Wu Wei, Ali Ahmat, Jamal Ruxangul, Abdulla Mihray, Bakri Tursunnisahan, Abdiryim Tursun
Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Xinjiang Uygur Autonomous Region, Xinjiang University Urumqi 830046 P. R. China
Key Laboratory of Functional Polymers, Xinjiang University Urumqi 830046 People's Republic of China.
RSC Adv. 2019 Oct 28;9(60):34691-34698. doi: 10.1039/c9ra02161b.
In this paper, poly(3,4-ethylenedioxythiophene)/graphitic carbon nitride (PEDOT/g-CN) composites were prepared by the bromine catalysed polymerization (BCP) method with varying weight ratios of monomer to g-CN. For comparison, solid-state polymerization (SSP) and metal oxidative polymerization (MOP) methods were also used for the synthesis of PEDOT/g-CN composites. Electrochemical determination of heavy metal ions (Cd and Pb) was carried out by differential pulse voltammetry (DPV) on composite-modified glass carbon electrodes (GCEs), which were prepared by different methods. The obtained composites were analysed by Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible absorption spectroscopy (UV-vis), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results showed that the bromine catalysed polymerization (BCP) method is an effective way to prepare the PEDOT/g-CN composite, and the combination of PEDOT with g-CN can improve the electrochemical activity of electrode materials. And, the composite from the BCP method modified electrode (PEDOT/10 wt% g-CN/GCE) exhibited the widest linear responses for Cd and Pb, ranging from 0.06-12 μM and 0.04-11.6 μM with detection limits (S/N = 3) of 0.0014 μM and 0.00421 μM, respectively.
在本文中，采用溴催化聚合（BCP）法，通过改变单体与石墨相氮化碳（g-CN）的重量比来制备聚（3,4-乙撑二氧噻吩）/石墨相氮化碳（PEDOT/g-CN）复合材料。为作比较，还采用了固态聚合（SSP）和金属氧化聚合（MOP）方法来合成PEDOT/g-CN复合材料。通过差分脉冲伏安法（DPV），在由不同方法制备的复合修饰玻碳电极（GCE）上对重金属离子（Cd和Pb）进行电化学测定。利用傅里叶变换红外光谱（FT-IR）、紫外-可见吸收光谱（UV-vis）、X射线衍射（XRD）、能量色散X射线光谱（EDS）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对所得复合材料进行分析。结果表明，溴催化聚合（BCP）法是制备PEDOT/g-CN复合材料的有效方法，PEDOT与g-CN的结合可提高电极材料的电化学活性。并且，由BCP法修饰电极（PEDOT/10 wt% g-CN/GCE）得到的复合材料对Cd和Pb表现出最宽的线性响应范围，分别为0.06 - 12 μM和0.04 - 11.6 μM，检测限（S/N = 3）分别为0.0014 μM和0.00421 μM。
