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Development of a Detection Sensor for Lethal H2S Gas

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The gas which may be lethal to human body with short-term exposure in common industrial fields.or workplaces in LAB may paralyze the olfactory sense and impose severe damages to central.nervous system and lung. This study is concerned with the gas sensor which allows avoid the toxic gas that may be generated in the space with residues of organic wastes under.50 °C or above. This study investigates response and selectivity of the sensor to hydrogen sulfide.gas with operating temperatures and catalysts. The thick-film semiconductor sensor for hydrogen.sulfide gas detection was fabricated WO3/SnO2 prepared by sol–gel and precipitation methods. The.nanosized SnO2 powder mixed with the various metal oxides (WO3, TiO2, and ZnO) and doped.with transition metals (Au, Ru, Pd Ag and In). Particle sizes, specific surface areas and phases of.sensor materials were investigated by SEM, BET and XRD analyses. The metal-WO3/SnO2 thick.films were prepared by screen-printing method. The measured response to hydrogen sulfide gas is.defined as the ratio (R a/R g) of the resistance of WO3/SnO2 film in air to the resistance of WO3/ in a hydrogen sulfide gas. It was shown that the highest response and selectivity of the sensor.for hydrogen sulfide by doping with 1 wt% Ru and 10 wt% WO3 to SnO2 at the optimum operating.temperature of 200 °C.
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Document Type: Research Article

Publication date: 2012-07-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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