Selective Response of Ag₆Mo₁₀O₃₃ Thick Film toward Ammonia Using AC Measurement

Abstract

Deployment of impedance methodology for selective sensing of ammonia by silver decamolybdate is demonstrated. Using AC impedance, interaction behavior of Ag 6 Mo 10 O 33 thick film towards ammonia, hydrogen and petroleum gas at 573 K and 623 K was studied. The thick film exhibited selective response down to 5 ppm of NH 3 at 623 K at frequency of 14 kHz. This method is found to be superior to the conventional dc based methodology.

Metal-oxide gas sensors for exhaled-breath analysis: a review

“…This indicates that dielectric excitation yielded linear properties under various humidity conditions (figure9(k)) and that the real part of the response at 2.7 MHz was not influenced by temperature (figure 9(l)). Such an approach to AC measurement would provide reasonable imaginary-part data and improve the sensitivity and/or selectivity Prabhu et al (2019). studied the responses of DC and AC measurements made with an Ag 6 Mo 10 O 33 gas sensor to NH 3 gas, as shown in figure10.…”

Effect of Au-Modification of CeVO4 Sensing Electrode on NH3 Sensing Properties for Potentiometric Sensor

“…The resistance gas sensor has a disadvantage of poor selectivity 8,9 and is not suitable for the exhaust monitoring. 10,11 As a kind of electrochemical sensor, potentiometric sensor based on YSZ solidstate electrolyte and metal oxide electrode has gradually occupied the research focus of exhaust gas sensors in recent years, which is mainly due to its high operating temperature, durability and outstanding sensitivity in the harsh exhaust environment.…”