The CO gas sensing properties of direct-patternable SnO₂ films containing graphene or Ag nanoparticles

Abstract

The CO gas sensing properties of direct-patternable SnO2 composite thin films were more effectively improved by the incorporation of Ag nanoparticles than graphene.

Carbon Monoxide Sensing Technologies for Next-Generation Cyber-Physical Systems

“…Kim et al [ 72 ] explored improvements of photochemically fabricated SnO 2 thin film by using graphene (G) and silver (Ag) nanoparticles. After annealing at 500 °C, SnO 2 thin films were prepared with 0.0055 wt.% and 0.05 wt.% nanoparticle concentrations of Ag and graphene, respectively.…”

Porous organic polymers based on cobalt corroles for carbon monoxide binding

“…Most of the commercial CO detectors are based on electrochemical cells 11 or semiconducting metal oxides such as SnO 2 and ZnO, [12][13][14] However these sensors operate at high temperatures and suffer from relatively poor selectivity, due to gaseous interference from other common pollutants including humidity, NOx, NH 3 , SO 2 , and H 2 S. [15][16][17][18][19] Hence, some progress is still to be gained for the development of efficient CO sensors. One crucial point consists to find molecules or metal complexes able to selectively bind CO with a high affinity.…”

Mesoporous In2O3 nanocrystals: synthesis, characterization and NOx gas sensor at room temperature

“…In 2 O 3 , as an important n-type semiconductor with a wide band gap of B3.6 eV, exhibits promising electronic and optical properties. [7][8][9] In particular, In 2 O 3 has been extensively applied in gas sensing, and the sensors based on In 2 O 3 exhibit good performance in NO x 10 detection, as well as in detecting toxic gases such as NH 3 , 11 O 3 12 and CO. 13 In recent years, In 2 O 3 nanostructures with various morphologies and sizes have been developed, such as nanotubes, 14 nanoflowers, 15 nanotowers 16 and so on. In 2 O 3 gas sensors with porous structure are particularly suitable for gas adsorption and diffusion, due to their large surface-to-volume ratio at the nanoscale level which allows quick diffusion of gas molecules, rendering them promising for the detection of low concentrations of target gases.…”