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. 2025 Mar 10;21(17):2411522. doi: 10.1002/smll.202411522

Figure 5.

Figure 5

Performances of bismuth oxyhydroxide and oxysulfide‐based gas sensor. a) Resistance changes of bismuth oxyhydroxide and oxysulfide sensor with response to 250 ppb NO2 under purple light irradiation. b) Sensor response of Bi2O1.22S1.88 toward 100 ppb NO2 at various light irradiation. c) Dynamic gas response of Bi2O1.22S1.88 sensor toward different NO2 concentrations at purple light irradiation. d) Correlation between gas response and NO2 concentration for Bi2O1.22S1.88 sensor. e) Error analysis of the gas sensing response in Figure 5c and Figure S14 (Supporting Information). f) Response and recovery time under different NO2 concentrations, the error bar is estimated by the statistic in Figure 5c and Figure S14 (Supporting Information). g) Repeatability of Bi2O1.22S1.88 sensor to 250 ppb NO2 under purple light activation at room temperature. h) Selectivity of Bi2O1.22S1.88 based gas sensor. i) Long‐term stability of Bi2O1.22S1.88 based gas sensor toward 50 ppb NO2.