Polyaniline (PAni) optical sensor in chloroform detection

Mohamad Ahad, Irma Zulayka and Harun, Sulaiman Wadi and Gan, Seng Neon and Phang, Sook Wai (2018) Polyaniline (PAni) optical sensor in chloroform detection. Sensors and Actuators B: Chemical, 261. pp. 97-105. ISSN 0925-4005

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Official URL: https://doi.org/10.1016/j.snb.2018.01.082

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.

Item Type: Article
Uncontrolled Keywords: Polyaniline; AOT dopant ratio; FBG; Chloroform; Bragg wavelength shift
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Dept of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 21 May 2019 06:28
Last Modified: 21 May 2019 06:28
URI: http://eprints.um.edu.my/id/eprint/21269

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