Author/Authors :
Hong، نويسنده , , Dae Ung and Han، نويسنده , , Chi-Hwan and Park، نويسنده , , Sang Hyun and Kim، نويسنده , , Il-Jin and Gwak، نويسنده , , Jihye and Han، نويسنده , , Sang-Do and Kim، نويسنده , , Hyun Jae، نويسنده ,
Abstract :
Recovery properties after H2S catalytic poisoning of catalytic-type gas sensor with photo-catalysts and UV radiation have been examined. Each sensing material of the sensor consists of Pd, Pt supported on γ-Al2O3 and Pd/titanate, Pt/titanate nanotubes or TiO2 particles. Pd/titanate and Pt/titanate nanotubes photo-catalyst were synthesized by hydrothermal synthesis method. All the sensors were deactivated after 500 ppm H2S exposure for 20 h. The sensors with Pd/titanate or Pt/titanate nanotubes showed regenerated voltage response under UV radiation. However the sensor with TiO2 particles showed negligible regenerated voltage response. Regenerated voltage response with Pd/titanate or Pt/titanate nanotubes may stem from location of Pd or Pt catalyst on the titanate nanotube photo-catalyst.
Keywords :
Catalytic poisoning , H2S , Titanate nanotubes , H2 sensor , Photo-catalyst
