Synthesis of Mesoporous Tin Oxide and Its Application as a Gas Sensor

메조세공을 갖는 이산화 주석의 합성 및 가스센서로서의 응용

  • Kim, Nam-Hyon (Department of Chemical Engineering, Inha University) ;
  • Kim, Geon-Joong (Department of Chemical Engineering, Inha University)
  • 김남현 (인하대학교 생명화학공학부) ;
  • 김건중 (인하대학교 생명화학공학부)
  • Received : 2007.01.17
  • Accepted : 2007.02.22
  • Published : 2007.04.10

Abstract

In this study, mesoporous tin oxide was synthesized by sol-gel method using $C_{16}TMABr$ surfactant as a template in a basic condition. The optimum conditions for the synthesis of mesoporous $SnO_2$ were investigated and the obtained samples were characterized by XRD, nitrogen adsorption and TEM analysis. A mesoporous and nanostructured $SnO_2$ gas sensor with Au electrode and Pt heater has been fabricated on alumina substrate as one unit via a screen printing process. Sensing abilities of fabricated sensors were examined for CO and $CH_4$ gases, respectively, at $350^{\circ}C$ in the concentration range of 1~10,000 ppm. Influence of loading amount of palladium impregnated on $SnO_2$ was also tested in detection of those gases. High sensitivity to detecting gases and the fast response speed with stability were obtained with the mesoporous tin oxide sensor as compared to a non-porous one under the same detection conditions.

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