Polyaniline (PAni) optical sensor in chloroform detection
A novel Fiber Bragg grating (FBG) coated with PAni film was used as a sensitive optical sensor for chloroform detection. In this study, the effect of synthesis parameters such as different dopant ratios (Ani: AOT = 5: 3, 5: 5 and 5: 7) and different polymerization temperatures (–5 °C, 0 °C and 25 °C...
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| Main Authors: | , , , |
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| Format: | Article |
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Elsevier
2018
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/21269/ https://doi.org/10.1016/j.snb.2018.01.082 |
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| Summary: | A novel Fiber Bragg grating (FBG) coated with PAni film was used as a sensitive optical sensor for chloroform detection. In this study, the effect of synthesis parameters such as different dopant ratios (Ani: AOT = 5: 3, 5: 5 and 5: 7) and different polymerization temperatures (–5 °C, 0 °C and 25 °C) toward the efficiency of sensors were being investigated. Among the PAnis, PAni 5: 5 (0 °C) possessed the highest conductivity (1.627 × 10−2 S/cm) and the best efficiency (sensitivity = 0.0015) with response time of 7 s. The mechanism during chloroform detection was studied through Fourier Transform Infrared (FTIR) and Ultraviolet-visible (UV–vis) analysis, and the results showed clearly the physical interaction of the partial negative charge (Clδ−) of chloroform with the partial positive charge (NHδ+) on PAni chain. Besides, the sensor performance such as recyclability, selectivity, limit of detection (LOD), limit of quantitation (LOQ) and real sample analysis was studied in details in this study. |
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