基于静电纺丝技术制备传感Hg^(2+)的复合纳米纤维膜

Preparation of Fluorescent Nanofibrous Film as a Sensing Material for Hg^(2+) via Electrospinning

利用静电纺丝技术制备了负载有Hg^(2+)有机荧光探针的聚丙烯腈(PAN)复合纳米纤维膜,该纤维膜具有较高的比表面积和机械强度,保证了探针分子的负载,当浸泡在Hg^(2+)溶液当中,其多孔网络结构大大地提高了Hg^(2+)在纤维膜内的扩散速度,确保了Hg^(2+)充分接触到分布在纤维膜中的探针分子,使得复合纤维膜发生了明显的荧光淬灭,从而实现对Hg^(2+)的识别,荧光测试显示纳米纤维膜对Hg^(2+)的检测限可达到1.057×10^(-6)mol/L。

The polyacrylonitrile （PAN） nanofibrous film with probe for Hg^2＋ was fabricated by electrospinning. It has high surface area-to-volume ratio and mechanical strength, which the guaranteed probes were loaded. When the com-posite nanofibrous film was immersed in Hg^2＋ solution, the diffusion velocity of Hg^2＋ inside nanofibrous film can be greatly improve in the porous network structure,which ensures Hg^2＋ to contact to the distributed probes in the film ful-ly,then the obvious fluorescence quenching is displayed in the composite film,so as to realize the recognition of Hg^2＋. The fluorescence test revealed that the detection limit of the nanofibrous film towards Hg^2＋ could reach 1.057×10^-6mol/L.