CO2 Sensing Properties of SnO2-Cr2O3 Composite Nanofibers Via Electrospinning Method
전기방사법으로 합성된 SnO2-Cr2O3 복합나노섬유의 이산화탄소 가스감응 특성
이재형;김재훈;김진영;김상섭;
Lee, Jae-Hyoung;Kim, Jae-Hun;Kim, Jin-Young;Kim, Sang Sub;
인하대학교 신소재공학과;
Department of Materials Science & Engineering, Inha University;
DOI : 10.5695/JKISE.2017.50.4.289
Detection of $CO_2$ gas in both indoor and outdoor atmospheres is now becoming an important issue because of greenhouse effect and climate crisis. In this study, gas sensors based on $SnO_2-Cr_2O_3$ composite nanofibers were fabricated by the electrospinning method to detect $CO_2$ gas. The gas sensors showed a response to ppm level of $CO_2$ gas from room temperature to $200^{circ}C$ while the highest response was observed at $150^{circ}C$. The gas response is enhanced by the catalytic property of $Cr_2O_3$. Selective $CO_2$ detection is obtained through the chemical reaction of $Cr_2O_3$ to chromium carbonate. All the results suggest the $SnO_2-Cr_2O_3$ composite material is promising for the use of $CO_2$ gas sensors.
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