Abstract
SnO2-graphene nanocomposite thick films have been successfully synthesized using polyol method. Reflux with ethylene glycol as medium was employed to produce the nanocomposite. Crystal structure characterization using X-Ray diffraction shows the nanocomposites have good crystalinity without any impurity. Scanning electron microscopy and transmission electron microscopy characterization results show SnO2 has spherical shape and well distributed on the graphene layer. The size of SnO2 particles is around 5–8 nm. To confirm the improvement effect of grapheme addition to SnO2, sensor testing was conducted toward 30 ppm carbon monoxide (CO) gas at 150 °C compared with pure SnO2 and pure graphene. The sensor responses are 88.11%, 52.84%, and 0.93%, respectively.
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