화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.26, No.12, 741-750, December, 2016
DOI10.3740/MRSK.2016.26.12.741  Export Citation
Excellent Carbon Monoxide Sensing Performance of Au-Decorated SnO2 Nanofibers
Jae-Hun Kim, Yifang Zheng, Ali Mirzaei1, and Sang Sub Kim†
  • Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea
  • 1The Research Institute of Industrial Science, Hanyang University, Seoul 04763, Republic of Korea
E-mail:
Nanofibers(NFs), because of their high surface area and nanosized grains, have appropriate morphologies for use in chemiresistive-type sensors for gas detection applications. In this study, a highly sensitive and selective CO gas sensing material based on Au-decorated SnO2 NFs was fabricated by electrospinning. SnO2 NFs were synthesized by electrospinning and subsequently decorated with various amounts of Au nanoparticles(NPs) by sputtering; this was followed by thermal annealing. Different characterizations showed the successful formation of Au-decorated SnO2 NFs. Gas sensing tests were performed on the fabricated sensors, which showed bell-shaped sensing behavior with respect to the amount of Au decoration. The best CO sensing performance, with a response of ~20 for 10 ppm CO, was obtained at an optimized amount of Au (2.6 at.%). The interplay between Au and SnO2 in terms of the electronic and chemical sensitization by Au NPs is responsible for the great improvement in the CO sensing capability of pure SnO2 NFs, suggesting that Au-decorated SnO2 NFs can be a promising material for fabricating highly sensitive and selective chemiresistive-type CO gas sensors.
Keywords:carbon monoxide;Au functionalization;SnO2 nanofiber;electrospinning;gas sensor
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