Abstract
Acetaldehyde gas sensing properties of SnO2 loaded with different amounts of Rh or different kinds of metal oxides have been investigated. The addition of 1.5wt% Rh resulted in a slight enhancement in sensitivity. Among the metal oxides tested, only La2O3 promoted the sensitivity. The sensitization effect of Rh was promoted markedly by the simultaneous addition of La2O3. Among the sensors tested, SnO2 loaded with 1.0wt% La2O3 and 1.5wt% Rh exhibited the highest sensitivity at 300°C.
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