کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
745073 | 894413 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Improved NH3, C2H5OH, and CH3COCH3 sensing properties of SnO2 nanofibers by adding block copolymer P123 Improved NH3, C2H5OH, and CH3COCH3 sensing properties of SnO2 nanofibers by adding block copolymer P123](/preview/png/745073.png)
SnO2 nanofibers with and without block copolymer P123 (EO20PO70EO20) in the precursor are synthesized via a simple electrospinning method. The Brunauer–Emmett–Teller surface areas of the nanofibers with and without P123 are 113.261 and 18.025 m2 g−1, respectively. Gas sensing properties of these two samples are investigated by exposing the corresponding sensors to NH3, C2H5OH, and CH3COCH3 at 280, 300, and 340 °C, respectively. Comparing with nanofibers without P123, the SnO2 nanofibers with P123 hold enhanced response value, higher saturated-detection-concentration, and lower minimum-detection-limit. The response is 59, 75, and 65 for nanofibers with P123 to 500 ppm NH3, C2H5OH, and CH3COCH3, respectively, and is 28, 50, and 43 for nanofibers without P123. The minimum-detection-limit is 5, 1, and 1 ppm for nanofibers with P123 to detect NH3, C2H5OH, and CH3COCH3, respectively, and is 50, 20, and 10 ppm for nanofibers without P123. The improved gas sensing properties are based on their coarse and loose morphology and higher Brunauer–Emmett–Teller surface area brought by adding P123.
Journal: Sensors and Actuators B: Chemical - Volume 141, Issue 1, 18 August 2009, Pages 174–178