Abstract
Background: The NOX (e.g. NO2) is harmful to human health and environmental quality. It is of great interest to monitor the hazardous NOX with a simple, reliable, and sensitive sensor. Currently, the commonly used detection methods have disadvantages of complex operation, unstable cycling performance and low sensitivity.
Objective: In this paper, rGO coated Ni foam supported MnO2 is synthesized to develop a more advanced detection method for the rapid analysis of NO2.
Methods: A three-dimensional nickel foam supported MnO2 and rGO (MnO2/rGO@NF) was prepared by a hydrothermal method for application in binder-free electrode of NO2 sensor.
Results: The MnO2/rGO@NF composite displayed significantly better NO2 sensing performance compared to single MnO2@NF or rGO@NF. The excellent sensing response (5.9%) as well as high cycling stability were observed in the presence of 50.0 ppm NO2 at room temperature. Furthermore, the mechanism of the great gas-sensing performance was also investigated by the density functional theory (DFT).
Conclusion: These results were very important to further design and prepare new sensitive materials applied in binder-free electrode of gas NO2 sensors.
Keywords: rGO/MnO2, 3D foam, gas sensor, room temperature, density functional theory, sensors.
[http://dx.doi.org/10.1016/j.snb.2016.08.177]
[http://dx.doi.org/10.1016/j.snb.2016.08.130]
[http://dx.doi.org/10.1016/j.snb.2017.05.085]
[http://dx.doi.org/10.1016/j.jaap.2017.09.004]
[http://dx.doi.org/10.1021/acsaelm.1c00703]
[http://dx.doi.org/10.1038/nmat1967] [PMID: 17660825]
[http://dx.doi.org/10.1021/am505949a] [PMID: 25399743]
[http://dx.doi.org/10.1016/j.snb.2016.04.152]
[http://dx.doi.org/10.1039/c4ra02453b]
[http://dx.doi.org/10.1038/srep00166] [PMID: 22355681]
[http://dx.doi.org/10.1021/ja205693t] [PMID: 21894991]
[http://dx.doi.org/10.1021/ac503234e] [PMID: 25556377]
[http://dx.doi.org/10.1016/j.jallcom.2017.08.150]
[http://dx.doi.org/10.1016/j.snb.2011.11.062]
[http://dx.doi.org/10.1016/j.snb.2011.12.080]
[http://dx.doi.org/10.1016/j.snb.2017.02.084]
[http://dx.doi.org/10.1016/j.jallcom.2015.07.212]
[http://dx.doi.org/10.1016/j.diamond.2016.11.003]
[http://dx.doi.org/10.1016/j.snb.2014.10.091]
[http://dx.doi.org/10.1007/s00339-016-9684-8]
[http://dx.doi.org/10.1016/j.electacta.2015.08.092]
[http://dx.doi.org/10.1016/j.snb.2015.06.115]
[http://dx.doi.org/10.1039/C4TA07112C]
[http://dx.doi.org/10.1016/S0925-4005(99)00241-5]
[http://dx.doi.org/10.1016/j.snb.2015.07.070]
[http://dx.doi.org/10.1021/acs.jctc.1c01116] [PMID: 35157474]
[http://dx.doi.org/10.1021/acs.jctc.0c01080] [PMID: 33529019]
[http://dx.doi.org/10.1016/j.apsusc.2015.09.168]
[http://dx.doi.org/10.1016/j.snb.2015.04.119]
[http://dx.doi.org/10.1016/j.snb.2015.07.084]