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Nanostructured WO(3)/graphene composites for sensing NO(x) at room temperature

WO(3) has emerged as an outstanding nanomaterial composite for gas sensing applications. In this paper, we report the synthesis of WO(3) using two different capping agents, namely, oxalic acid and citric acid, along with cetyltrimethyl ammonium bromide (CTAB). The effect of capping agent on the morp...

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Autores principales: Adhyapak, Parag V., Bang, Amruta D., More, Pooja, Munirathnam, N. R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086740/
https://www.ncbi.nlm.nih.gov/pubmed/35548787
http://dx.doi.org/10.1039/c8ra06065g
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author Adhyapak, Parag V.
Bang, Amruta D.
More, Pooja
Munirathnam, N. R.
author_facet Adhyapak, Parag V.
Bang, Amruta D.
More, Pooja
Munirathnam, N. R.
author_sort Adhyapak, Parag V.
collection PubMed
description WO(3) has emerged as an outstanding nanomaterial composite for gas sensing applications. In this paper, we report the synthesis of WO(3) using two different capping agents, namely, oxalic acid and citric acid, along with cetyltrimethyl ammonium bromide (CTAB). The effect of capping agent on the morphology of WO(3) material was investigated and presented. The WO(3) materials were characterized using X-ray diffraction analysis (XRD), field emission transmission electron microscopy (FETEM), field emission scanning electron microscopy (FESEM), particle size distribution (PSD) analysis, and UV-visible spectroscopic analysis. WO(3) synthesized using oxalic acid exhibited orthorhombic phase with crystallite size of 10 nm, while WO(3) obtained using citric acid shows monoclinic phase with crystallite size of 20 nm. WO(3) obtained using both capping agents were used to study their gas sensing characteristics, particularly for NO(x) gas. The cross sensitivity towards interfering gases and organic vapors such as acetone, ethanol, methanol and triethylamine (TEA) was monitored and explained. Furthermore, the composites of WO(3) were prepared with graphene by physical mixing to improve the sensitivity, response and recovery time. The composites were tested for gas sensing at room temperature as well as at 50 °C and 100 °C. The results indicated that the citric acid-assisted WO(3) material exhibits better response towards NO(x) sensing when compared with oxalic acid-assisted WO(3). Moreover, the sensitivity of the WO(3)/graphene nanocomposite was better than that of the pristine WO(3) material towards NO(x) gas. The WO(3) composite prepared using citric acid as capping agent and graphene exhibits sensing response and recovery time of 29 and 24 s, respectively.
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spelling pubmed-90867402022-05-10 Nanostructured WO(3)/graphene composites for sensing NO(x) at room temperature Adhyapak, Parag V. Bang, Amruta D. More, Pooja Munirathnam, N. R. RSC Adv Chemistry WO(3) has emerged as an outstanding nanomaterial composite for gas sensing applications. In this paper, we report the synthesis of WO(3) using two different capping agents, namely, oxalic acid and citric acid, along with cetyltrimethyl ammonium bromide (CTAB). The effect of capping agent on the morphology of WO(3) material was investigated and presented. The WO(3) materials were characterized using X-ray diffraction analysis (XRD), field emission transmission electron microscopy (FETEM), field emission scanning electron microscopy (FESEM), particle size distribution (PSD) analysis, and UV-visible spectroscopic analysis. WO(3) synthesized using oxalic acid exhibited orthorhombic phase with crystallite size of 10 nm, while WO(3) obtained using citric acid shows monoclinic phase with crystallite size of 20 nm. WO(3) obtained using both capping agents were used to study their gas sensing characteristics, particularly for NO(x) gas. The cross sensitivity towards interfering gases and organic vapors such as acetone, ethanol, methanol and triethylamine (TEA) was monitored and explained. Furthermore, the composites of WO(3) were prepared with graphene by physical mixing to improve the sensitivity, response and recovery time. The composites were tested for gas sensing at room temperature as well as at 50 °C and 100 °C. The results indicated that the citric acid-assisted WO(3) material exhibits better response towards NO(x) sensing when compared with oxalic acid-assisted WO(3). Moreover, the sensitivity of the WO(3)/graphene nanocomposite was better than that of the pristine WO(3) material towards NO(x) gas. The WO(3) composite prepared using citric acid as capping agent and graphene exhibits sensing response and recovery time of 29 and 24 s, respectively. The Royal Society of Chemistry 2018-10-04 /pmc/articles/PMC9086740/ /pubmed/35548787 http://dx.doi.org/10.1039/c8ra06065g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Adhyapak, Parag V.
Bang, Amruta D.
More, Pooja
Munirathnam, N. R.
Nanostructured WO(3)/graphene composites for sensing NO(x) at room temperature
title Nanostructured WO(3)/graphene composites for sensing NO(x) at room temperature
title_full Nanostructured WO(3)/graphene composites for sensing NO(x) at room temperature
title_fullStr Nanostructured WO(3)/graphene composites for sensing NO(x) at room temperature
title_full_unstemmed Nanostructured WO(3)/graphene composites for sensing NO(x) at room temperature
title_short Nanostructured WO(3)/graphene composites for sensing NO(x) at room temperature
title_sort nanostructured wo(3)/graphene composites for sensing no(x) at room temperature
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086740/
https://www.ncbi.nlm.nih.gov/pubmed/35548787
http://dx.doi.org/10.1039/c8ra06065g
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