Effect of Co doping on chemosorbed oxygen accumulation and gas response of SnO2 under dynamic program cooling

Investigation on acceptor–donor co-doped SnO2 nanoparticles enriched with oxygen vacancies: a capacitive humidity sensor for respiration detection

“…In general, Al defects and Si defects can act as acceptors and donors, respectively, and they interact with each other through complex mechanisms. 30 Li et al reported that co-doping Mo and C can effectively shift the valence band edge while leaving the conduction band edge nearly unaffected. 31 As shown in Fig.…”

High-Selectivity Laminated Gas Sensor Based on Characteristic Peak under Temperature Modulation

“…Usually, the gas-sensitive response is the ratio of the resistance under air to the resistance under atmosphere, i.e., R air / R gas . To unify the calculation results, the gas-sensitive response is defined as follows S G = R ( normalg normala normals , C , 150 ° C ) − 1 R ( normala normali normalr , C , 150 ° C ) − 1 = R ( normala normali normalr , C , 150 ° C ) R ( normalg normala normals , C , 150 ° C ) where R (air,C,150 °C) represents the resistance value of the sensor when cooling from 400 to 150 °C in an air atmosphere and R (air,C,150 °C) –1 represents the reciprocal of this resistance value. The middle letter “C″ represents cooling, and similarly, “H″ in the formula below represents heating.…”

“…Usually, the gassensitive response is the ratio of the resistance under air to the resistance under atmosphere, i.e., R air /R gas . To unify the calculation results, the gas-sensitive response is defined as follows 39…”

Formaldehyde gas sensor with extremely high response employing cobalt-doped SnO2 ultrafine nanoparticles

“…Therefore, researchers are committed to improving sensor performance through various methods. Noble metal functionalization, 14 constructing heterojunctions 15 and element doping 16 can usually improve the gas sensing performance of the sensor. Noteworthy, doping with metal impurities is one of the most effective ways to increase surface crystal lattice defect and oxygen vacancies, which could to improve the gas sensing properties.…”