The Enhanced H₂S Sensing Behavior of Ag-Doped Porous SnO₂ Nanopowders Prepared by Template Method

Abstract:

Ag-doped porous SnO₂ nanopowders were synthesized via a facile glucan-assisted template method combined with subsequent calcinations. Morphology, crystal structure, and H₂S gas sensing properties of pure and Ag-doped porous SnO₂ nanopowders were investigated. In comparison with undoped SnO₂ nanopowders, the Ag-doped porous SnO₂ nanopowders demonstrated enhanced H₂S sensing behavior with high sensitivity, short response and recovery time, relatively low response concentration of 50 ppm, and good selectivity. The dramatic improvement in H₂S gas sensing characteristics was explained in terms of rapid gas diffusion onto the entire sensing surface due to the less-agglomerated and porous structure of SnO₂ nanopowders and the catalytic effect of doped-Ag element. The main objective of this research is to develop a new method to introduce catalysts on gas-sensing materials with less-agglomerated and porous structure.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 337-340
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.337
• Online since: July 2011
• Authors: Chao Li, Hai Yan Xue, You Qi Zhu, Yu Ting Wang
• Keywords: Doping, Gas-Sensing, Porous, SnO₂ Nanopowders

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