The Effects of the Location of Au Additives on Combustion-generated SnO2 Nanopowders for CO Gas Sensing

Sensors

Smitesh D. Bakrania¹ 

[1] Department of Mechanical Engineering, Rowan University / 201 Mullica Hill Road, Glassboro, NJ 08028, USA

关键词: SnO₂;    gas sensor;    additives;    gold;    combustion synthesis;   

DOI  :  10.3390/s100707002

来源: mdpi

【 摘 要 】

The current work presents the results of an experimental study of the effects of the location of gold additives on the performance of combustion-generated tin dioxide (SnO₂) nanopowders in solid state gas sensors. The time response and sensor response to 500 ppm carbon monoxide is reported for a range of gold additive/SnO₂ film architectures including the use of colloidal, sputtered, and combustion-generated Au additives. The opportunities afforded by combustion synthesis to affect the SnO₂/additive morphology are demonstrated. The best sensor performance in terms of sensor response (S) and time response (τ) was observed when the Au additives were restricted to the outermost layer of the gas-sensing film. Further improvement was observed in the sensor response and time response when the Au additives were dispersed throughout the outermost layer of the film, where S = 11.3 and τ = 51 s, as opposed to Au localized at the surface, where S = 6.1 and τ = 60 s.

【 授权许可】

CC BY   
© 2010 by the authors licensee MDPI, Basel, Switzerland.