Promotion effect of Pt on a SnO2–WO3 material for NO sensing

Improvement in NO2 Gas Sensing Properties of Semiconductor-Type Sensors by Loading Pt into BiVO4 Nanocomposites at Room Temperature

“…Note that the response and recovery times of samples with high Pt concentrations (5 wt.% and 10 wt.%) were slower than those of the 3 wt.% Pt/BiVO 4 nanocomposite. These results are similar to those reported in [31,33], indicating that at higher Pt concentrations, the formation of Pt aggregates tends to hinder the response and recovery of Pt/BiVO 4 nanocomposites. Overall, the 3 wt.% Pt/BiVO 4 sensor presented the best NO 2 sensing performance and was therefore selected as the gas sensor material for all subsequent experiments.…”

“…Catalysis of platinum can help in the enhancement of responsiveness of materials used for sensors to the various provided gases, due to a phenomenon referred to as the spillover effect [38,39]. The activity of Pt in this catalysis can help in accelerating the adsorption behaviour of molecular level oxygen; the adding of Pt dopants has a significant effect on surface area, which can lead to further chemisorbed oxygen species spillover, which increases the number of active sites on the BiVO 4 [11,26,33,40]. This increases the number of electrons that are captured, and in so doing enhances the response of the sensor.…”

All‐Inorganic CsPbBr3/Cs4PbBr6 Perovskite/ZnO for Detection of NO with Enhanced Response and Low‐Work Temperature

“…Nitric oxide (NO) is a main environmental pollutant released from automobiles and combustion facilities or naturally generated during the electrical discharges of lightning and thunderstorm, [1] which is not only a reason for the depletion of stratospheric ozone but also a precursor of the acid rain. [1][2][3] Besides, it is also a crucial messenger molecule involved in the plentiful physiological and pathological process. Therefore, the high-sensitive detection of NO is very important to protect environment and human health.…”

“…Therefore, the high-sensitive detection of NO is very important to protect environment and human health. [2] NO is often detected by employing the metal oxide semiconductor gas sensors extensively [3] due to low cost, realtime measurement and superior long-term stability. [4] Among various metal oxide semiconductors, such as Co 3 O 4 , [1d] ZnO [5] SnO 2 , [6] and CuO, [7] ZnO has been paid large attentions and widely studied as a gas sensing material, owing to simple synthesis, excellent chemical stability and high sensitivity.…”