期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 101, 期 -, 页码 165-172出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.06.018
关键词
Reduced graphene oxide; Chitosan; Composite material; Nitrogen dioxide; Paper-based gas sensor; Flexible and disposable sensor
资金
- National Research Foundation of Korea (NRF) [NRF-2017M3A9F1031229, NRF-2017R1E1A1A01075439, NRF-2019R1C1C1005668]
- Korea Environment Industry & Technology Institute (KEITI)
- Korea Ministry of Environment (MOE) [20190 02800009]
- Korea University [K2111511]
A flexible and disposable paper-based NO2 sensor based on a reduced graphene oxide/chitosan (rGO/CS) composite is proposed in this study. By analyzing the conductive change of the composite, nitrogen dioxide can be detected in a concentration range of 0-100 ppm, demonstrating its practical application potential.
Nitrogen dioxide (NO2) is a representative toxicant in air pollution that mostly arises from the exhaust gas released by automobiles. It is related to various respiratory diseases such as pneumonia and sudden infant death syndrome. Additionally, because the toxicity of nitrogen dioxide is high in overpopulated areas (i.e., a capital or metropolis), the development of simple, practical, and facile sensors is highly needed. This work presents a flexible and disposable paper-based NO2 sensor based on a reduced graphene oxide/chitosan (rGO/CS) composite. The synthesized rGO/CS composite can be easily flexed and deformed into various shapes, which are attributed to chitosan molecules that function as a dispersion and reduction agent and support material. In addition, this composite can be attached to paper owing to its adhesive property; hence it can be utilized in versatile applications in a disposable manner. By analyzing the conductive change of the rGO/CS composite when it reacts with NO2, we can detect nitrogen dioxide in a concentration range of 0-100 ppm with a detection limit of 1 ppm. Moreover, we performed NO2 detection in the exhaust gas released by automobiles using the rGO/CS composite for practical application. The results indicated that the rGO/CS composite has the potential to be used in feasible gas sensing as a facile and disposable sensor under various conditions. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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