An electrochemical impedimetric sensor based on biomimetic electrospun nanofibers for formaldehyde.
An electrochemical impedimetric sensor based on biomimetic electrospun nanofibers for formaldehyde.
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DOI：
10.1039/c4an02021a
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发表时间：
2015-01
期刊：
影响因子：
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通讯作者：
Hong Dai;Lingshan Gong;Guifang Xu;Xiuhua Li;Shupei Zhang;Yanyu Lin;Baoshan Zeng;Caiping Yang;Guonan Chen
中科院分区：
文献类型：
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作者：
Hong Dai;Lingshan Gong;Guifang Xu;Xiuhua Li;Shupei Zhang;Yanyu Lin;Baoshan Zeng;Caiping Yang;Guonan Chen
在静电纺聚合物纳米纤维上设计了简单的甲醛分子识别位点。为了提高电纺聚合物纳米纤维的导电性，在纳米纤维中引入了碳纳米管。利用这些功能化纳米复合纤维制作仿生传感器平台，通过电化学阻抗谱（EIS）监测识别位点与甲醛分子之间的识别变化。对实验条件进行优化，建立了低浓度甲醛定量检测方法。实验结果表明，基于仿生识别纳米纤维的传感器对甲醛具有良好的识别能力。传感器的线性响应范围为1 × 10(-6) mol L(-1) ~ 1 × 10(-2) mol L(-1)，检出限为8 × 10(-7) mol L（-1）。本研究提供了一种快速、可行、灵敏、抗干扰能力强、稳定性好的甲醛检测方法，能够满足甲醛检测的实际要求。
Herein, simple molecular recognition sites for formaldehyde were designed on electrospun polymer nanofibers. In order to improve the conductivity of the electrospun polymer nanofibers, carbon nanotubes were introduced into the resulting nanofibers. By employing these functionalized nanocomposite fibers to fabricate a biomimetic sensor platform, an obvious change caused by recognition between recognition sites and formaldehyde molecules was monitored through electrochemical impedance spectroscopy (EIS). The experimental conditions were optimized and then a quantitative method for formaldehyde sensing in low concentration was established. The relative results demonstrated that the sensor based on biomimetic recognition nanofibers displays an excellent recognition capacity toward formaldehyde. The linear response range of the sensor was between 1 × 10(-6) mol L(-1) and 1 × 10(-2) mol L(-1), with the detection limit of 8 × 10(-7) mol L(-1). The presented research provided a fast, feasible and sensitive method for formaldehyde with good anti-interference capabilities and good stability, which could meet the practical requirement for formaldehyde assay.