Li Peng, Zhang Mingfa, Liu Xueying, Su Zhiqiang, Wei Gang
Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing 100029, China.
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Nanomaterials (Basel). 2017 Aug 24;7(9):236. doi: 10.3390/nano7090236.
A novel polyacrylonitrile (PAN) nanofibrous membrane conjugated with platinum nanoparticles (PtNPs) was fabricated by electrospinning and electrostatic assembly techniques. In this procedure, PAN was electrospun with 3-aminopropyltriethoxysilane (APS) together as precursor materials. First, amine groups were introduced onto PAN nanofibers, and then the as-prepared negative-charged platinum nanoparticles (PtNPs) were conjugated onto the surface of the amino-modified PAN nanofibers uniformly by the electrostatic interaction-mediated assembly. The fabricated PAN-PtNPs hybrid nanofibrous membrane was further utilized to modify the glassy carbon electrodes and was used for the fabrication of a non-enzymatic amperometric sensor to detect hydrogen peroxide (H₂O₂). The electrochemical results indicated that, due to the uniform dispersion of PtNPs and the electrostatic interaction between amine groups and PtNPs, the fabricated PAN-PtNPs nanofibrous membrane-based electrochemical sensor showed excellent electrocatalytic activity toward H₂O₂, and the chronoamperometry measurements illustrated that the fabricated sensor had a high sensitivity for detecting H₂O₂. It is anticipated that the strategies used in this work will not only guide the design and fabrication of functional polymeric nanofiber-based biomaterials and nanodevices, but also extend their potential applications in energy storage, cytology, and tissue engineering.
通过静电纺丝和静电组装技术制备了一种与铂纳米颗粒（PtNPs）共轭的新型聚丙烯腈（PAN）纳米纤维膜。在此过程中，PAN与3-氨丙基三乙氧基硅烷（APS）一起作为前驱体材料进行静电纺丝。首先，将胺基引入PAN纳米纤维上，然后通过静电相互作用介导的组装将制备好的带负电荷的铂纳米颗粒（PtNPs）均匀地共轭到氨基修饰的PAN纳米纤维表面。制备的PAN-PtNPs杂化纳米纤维膜进一步用于修饰玻碳电极，并用于制备非酶电流型传感器以检测过氧化氢（H₂O₂）。电化学结果表明，由于PtNPs的均匀分散以及胺基与PtNPs之间的静电相互作用，制备的基于PAN-PtNPs纳米纤维膜的电化学传感器对H₂O₂表现出优异的电催化活性，计时电流法测量表明制备的传感器对检测H₂O₂具有高灵敏度。预计这项工作中使用的策略不仅将指导基于功能性聚合物纳米纤维的生物材料和纳米器件的设计与制造，还将扩展它们在能量存储、细胞学和组织工程中的潜在应用。
