UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Hydrocarbon detection with metal oxide semiconducting gas sensors modified by overlayer or admixture of zeolites Na-A, H-Y and H-ZSM-5

Hernandez, PT; Hailes, SMV; Parkin, IP; (2017) Hydrocarbon detection with metal oxide semiconducting gas sensors modified by overlayer or admixture of zeolites Na-A, H-Y and H-ZSM-5. Sensors and Actuators B: Chemical , 242 pp. 1281-1295. 10.1016/j.snb.2016.09.006. Green open access

[img]
Preview
Text
Hydrocarbon Detection with Metal Oxide Semiconducting Gas Sensors Modified by Overlayer or Admixture of Zeolites Na.pdf - ["content_typename_Accepted version" not defined]

Download (2MB) | Preview

Abstract

A control thick-film SnO2 gas sensor was modified with zeolites holding LTA, FAU and MFI frameworks using two different approaches to integrate them into the gas-sensing interface. The objective was to prompt selectivity and sensitivity enhancements that were otherwise unattained with the unmodified material when detecting a range of hydrocarbon vapours with similar molecular structures and kinetic diameters. Molecules with different functional groups were also explored. Overlayers were designed by screen-printing 1 or 3 zeolite depositions on top of the control sensor. Admixtures were prepared by screen-printing composites of the control material with 10% (w/w) and 30% (w/w) of zeolite. Tests were performed against ethane, propane, butane, ethanol, isopropanol, acetone, toluene and carbon monoxide at concentrations in the 2.5–125 ppm range and sensors were heated to temperatures in the 250–500 °C range. Sensors were also exposed to humid air and to a mixture of ethane and humid air to assess the selective capabilities of the sensing materials in mixed-gas environments. Both fabrication methods provided sensor responses that, combined, favoured vapour discrimination in a way unachievable with the control sensor and the presence of zeolite was seen to assist in sensitivity and selectivity enhancements towards vapours, whilst providing stable and repeatable responses over time.

Type: Article
Title: Hydrocarbon detection with metal oxide semiconducting gas sensors modified by overlayer or admixture of zeolites Na-A, H-Y and H-ZSM-5
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.snb.2016.09.006
Publisher version: http://doi.org/10.1016/j.snb.2016.09.006
Language: English
Additional information: © 2016 Published by Elsevier B.V. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Technology, Chemistry, Analytical, Electrochemistry, Instruments & Instrumentation, Chemistry, MOS gas sensor arrays, Zeolite modification, SELECTIVITY ENHANCEMENT, FILMS, THICK, DIOXIDE, MARKERS, OZONE, PART
URI: http://discovery.ucl.ac.uk/id/eprint/10045165
Downloads since deposit
11Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item