Fig. 5: Sensing performances stability and sensing mechanism of (NH2)1.24-UiO-66@TDCOF. | Nature Communications

Fig. 5: Sensing performances stability and sensing mechanism of (NH2)1.24-UiO-66@TDCOF.

From: Strategic energy-level modulation in porous heterojunctions: advancing gas sensing through Type-I to Type-II transitions

Fig. 5: Sensing performances stability and sensing mechanism of (NH2)1.24-UiO-66@TDCOF.

a Long-term stability of (NH2)1.24-UiO-66@TDCOF (inset: response-recovery curves toward 100 ppm NO2 based on a seven-day interval). b PXRD patterns of (NH2)1.24-UiO-66@TDCOF before and after sensing test. c Possible sensing mechanism for (NH2)1.24-UiO-66@TDCOF. Under light, (NH2)1.24-UiO-66@TDCOF generates a significant number of photogenerated electrons via the heterojunction. These electrons are transferred to NO2 adsorbed through the imine bond, thereby enhancing electrical conductivity. Source data are provided as a Source Data file.

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