It is reported that some experts have prepared yellow tungsten oxide nanofibers (WO3 nanofibers) via electrostatic spinning with an average diameter of about 200nm. Wherein, WO3 nanofibers consist of a large amount of tungsten trioxide nano particles. These experts also studied the gas sensitivity characteristics of WO3 nanofibers-based gas sensors to H2S.
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The results showed that when the working temperature is 150 °C, the sensor's response to H2S gas with a volume fraction of 2 × 10 ~ (-5) reaches 72, the response time and recovery time are 4s and 21s, and the detection limit is 5x10 ~ (-9), indicating that the sensor has practical application value in low volume fraction H2S gas detection. In other words, the gas sensitivity of yellow tungsten oxide nanofibers based gas sensor shows up as better sensitivity, selectivity, and faster response recovery characteristics for trace H2S gas.
