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- * Various testing methods (SEM, EDX, FT-IR, XRD, BET) confirmed the film's morphology and electrochemical properties, indicating its effectiveness for sensing applications.
- * The tube sensor made from PANI/Eu nanofibers demonstrated excellent performance by detecting low volumes of NH gas (0.3 mL) with a 435% response at a concentration of 0.25 ppm and quick response/recovery times of 5 seconds each.
Article Abstract
A novel polyaniline (PANI)/Eu nanofiber sensing film was prepared in the presence of Eu(NO) which serves as structure-directed agent. The morphological, component, crystallinity and electrochemical properties were carried out by using Scanning Electron Microscope (SEM), Energy-Dispersive X-ray (EDX), Fourier Transform Infrared spectroscopy (FT-IR), X-Ray Diffraction (XRD) and Brunauer-Emmett-Teller (BET) techniques. The results indicated the nanofiber-like network with porous structure appeared in the PANI embedded by Eu ions, thereby leading to large specific surface area. Furthermore, the PANI/Eu nanofibers were grown onto the inner wall of capillary glass to form the tube sensor. By the sensing measurements, this tube sensor enabled the detection of low-volume (0.3 mL) NH for response 435% at concentration of 0.25 ppm with a short response time (5 s) and recovery time (5 s), and the performances of reproducibility and selectivity were also excellent. The above results demonstrated the potential application of PANI/Eu tube sensor for low-volume NH gas.
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| http://dx.doi.org/10.1016/j.aca.2019.09.049 | DOI Listing |
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