Polyaniline-Functionalized Nanofibers for Colorimetric Detection of HCl Vapor
Polyaniline-Functionalized Nanofibers for Colorimetric Detection of HCl Vapor
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DOI：
10.1021/acsomega.8b00054
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发表时间：
2018-03-01
期刊：
影响因子：
4.1
通讯作者：
Tang, Christina
中科院分区：
文献类型：
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作者：
Thornton, Breland T. E.;Harrison, Andrew;Tang, Christina
氯化氢（HCl）气体是工业过程中的有害副产品。促进便携式和远程检测的比色方法是特别期望的。我们将聚苯胺接枝到静电纺尼龙纳米纤维的表面，以减少传质。使用所得的纳米纤维，我们证明比色检测的HCl在亚ppm水平。我们研究了纤维的可重复使用性，并观察到由于元素分析表明PANI的脱掺杂，多次使用的检测限增加了两倍。使用目视检测的检测限进行了比较，分光光度分析。通过漫反射光谱法从CIE LAB颜色空间分析的Δ E与目视检测相比，将检测限提高了5倍。这种分析是一种很有前途的方法，用于使用简单的商业数码相机进行远程检测，以实现低检测限。
Hydrogen chloride (HCl) gas is a hazardous byproduct of industrial processes. Colorimetric approaches to facilitate portable and remote detection are especially desirable. We graft polyaniline to the surface of electrospun nylon nanofibers to minimize mass transfer. Using the resulting nanofibers, we demonstrate colorimetric detection of HCl at sub-ppm levels. We investigated the reusability of the fibers and observed a twofold increase in the limit of detection with multiple uses because of dedoping of the PANi indicated by elemental analysis. The limit of detection using visual detection was compared to spectrophotometric analysis. The Delta E from CIE LAB color space analysis via diffuse reflectance spectroscopy enhances the limit of detection by -fivefold when compared to visual detection. This analysis is a promising approach for remote detection using simple commercial digital cameras to achieve low limits of detection.