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Three-Dimensional MoS(2)/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO(2) Gas Sensors

This study presents three-dimensional (3D) MoS(2)/reduced graphene oxide (rGO)/graphene quantum dots (GQDs) hybrids with improved gas sensing performance for NO(2) sensors. GQDs were introduced to prevent the agglomeration of nanosheets during mixing of rGO and MoS(2). The resultant MoS(2)/rGO/GQDs...

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Detalles Bibliográficos
Autores principales: Yang, Cheng, Wang, Yanyan, Wu, Zhekun, Zhang, Zhanbo, Hu, Nantao, Peng, Changsi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8954772/
https://www.ncbi.nlm.nih.gov/pubmed/35335714
http://dx.doi.org/10.3390/nano12060901
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author Yang, Cheng
Wang, Yanyan
Wu, Zhekun
Zhang, Zhanbo
Hu, Nantao
Peng, Changsi
author_facet Yang, Cheng
Wang, Yanyan
Wu, Zhekun
Zhang, Zhanbo
Hu, Nantao
Peng, Changsi
author_sort Yang, Cheng
collection PubMed
description This study presents three-dimensional (3D) MoS(2)/reduced graphene oxide (rGO)/graphene quantum dots (GQDs) hybrids with improved gas sensing performance for NO(2) sensors. GQDs were introduced to prevent the agglomeration of nanosheets during mixing of rGO and MoS(2). The resultant MoS(2)/rGO/GQDs hybrids exhibit a well-defined 3D nanostructure, with a firm connection among components. The prepared MoS(2)/rGO/GQDs-based sensor exhibits a response of 23.2% toward 50 ppm NO(2) at room temperature. Furthermore, when exposed to NO(2) gas with a concentration as low as 5 ppm, the prepared sensor retains a response of 15.2%. Compared with the MoS(2)/rGO nanocomposites, the addition of GQDs improves the sensitivity to 21.1% and 23.2% when the sensor is exposed to 30 and 50 ppm NO(2) gas, respectively. Additionally, the MoS(2)/rGO/GQDs-based sensor exhibits outstanding repeatability and gas selectivity. When exposed to certain typical interference gases, the MoS(2)/rGO/GQDs-based sensor has over 10 times higher sensitivity toward NO(2) than the other gases. This study indicates that MoS(2)/rGO/GQDs hybrids are potential candidates for the development of NO(2) sensors with excellent gas sensitivity.
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spelling pubmed-89547722022-03-26 Three-Dimensional MoS(2)/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO(2) Gas Sensors Yang, Cheng Wang, Yanyan Wu, Zhekun Zhang, Zhanbo Hu, Nantao Peng, Changsi Nanomaterials (Basel) Article This study presents three-dimensional (3D) MoS(2)/reduced graphene oxide (rGO)/graphene quantum dots (GQDs) hybrids with improved gas sensing performance for NO(2) sensors. GQDs were introduced to prevent the agglomeration of nanosheets during mixing of rGO and MoS(2). The resultant MoS(2)/rGO/GQDs hybrids exhibit a well-defined 3D nanostructure, with a firm connection among components. The prepared MoS(2)/rGO/GQDs-based sensor exhibits a response of 23.2% toward 50 ppm NO(2) at room temperature. Furthermore, when exposed to NO(2) gas with a concentration as low as 5 ppm, the prepared sensor retains a response of 15.2%. Compared with the MoS(2)/rGO nanocomposites, the addition of GQDs improves the sensitivity to 21.1% and 23.2% when the sensor is exposed to 30 and 50 ppm NO(2) gas, respectively. Additionally, the MoS(2)/rGO/GQDs-based sensor exhibits outstanding repeatability and gas selectivity. When exposed to certain typical interference gases, the MoS(2)/rGO/GQDs-based sensor has over 10 times higher sensitivity toward NO(2) than the other gases. This study indicates that MoS(2)/rGO/GQDs hybrids are potential candidates for the development of NO(2) sensors with excellent gas sensitivity. MDPI 2022-03-09 /pmc/articles/PMC8954772/ /pubmed/35335714 http://dx.doi.org/10.3390/nano12060901 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yang, Cheng
Wang, Yanyan
Wu, Zhekun
Zhang, Zhanbo
Hu, Nantao
Peng, Changsi
Three-Dimensional MoS(2)/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO(2) Gas Sensors
title Three-Dimensional MoS(2)/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO(2) Gas Sensors
title_full Three-Dimensional MoS(2)/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO(2) Gas Sensors
title_fullStr Three-Dimensional MoS(2)/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO(2) Gas Sensors
title_full_unstemmed Three-Dimensional MoS(2)/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO(2) Gas Sensors
title_short Three-Dimensional MoS(2)/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO(2) Gas Sensors
title_sort three-dimensional mos(2)/reduced graphene oxide nanosheets/graphene quantum dots hybrids for high-performance room-temperature no(2) gas sensors
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8954772/
https://www.ncbi.nlm.nih.gov/pubmed/35335714
http://dx.doi.org/10.3390/nano12060901
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