Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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H2 gas sensing characteristics of SnO2 nano-powdersprepared by homogeneous precipitation method

균일침전법을 이용한 SnO2 나노분말의 H2 감지 특성

  • Kim, Yeong-Bok (Department of Materials Science and Engineering, Chosun University) ;
  • Lee, Woon-Young (Department of Materials Science and Engineering, Chosun University) ;
  • Park, Jin-Seong (Department of Materials Science and Engineering, Chosun University)
  • 김영복 (조선대학교 신소재공학과) ;
  • 이운영 (조선대학교 신소재공학과) ;
  • 박진성 (조선대학교 신소재공학과)
  • Published : 2008.09.30
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Abstract

Nanosized $SnO_2$ particles were synthesized by homogeneous precipitation method using tin chloride ($SnCl_4{\cdot}5H_{2}O$) and urea ($CO(NH_2)_2$). The powders were heated at $500^{\circ}C$ and $600^{\circ}C$ for 2h. The crystal structure, microstructure, thermal behavior, specific surface area were analyzed using XRD, FE-SEM, TGA and BET, respectively. The initial resistance and the $H_2$ sensing properties were measured as a function of ${Sb_2}{O_3}$ and Pd doping concentrations. The resistance was decreased with the addition of ${Sb_2}{O_3}$ and the sensitivity for $H_2$ gas was increased with the addition of Pd. Thus, the optimum $H_2$ gas sensing property was obtained in the 0.25.mol% ${Sb_2}{O_3}$ and 1.w% added $SnO_2$ powders.

Keywords

References

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