Fast response ammonia sensor based on porous thin film of polyaniline/sulfonated nickel phthalocyanine composites

Abstract

Porous thin film composites of PANI/NiTSPc were deposited across the gaps of interdigitated Au electrodes (IAE) by an electrochemical polymerization method. The PANI/NiTSPc films were characterized by scanning electron microscopy (SEM) images, atomic force microscopy (AFM) images, energy dispersive spectra (EDS), Raman spectra and Fourier transform infrared (FT-IR) spectra. Ammonia (NH3) gas-sensing properties of the films prepared at optimum conditions were examined at room temperature. The observed response value (S) of the film to 100 ppm NH3 was 2.75 with a response time as short as 10 s. Furthermore, fast recovery rate, good reproducibility and acceptable long-term stability were also observed over a concentration range from 5 to 2500 ppm The outstanding sensing performance may be attributed to the porous, ultra-thin film structure and the “NH3-capture” effect of the “flickering” NiTSPc molecules. Therefore, the proposed PANI/NiTSPc nanocomposite thin film sensors are excellent potential candidates for NH3 detection.

Metadata

Authors/Creators:	Zhihua, L Xucheng, Z Jiyong, S Xiaobo, Z Xiaowei, H Tahir, HE Holmes, M https://orcid.org/0000-0002-6819-1048
Copyright, Publisher and Additional Information:	© 2015 Elsevier B.V. All rights reserved. This is an author produced version of an article published in Sensors and Actuators B: Chemical. Uploaded in accordance with the publisher's self-archiving policy.
Keywords:	Polyaniline; Phthalocyanine; Ammonia; Sensor; Porous thin film
Dates:	Accepted: 17 October 2015 Published (online): 20 October 2015 Published: April 2016
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Environment (Leeds) > School of Food Science and Nutrition (Leeds) > FSN Colloids and Food Processing (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	27 Oct 2021 12:08
Last Modified:	25 Jun 2023 22:47
Status:	Published
Publisher:	Elsevier
Identification Number:	https://doi.org/10.1016/j.snb.2015.10.062
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