NDLI: Phthalocyanines and Porphyrins/Polyaniline Composites (PANI/CuPctBu and $PANI/TPPH_{2}$) as Sensing Materials for Ammonia Detection

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Phthalocyanines and Porphyrins/Polyaniline Composites (PANI/CuPctBu and $PANI/TPPH_{2}$) as Sensing Materials for Ammonia Detection

Content Provider	MDPI
Author	Pauly, Alain Ali, Sahal Saad Varenne, Christelle Brunet, Jérôme Llobet, Eduard Ndiaye, Amadou L.
Copyright Year	2022
Description	We combined a conducting polymer, polyaniline (PANI), with an organic semiconducting macrocyclic (MCs) material. The macrocycles are the phthalocyanines and porphyrins used to tune the electrical properties of the PANI, which benefits from their ability to enhance sensor response. For this, we proceeded by a simple ultrasonically assisted reaction involving the two components, i.e., the PANI matrix and the MCs, to achieve the synthesis of the composite nanostructure PANI/MCs. The composite nanostructure has been characterized and deposited on interdigitated electrodes (IDEs) to construct resistive sensor devices. The isolated nanostructured composites present good electrical properties dominated by PANI electronic conductivity, and the characterization reveals that both components are present in the nanostructure. The experimental results obtained under gas exposures show that the composite nanostructures can be used as a sensing material with enhanced sensing properties. The sensing performance under different conditions, such as ambient humidity, and the sensor’s operating temperature are also investigated. Sensing behavior in deficient humidity levels and their response at different temperatures revealed unusual behaviors that help to understand the sensing mechanism. Gas sensors based on PANI/MCs demonstrate significant stability over time, but this stability is highly reduced after experiments in lower humidity conditions and at high temperatures.
Starting Page	891
e-ISSN	20734360
DOI	10.3390/polym14050891
Journal	Polymers
Issue Number	5
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2022-02-24
Access Restriction	Open
Subject Keyword	Polymers Polyaniline Phthalocyanine Porphyrins Ammonia Resistive Sensors Humidity Temperature
Content Type	Text
Resource Type	Article

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