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Ultrahigh Selective Room-Temperature Ammonia Gas Sensor Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube Nanocomposites by the Solvothermal Method
[Image: see text] Resistive-based gas sensors have been considered as the most favorable gas sensors for detection of toxic gases and volatile organic compounds (VOCs) because of their simple structure, low cost, high sensitivity, ease of use, and high stability. Unfortunately, wide application of r...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6796937/ https://www.ncbi.nlm.nih.gov/pubmed/31646238 http://dx.doi.org/10.1021/acsomega.9b02185 |
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author | Seekaew, Yotsarayuth Pon-On, Weeraphat Wongchoosuk, Chatchawal |
author_facet | Seekaew, Yotsarayuth Pon-On, Weeraphat Wongchoosuk, Chatchawal |
author_sort | Seekaew, Yotsarayuth |
collection | PubMed |
description | [Image: see text] Resistive-based gas sensors have been considered as the most favorable gas sensors for detection of toxic gases and volatile organic compounds (VOCs) because of their simple structure, low cost, high sensitivity, ease of use, and high stability. Unfortunately, wide application of resistive-based gas sensors is limited by their low selectivity. In this article, we present the fabrication of ultrahigh selective NH(3) gas sensor based on tin–titanium dioxide/reduced graphene/carbon nanotube (Sn–TiO(2)@rGO/CNT) nanocomposites. The Sn–TiO(2)@rGO/CNT nanocomposites with different molar ratios of Sn/Ti (1:10, 3:10, and 5:10) were synthesized via the solvothermal method. Characterizations by scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy confirmed the decoration of Sn–TiO(2) nanoparticles on rGO/CNT nanocomposite surfaces. The Sn–TiO(2)@rGO/CNT nanocomposite gas sensor exhibited high response and ultrahigh selectivity to NH(3) against toluene, dimethylformamide, acetone, ethanol, methanol, isopropanol, formaldehyde, hydrogen, carbon dioxide, acetylene, and VOCs in paint thinners at room temperature. The Sn–TiO(2)@rGO/CNT nanocomposite gas sensor with molar ratio of Sn/Ti = 1:10 showed the highest response to NH(3) over other molar ratios of Sn/Ti as well as pure rGO/CNT and Sn–TiO(2) gas sensors. The ammonia-sensing mechanisms of the Sn–TiO(2)@rGO/CNT gas sensor were proposed based on the formation of p–n heterojunctions of p-type rGO/CNT and n-type Sn–TiO(2) nanoparticles via a low-temperature oxidizing reaction process. |
format | Online Article Text |
id | pubmed-6796937 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-67969372019-10-23 Ultrahigh Selective Room-Temperature Ammonia Gas Sensor Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube Nanocomposites by the Solvothermal Method Seekaew, Yotsarayuth Pon-On, Weeraphat Wongchoosuk, Chatchawal ACS Omega [Image: see text] Resistive-based gas sensors have been considered as the most favorable gas sensors for detection of toxic gases and volatile organic compounds (VOCs) because of their simple structure, low cost, high sensitivity, ease of use, and high stability. Unfortunately, wide application of resistive-based gas sensors is limited by their low selectivity. In this article, we present the fabrication of ultrahigh selective NH(3) gas sensor based on tin–titanium dioxide/reduced graphene/carbon nanotube (Sn–TiO(2)@rGO/CNT) nanocomposites. The Sn–TiO(2)@rGO/CNT nanocomposites with different molar ratios of Sn/Ti (1:10, 3:10, and 5:10) were synthesized via the solvothermal method. Characterizations by scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy confirmed the decoration of Sn–TiO(2) nanoparticles on rGO/CNT nanocomposite surfaces. The Sn–TiO(2)@rGO/CNT nanocomposite gas sensor exhibited high response and ultrahigh selectivity to NH(3) against toluene, dimethylformamide, acetone, ethanol, methanol, isopropanol, formaldehyde, hydrogen, carbon dioxide, acetylene, and VOCs in paint thinners at room temperature. The Sn–TiO(2)@rGO/CNT nanocomposite gas sensor with molar ratio of Sn/Ti = 1:10 showed the highest response to NH(3) over other molar ratios of Sn/Ti as well as pure rGO/CNT and Sn–TiO(2) gas sensors. The ammonia-sensing mechanisms of the Sn–TiO(2)@rGO/CNT gas sensor were proposed based on the formation of p–n heterojunctions of p-type rGO/CNT and n-type Sn–TiO(2) nanoparticles via a low-temperature oxidizing reaction process. American Chemical Society 2019-10-03 /pmc/articles/PMC6796937/ /pubmed/31646238 http://dx.doi.org/10.1021/acsomega.9b02185 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Seekaew, Yotsarayuth Pon-On, Weeraphat Wongchoosuk, Chatchawal Ultrahigh Selective Room-Temperature Ammonia Gas Sensor Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube Nanocomposites by the Solvothermal Method |
title | Ultrahigh Selective Room-Temperature Ammonia Gas Sensor
Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube
Nanocomposites by the Solvothermal Method |
title_full | Ultrahigh Selective Room-Temperature Ammonia Gas Sensor
Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube
Nanocomposites by the Solvothermal Method |
title_fullStr | Ultrahigh Selective Room-Temperature Ammonia Gas Sensor
Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube
Nanocomposites by the Solvothermal Method |
title_full_unstemmed | Ultrahigh Selective Room-Temperature Ammonia Gas Sensor
Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube
Nanocomposites by the Solvothermal Method |
title_short | Ultrahigh Selective Room-Temperature Ammonia Gas Sensor
Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube
Nanocomposites by the Solvothermal Method |
title_sort | ultrahigh selective room-temperature ammonia gas sensor
based on tin–titanium dioxide/reduced graphene/carbon nanotube
nanocomposites by the solvothermal method |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6796937/ https://www.ncbi.nlm.nih.gov/pubmed/31646238 http://dx.doi.org/10.1021/acsomega.9b02185 |
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