کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1555972 | 999164 | 2015 | 5 صفحه PDF | دانلود رایگان |
Graphene (G) was prepared by reducing graphene oxide (GO) with hydrazine hydrate. SnO–graphene composites with different amounts of graphene were prepared via hydrothermal method. SnO–G composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The effects of the graphene content in the composites and the hydrothermal temperature on the gas-sensing responses of the materials to formaldehyde vapor were investigated. The gas-sensing selectivity of the sensor based on SnO–1% G (100 °C, 10 h) composite to five kinds of gases (1000 × 10−6) was also studied. The results revealed that the sensor based on SnO–1% G (100 °C, 10 h) exhibited high response to formaldehyde vapor when the operating temperature of the sensor was 133 °C and the response to 0.001 × 10−6 formaldehyde attained 3.9. The response time and recovery time for 0.001 × 10−6 formaldehyde were 24 and 12 s, respectively.
Journal: Journal of Materials Science & Technology - Volume 31, Issue 9, September 2015, Pages 913–917