Nami-Ana S F, Nasresfahani Sh, Tashkhourian J, Shamsipur M, Zargarpour Z, Sheikhi M H
Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71456, Iran.
Department of Electrical and Computer Engineering, Golpayegan College of Engineering, Isfahan University of Technology, Golpayegan 87717-67498, Iran.
ACS Appl Mater Interfaces. 2021 Aug 25;13(33):39791-39805. doi: 10.1021/acsami.1c07116. Epub 2021 Aug 16.
In the present study, the carbon monoxide (CO) sensing property of Cu(II)-l-aspartic acid nanofibers/polyaniline (PANI) nanofibers composite was investigated at room temperature. The nanofiber composite was formed through the ultrasound mixing of emeraldine salt PANI nanofibers and Cu(II)-l-aspartic acid nanofibers, which were synthesized by using a polymerization process and simple self-assembly method, respectively. The nanofibers composite demonstrated a branched structure in which the Cu(II)-l-aspartic acid nanofiber framework is similar to the trunk of a tree and the polyaniline nanofibers is like its branches. It seems that this special structure and one-dimension/one-dimension interface are suitable for gas adsorption and sensing. The performance of the prepared sensor toward CO gas was investigated at room temperature in a wide concentration range (200-8000 ppm). The experimental results indicate that the incorporation of amino acid-based copper metal-biomolecule framework nanofibers to PANI nanofibers enhances the response value (12.41% to 4000 ppm), yielding good selectivity and acceptable response and recovery characteristics (220 s/240 s) at room temperature. The detection limit of Cu(II)-l-aspartic acid nanofibers/PANI nanofibers sensor for carbon monoxide is obtained at 120 ppm.
在本研究中，对 Cu(II)-L-天冬氨酸纳米纤维/聚苯胺（PANI）纳米纤维复合材料在室温下的一氧化碳（CO）传感性能进行了研究。该纳米纤维复合材料是通过将翡翠盐聚苯胺纳米纤维与 Cu(II)-L-天冬氨酸纳米纤维超声混合形成的，这两种纳米纤维分别采用聚合工艺和简单的自组装方法合成。纳米纤维复合材料呈现出一种分支结构，其中 Cu(II)-L-天冬氨酸纳米纤维框架类似于树干，聚苯胺纳米纤维则像树枝。这种特殊结构和一维/一维界面似乎适合气体吸附和传感。在室温下，对制备的传感器在较宽浓度范围（200 - 8000 ppm）内对 CO 气体的性能进行了研究。实验结果表明，将基于氨基酸的铜金属 - 生物分子框架纳米纤维掺入聚苯胺纳米纤维中可提高响应值（对 4000 ppm 为 12.41%），在室温下具有良好的选择性以及可接受的响应和恢复特性（220 s/240 s）。Cu(II)-L-天冬氨酸纳米纤维/PANI 纳米纤维传感器对一氧化碳的检测限为 120 ppm。
