The Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite

Hollow indium trioxide (In<sub>2</sub>O<sub>3</sub>) nanofibers fabricated via an effectively combined method of electrospinning and high-temperature calcination were coated with nitrogen-doped graphene quantum dots (N-GQDs) prepared by a hydrothermal process through electros...

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Autores principales:	Sheng-Zhe Hong, Qing-Yi Huang, Tzong-Ming Wu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	polyaniline nitrogen-doped graphene quantum dot hollow indium trioxide nanofiber composite ammonia gas sensor Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/63aaa8a9f7ff403da2152d67167b9d62
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spelling	oai:doaj.org-article:63aaa8a9f7ff403da2152d67167b9d622021-11-11T18:43:33ZThe Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite10.3390/polym132136762073-4360https://doaj.org/article/63aaa8a9f7ff403da2152d67167b9d622021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3676https://doaj.org/toc/2073-4360Hollow indium trioxide (In<sub>2</sub>O<sub>3</sub>) nanofibers fabricated via an effectively combined method of electrospinning and high-temperature calcination were coated with nitrogen-doped graphene quantum dots (N-GQDs) prepared by a hydrothermal process through electrostatic interaction. The N-GQD-coated hollow In<sub>2</sub>O<sub>3</sub> nanofibers served as a core for the synthesis of polyaniline (PANI)/N-GQD/hollow In<sub>2</sub>O<sub>3</sub> nanofiber ternary composites using in situ chemical oxidative polymerization. The chemical structure and morphology of the fabricated ternary composites were characterized using Fourier transform infrared, field-emission scanning electron microscopy, and transmission electron microscopy. The gas-sensing performances of the ternary composites were estimated by a homemade dynamic test system which was supplied with a real-time resistance acquisition platform at room temperature. The response value of the PANI/N-GQD/hollow In<sub>2</sub>O<sub>3</sub> nanofiber sensor with a loading of 20 wt% N-GQD-coated hollow In<sub>2</sub>O<sub>3</sub> nanofiber and an exposure of 1 ppm NH<sub>3</sub> was 15.2, which was approximately more than 4.4 times higher than that of the PANI sensor. This ternary composite sensor was proved to be very sensitive in the detection of NH<sub>3</sub> at a range of concentration between 0.6 ppm and 2.0 ppm at room temperature, which is crucial in the detection of hepatic or kidney disease in human breath. The PANI/N-GQD/hollow In<sub>2</sub>O<sub>3</sub> nanofiber sensor also revealed higher selectivity and repeatability when exposed to 1.0 and 2.0 ppm NH<sub>3</sub> at room temperature. Because of the excellent selectivity and repeatability in the detection of 1.0 and 2.0 ppm NH<sub>3</sub> at room temperature achieved in this study, it is considered that the PANI/N-GQD/hollow In<sub>2</sub>O<sub>3</sub> nanofiber composite sensor will be a favored gas-sensing material applied on human breath for the detection of hepatic or kidney disease.Sheng-Zhe HongQing-Yi HuangTzong-Ming WuMDPI AGarticlepolyanilinenitrogen-doped graphene quantum dothollow indium trioxide nanofibercompositeammonia gas sensorOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3676, p 3676 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polyaniline nitrogen-doped graphene quantum dot hollow indium trioxide nanofiber composite ammonia gas sensor Organic chemistry QD241-441
spellingShingle	polyaniline nitrogen-doped graphene quantum dot hollow indium trioxide nanofiber composite ammonia gas sensor Organic chemistry QD241-441 Sheng-Zhe Hong Qing-Yi Huang Tzong-Ming Wu The Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite
description	Hollow indium trioxide (In<sub>2</sub>O<sub>3</sub>) nanofibers fabricated via an effectively combined method of electrospinning and high-temperature calcination were coated with nitrogen-doped graphene quantum dots (N-GQDs) prepared by a hydrothermal process through electrostatic interaction. The N-GQD-coated hollow In<sub>2</sub>O<sub>3</sub> nanofibers served as a core for the synthesis of polyaniline (PANI)/N-GQD/hollow In<sub>2</sub>O<sub>3</sub> nanofiber ternary composites using in situ chemical oxidative polymerization. The chemical structure and morphology of the fabricated ternary composites were characterized using Fourier transform infrared, field-emission scanning electron microscopy, and transmission electron microscopy. The gas-sensing performances of the ternary composites were estimated by a homemade dynamic test system which was supplied with a real-time resistance acquisition platform at room temperature. The response value of the PANI/N-GQD/hollow In<sub>2</sub>O<sub>3</sub> nanofiber sensor with a loading of 20 wt% N-GQD-coated hollow In<sub>2</sub>O<sub>3</sub> nanofiber and an exposure of 1 ppm NH<sub>3</sub> was 15.2, which was approximately more than 4.4 times higher than that of the PANI sensor. This ternary composite sensor was proved to be very sensitive in the detection of NH<sub>3</sub> at a range of concentration between 0.6 ppm and 2.0 ppm at room temperature, which is crucial in the detection of hepatic or kidney disease in human breath. The PANI/N-GQD/hollow In<sub>2</sub>O<sub>3</sub> nanofiber sensor also revealed higher selectivity and repeatability when exposed to 1.0 and 2.0 ppm NH<sub>3</sub> at room temperature. Because of the excellent selectivity and repeatability in the detection of 1.0 and 2.0 ppm NH<sub>3</sub> at room temperature achieved in this study, it is considered that the PANI/N-GQD/hollow In<sub>2</sub>O<sub>3</sub> nanofiber composite sensor will be a favored gas-sensing material applied on human breath for the detection of hepatic or kidney disease.
format	article
author	Sheng-Zhe Hong Qing-Yi Huang Tzong-Ming Wu
author_facet	Sheng-Zhe Hong Qing-Yi Huang Tzong-Ming Wu
author_sort	Sheng-Zhe Hong
title	The Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite
title_short	The Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite
title_full	The Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite
title_fullStr	The Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite
title_full_unstemmed	The Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite
title_sort	room temperature highly sensitive ammonia gas sensor based on polyaniline and nitrogen-doped graphene quantum dot-coated hollow indium oxide nanofiber composite
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/63aaa8a9f7ff403da2152d67167b9d62
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The Room Temperature Highly Sensitive Ammonia Gas Sensor Based on Polyaniline and Nitrogen-Doped Graphene Quantum Dot-Coated Hollow Indium Oxide Nanofiber Composite

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