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Computer-aided design and synthesis of molecular imprinting polymers based on doubly oriented functional multiwalled carbon nanotubes for electrochemically sensing bisphenol A
Reactive & Functional Polymers ( IF 5.1 ) Pub Date : 2020-10-22 , DOI: 10.1016/j.reactfunctpolym.2020.104767
Yiyun Zhang , Weihong Huang , Xifeng Yin , Kwabena Agyarko Sarpong , Liming Zhang , Yanchun Li , Shan Zhao , Hengdeng Zhou , Wenming Yang , Wanzhen Xu

Bisphenol A (BPA) is a type of EDCs that can affect the endocrine system and cause a serious of diseases. In order to develop better detection methods, this study reported a novel nanocomposite for electrode modification, engineered by quantum chemical simulation, based on doubly oriented functional multiwalled carbon nanotubes, utilized molecular imprinting polymers combine with electrochemistry for selective detection of BPA. The hydrogen bonding formation was successfully displayed, which explicated a theoretical basis for polymers synthesis. The consisted of nanocomposites functionalized multiwalled carbon nanotubes which were grafted with amino groups as both monomers and carriers, instead of the traditional steps of adding monomers. The excellent electrical conductivity of multiwalled carbon nanotubes amplified the electrochemical signal and the amino groups grafting made an increase in recognition sites. The results displayed a linear relation of 10−10 to 10−5 mol L−1, with a low limit of detection (LOD) as 1.57 × 10−11 mol L−1. Furtherly, the composites were characterized by SEM, TEM, FT-IR, UV–vis spectrophotometry, BET, together with classical electrochemical measurements. The modified sensor did not only enhance the performance of selectivity, repeatability and stability, but also was ensured that a limited analogues interference. In addition, the results of real samples detection in plastic products predicted its potential in sensing BPA at ultra-trace level among other environmental pollutants.



中文翻译:

基于双取向功能多壁碳纳米管的分子印迹聚合物的计算机辅助设计和合成,用于电化学检测双酚A

双酚A(BPA)是一种可影响内分泌系统并引起严重疾病的EDC。为了开发更好的检测方法,本研究报告了一种新型的用于电极修饰的纳米复合材料,它是通过量子化学模拟设计的,基于双取向功能多壁碳纳米管,利用分子印迹聚合物与电化学结合来选择性检测BPA。成功地展示了氢键的形成,这为聚合物合成提供了理论基础。由纳米复合材料官能化的多壁碳纳米管组成,这些碳纳米管接枝有氨基作为单体和载体,而不是传统的添加单体步骤。多壁碳纳米管的优异电导率放大了电化学信号,氨基接枝增加了识别位点。结果显示线性关系为10-10至10 -5  mol L -1,检测下限(LOD)为1.57×10 -11  mol L -1。此外,通过SEM,TEM,FT-IR,紫外可见分光光度法,BET以及经典的电化学测量对复合材料进行表征。改进的传感器不仅增强了选择性,可重复性和稳定性,而且还确保了类似物的有限干扰。此外,塑料产品中真实样品的检测结果预测了其在其他痕量环境污染物中以超痕量检测BPA的潜力。

更新日期:2020-10-29
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