A gas-sensing array produced from screen-printed, zeolite-modified chromium titanate. (10th July 2015)

• Record Type: Journal Article
• Authors: Pugh, David C; Hailes, Stephen M V; Parkin, Ivan P
• Is Part Of: Measurement science & technology. Volume 26:Number 8(2015:Aug.)
• Publication Date: 2015-07-10
• Subjects: MOS -- CTO -- gas sensing -- SVM -- zeolite; Physical measurements -- Periodicals; Scientific apparatus and instruments -- Periodicals; Equipment and Supplies -- Periodicals; Science -- instrumentation -- Periodicals; Technology -- instrumentation -- Periodicals; Mesures physiques -- Périodiques; Physical measurements; Scientific apparatus and instruments; Periodicals; 502.87
• DOI: 10.1088/0957-0233/26/8/085102
• Languages: English
• ISSNs: 0957-0233

Abstract

Abstract: Metal oxide semiconducting (MOS) gas sensors represent a cheap, robust and sensitive technology for detecting volatile organic compounds. MOS sensors have consistently been shown to lack sensitivity to a broad range on analytes, leading to false positive errors. In this study an array of five chromium titanate (CTO) thick-film sensors were produced. These were modified by incorporating a range of zeolites, namely β, Y, mordenite and ZSM5, into the bulk sensor material. Sensors were exposed to three common reducing gases, namely acetone, ethanol and toluene, and a machine learning technique was applied to differentiate between the different gases. All sensors produced strong resistive responses (increases in resistance) and a support vector machine (SVM) was able to classify the data to a high degree of selectivity.