ZnO-Loaded Graphene for NO 2 Gas Sensing.

Autor: Alouani, Mohamed Ayoub, Casanova-Cháfer, Juan, Güell, Frank, Peña-Martín, Elisa, Ruiz-Martínez-Alcocer, Sara, de Bernardi-Martín, Santiago, García-Gómez, Alejandra, Vilanova, Xavier, Llobet, Eduard
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Zdroj: Sensors (14248220); Jul2023, Vol. 23 Issue 13, p6055, 13p
Abstrakt: This paper investigates the effect of decorating graphene with zinc oxide (ZnO) nanoparticles (NPs) for the detection of NO2. In this regard, two graphene sensors with different ZnO loadings of 5 wt.% and 20 wt.% were prepared, and their responses towards NO2 at room temperature and different conditions were compared. The experimental results demonstrate that the graphene loaded with 5 wt.% ZnO NPs (G95/5) shows better performance at detecting low concentrations of the target gas than the one loaded with 20 wt.% ZnO NPs (G80/20). Moreover, measurements under dry and humid conditions of the G95/5 sensor revealed that the material is very sensitive to ambient moisture, showing an almost eight-fold increase in NO2 sensitivity when the background changes from dry to 70% relative humidity. Regarding sensor selectivity, it presents a significant selectivity towards NO2 compared to other gas compounds. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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