Dai Hong, Gong Lingshan, Xu Guifang, Li Xiuhua, Zhang Shupei, Lin Yanyu, Zeng Baoshan, Yang Caiping, Chen Guonan
College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350108, P.R. China.
Analyst. 2015 Jan 21;140(2):582-9. doi: 10.1039/c4an02021a.
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.
在此，在电纺聚合物纳米纤维上设计了用于甲醛的简单分子识别位点。为了提高电纺聚合物纳米纤维的导电性，将碳纳米管引入所得纳米纤维中。通过使用这些功能化的纳米复合纤维构建仿生传感器平台，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所引起的明显变化。优化了实验条件，然后建立了低浓度甲醛传感的定量方法。相关结果表明，基于仿生识别纳米纤维的传感器对甲醛具有出色的识别能力。该传感器的线性响应范围为1×10⁻⁶ mol L⁻¹至1×10⁻² mol L⁻¹，检测限为8×10⁻⁷ mol L⁻¹。本研究提供了一种快速、可行且灵敏的甲醛检测方法，具有良好的抗干扰能力和稳定性，能够满足甲醛检测的实际需求。
