An Electrochemical Sensor of Poly(EDOT-pyridine-EDOT)/Graphitic Carbon Nitride Composite for Simultaneous Detection of Cd2+ and Pb2

Shuai Ding; Ahmat Ali; Ruxangul Jamal; Ling Xiang; Ziping Zhong; Tursun Abdiryim

doi:10.3390/ma11050702

An Electrochemical Sensor of Poly(EDOT-pyridine-EDOT)/Graphitic Carbon Nitride Composite for Simultaneous Detection of Cd²⁺ and Pb²

Materials (Basel). 2018 Apr 29;11(5):702. doi: 10.3390/ma11050702.

Authors

Shuai Ding^{1

2}, Ahmat Ali^{3

4}, Ruxangul Jamal^{5

6}, Ling Xiang^{7

8}, Ziping Zhong^{9

10}, Tursun Abdiryim^{11

12}

Affiliations

¹ Key Laboratory of Petroleum and Gas Fine Chemicals, Educational Ministry of China, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China. dingshuai910526@sina.com.
² Key Laboratory of Functional Polymers, Xinjiang University, Urumqi 830046, China. dingshuai910526@sina.com.
³ Key Laboratory of Petroleum and Gas Fine Chemicals, Educational Ministry of China, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China. ahmatjanchem@126.com.
⁴ Key Laboratory of Functional Polymers, Xinjiang University, Urumqi 830046, China. ahmatjanchem@126.com.
⁵ Key Laboratory of Petroleum and Gas Fine Chemicals, Educational Ministry of China, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China. jruxangul@sina.com.
⁶ Key Laboratory of Functional Polymers, Xinjiang University, Urumqi 830046, China. jruxangul@sina.com.
⁷ Key Laboratory of Petroleum and Gas Fine Chemicals, Educational Ministry of China, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China. xiangling8023@sina.com.
⁸ Key Laboratory of Functional Polymers, Xinjiang University, Urumqi 830046, China. xiangling8023@sina.com.
⁹ Key Laboratory of Petroleum and Gas Fine Chemicals, Educational Ministry of China, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China. zzp1037934439@sina.com.
¹⁰ Key Laboratory of Functional Polymers, Xinjiang University, Urumqi 830046, China. zzp1037934439@sina.com.
¹¹ Key Laboratory of Petroleum and Gas Fine Chemicals, Educational Ministry of China, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China. tursunabdir@sina.com.cn.
¹² Key Laboratory of Functional Polymers, Xinjiang University, Urumqi 830046, China. tursunabdir@sina.com.cn.

Abstract

In this study, poly(2,5-bis(3,4-ethylenedioxythienyl)pyridine)/graphitic carbon nitride composites (poly(BPE)/g-C₃N₄) were prepared by an in situ chemical polymerization method. Composites were characterized by using Fourier transform infrared spectroscopy (FT-IR), ultraviolet⁻visible absorption spectra (UV⁻vis), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Furthermore, electrochemical sensors were applied for the electrochemical determination of Cd²⁺ and Pb²⁺ using the differential pulse voltammetry (DPV) method. The results indicated that 10 wt % poly(BPE)/g-C₃N₄ composite-modified electrode exhibited linear detection ranging from 0.12 to 7.2 μM and 0.08 to 7.2 μM for Cd²⁺ and Pb²⁺, with detection limits (S/N = 3) of 0.018 μM and 0.00324 μM. Interference analysis suggested that the 10 wt % poly(BPE)/g-C₃N₄-modified electrode can be applied for the detection of the Cd²⁺ and Pb²⁺ in real samples.

Keywords: DPV; electrochemical sensor; heavy metals; poly(BPE)/g-C3N4 composite; simultaneous detection.