Highly sensitive H2 sensor based on PdO-decorated WO3 nanospindle p-n heterostructure

Hierarchically porous PdO-functionalized SnO2 nano-architectures for exclusively selective, sensitive, and fast detection of exhaled hydrogen

“…This is in line with previously reported study ndings by Tsang et al 41 demonstrating the Pd-induced spill-over reaction of H atoms on the SnO 2 surface using temperature-programmed desorption and reduction, and further supporting the idea that PdO catalysts improve the hydrogen-sensing performance of various oxide-based chemiresistors, such as In 2 O 3 , WO 3 , ZnO, and NiO. [66][67][68][69] Furthermore, p- This journal is © The Royal Society of Chemistry 2023 type PdO can decrease the background charge carrier concentrations of n-type SnO 2 through the formation of nanoscale p-n heterojunctions (i.e., electronic sensitization). [42][43][44]70 Indeed, as demonstrated in Fig.…”

Ultrasensitive Chemiresistive Gas Sensor Can Diagnose Asthma and Monitor Its Severity by Analyzing Its Biomarker H2S: An Experimental, Clinical, and Theoretical Study

“…The response time and recovery time are defined as the time required for the resistance variation of 90% in the response and recovery phases, respectively. The details of the sensing performance test with the static mode are similar to those in our previous work , and have been shown in the Supporting Information of 3.2. Figure b exhibits how the sensor was tested with the dynamic mode.…”

Fabrication and Computational Study of a Chemiresistive NO2 Gas Sensor Based on the Carbon Dots-WO3 Heterostructure for Operating below Room Temperature

“…The presence of the CC peak indicates that the Cdots are made of a graphitic structure, whereas the C–O and CO peaks suggest that the Cdots have adsorbed oxygen on the surface. According to analyses shown in 1.0 Section in the Supporting Information, the tungsten element belongs to W 6+ of WO 3 , , and there are lattice oxygen and surface oxygen vacancy defects , on the surface of the sample.…”

“…Therefore, developing high-performance sensors to accurately and rapidly detect NO 2 is essentially important. With the superiorities of small size, high sensitivity, low cost, and chemical stability, metal oxide semiconductors (MOSs)-based gas sensors have attracted much attention. , However, most of the MOSs-based gas sensors are always struggling with their high operating temperature, which consumes too much power, impeding their application in mobile devices and leading to their long-term instability by degrading their structures or chemical compositions. , Therefore, high-performance NO 2 gas sensors which can work in any environment that is not only at room temperature but also in extreme conditions such as cold environments below 0 °C should be developed.…”