1and detection limit of 8.9 nmol L−1for Bi3+measurement. The sensitivity of the sensor was 112.25 μA μM−1, indicating an excellent sensitivity of the developed sensor. The sensor was successfully applied for the electrochemical determination of Bi3+ions in environmental, pharmaceutical and biological samples. © 2017 Elsevier B.V.