Polyaniline (PAni) optical sensor in chloroform detection

被引：39

作者：

Ahad, Irma Zulayka Mohamad ^{[1
]}

Harun, Sulaiman Wadi ^{[2
]}

Gan, Seng Neon ^{[1
]}

Phang, Sook Wai ^{[3
]}

机构：

[1] Univ Malaya, Dept Chem, Fac Sci, Kuala Lumpur 50603, Malaysia

[2] Univ Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 50603, Malaysia

[3] Tunku Abdul Rahman Univ Coll, Fac Sci Appl, Dept Phys Sci, Jalan Genting Kelang, Kuala Lumpur 53300, Malaysia

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 261卷

关键词：

Polyaniline; AOT dopant ratio; FBG; Chloroform; Bragg wavelength shift;

D O I：

10.1016/j.snb.2018.01.082

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 degrees C, 0 degrees C and 25 degrees C) toward the efficiency of sensors were being investigated. Among the PAnis, PAni 5: 5 (0 degrees C) possessed the highest conductivity (1.627 x 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 (C1(delta-)) of chloroform with the partial positive charge (NH delta+) 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. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：97 / 105

页数：9

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