CuO catalytic membrane as selectivity trimmer for metal oxide gas sensors

✍ Scribed by M Frietsch; F Zudock; J Goschnick; M Bruns

• Book ID: 108471121
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 164 KB
• Volume: 65
• Category: Article
• ISSN: 0925-4005
• DOI: 10.1016/s0925-4005(99)00353-6

✦ Synopsis

Gas sensors based on semiconducting metal oxides were coated with catalytic membranes to improve the selectivity of gas detection. CuO was used to establish a catalytic membrane to develop an active gas filter. The coated gas sensors were tested for their gas-detecting properties by exposure to model gas atmospheres. The catalytic effect of the membranes was examined by analyzing the composition of the gas atmosphere with an FT-IR spectrometer during exposure. To test the discrimination power, eight sensors with and without coating were combined in an array which was exposed to a mixture of two gases. A good selectivity was demonstrated using principal component Ž . analysis PCA .