Polyaniline (PAni) optical sensor in chloroform detection
Document Type
Article
Publication Date
1-1-2018
Abstract
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.
Keywords
Polyaniline, AOT dopant ratio, FBG, Chloroform, Bragg wavelength shift
Divisions
fac_eng,CHEMISTRY
Publication Title
Sensors and Actuators B: Chemical
Volume
261
Publisher
Elsevier