Malaysian Journal of Analytical Sciences Vol 21 No 4
(2017): 762 - 769
DOI:
https://doi.org/10.17576/mjas-2017-2104-01
Chemical sensor for hydrazine detection using polyaniline
thin film
(Sensor Kimia Untuk Mengesan Hidrazin Dengan Menggunakan Polyanilina
Berbentuk Filem Nipis)
Kavirajaa Pandian Sambasevam1, Sharifah
Mohamad2, Sook-Wai Phang3*
1School
of Chemistry and Environment, Faculty of Applied Sciences,
Universiti Teknologi MARA, Negeri Sembilan Branch,Kuala
Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia
2Department
of Chemistry, Faculty of Science,
University of Malaya, 50603 Kuala Lumpur, Malaysia
3Department of Physical Science, Faculty of Applied
Sciences,
Tunku Abdul
Rahman University College, 53300 Kuala Lumpur, Malaysia
*Corresponding author: pinkyphang@gmail.com
Received: 17
August 2016; Accepted: 15 June 2017
Abstract
Polyaniline
(PANI) doped with dioctyl sodium sulfosuccinate (AOT) was prepared by chemical
oxidative polymerization method. This PANI thin film was used as an effective
chemical sensor at room temperature for different concentrations of hydrazine
(10, 100, 1000 and 10000 ppm) detection. The PANI chemical sensor has shown a
good recyclability up to 10 cycles with 2 minutes response time and immediate
recovery time. The sensor response was proved by red-shift of the UV-Vis at 780
nm which indicates the transformation of emeraldine salt (ES, conducting state)
to leucoemeraldine salt (LES, non-conducting state) of PANI. Besides that, the
intensity ratio of IQuinoid/IBenzenoid at FTIR
spectroscopy can explicit the predominating benzenoid species that formed as a result
of ES interaction with hydrazine. In this study, a very simple and inexpensive
sensor setup has been successfully developed for hydrazine detection compare to
the complicated traditional chemical sensors.
Keywords: polyaniline, hydrazine, dioctyl sodium
sulfosuccinate, chemical sensor, conductivity
Abstrak
Polianilina (PANI)
yang didopkan dengan natrium dioktil sulfosuksinat (AOT) telah disediakan melalui
kaedah pempolimeran pengoksidaan kimia. Filem nipis PANI telah digunakan
sebagai sensor kimia pada suhu bilik untuk mengesan hidrazin dengan kepekatan yang
berbeza (10, 100, 1000 dan 10000 ppm). Sensor kimia PANI telah menunjukkan penggunaan
semula sehingga 10 kali dengan masa 2 minit dengan masa pemulihan segera. Keputusan
sensor telah dibuktikan dengan peralihan-merah UV-Vis pada 780 nm yang
menunjukkan transformasi garam emeraldina (ES, konduktif) kepada garam
leukoemeraldina (LES, tidak konduktif). Selain itu, nisbah keamatan IKuinoid / IBenzenoid di FTIR spektroskopi
telah menjelaskan spesies benzenoid lebih banyak sebagai hasil interaksi ES
dengan hidrazin. Dalam kajian ini, penyediaan sensor yang sangat mudah dan
murah telah berjaya diperkembangkan untuk mengesan hidrazin berbanding dengan
sensor kimia tradisional yang rumit.
Kata kunci: polianilina,
hidrazin, natrium dioktil sulfosuksinat, sensor kimia, konduktiviti
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