Type

Journal Article

Authors

Inam Ul Ahad
Dermot Brabazon
Ibrahim Gaidan

Subjects

Physics

Topics
room temperature surface composition x ray diffraction gas sensor carbon black surface morphology temperature sensor high temperature

Response of a Zn₂TiO₄ Gas Sensor to Propanol at Room Temperature. (2017)

Abstract In this study, three different compositions of ZnO and TiO₂ powders were cold compressed and then heated at 1250 °C for five hours. The samples were ground to powder form. The powders were mixed with 5 wt % of polyvinyl butyral (PVB) as binder and 1.5 wt % carbon black and ethylene-glyco-lmono-butyl-ether as a solvent to form screen-printed pastes. The prepared pastes were screen printed on the top of alumina substrates containing arrays of three copper electrodes. The three fabricated sensors were tested to detect propanol at room temperature at two different concentration ranges. The first concentration range was from 500 to 3000 ppm while the second concentration range was from 2500 to 5000 ppm, with testing taking place in steps of 500 ppm. The response of the sensors was found to increase monotonically in response to the increment in the propanol concentration. The surface morphology and chemical composition of the prepared samples were characterized by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). The sensors displayed good sensitivity to propanol vapors at room temperature. Operation under room-temperature conditions make these sensors novel, as other metal oxide sensors operate only at high temperature.
Collections Ireland -> Dublin City University -> PubMed

Full list of authors on original publication

Inam Ul Ahad, Dermot Brabazon, Ibrahim Gaidan

Experts in our system

1
I.U. Ahad
Dublin City University
Total Publications: 4
 
2
Dermot Brabazon
Dublin City University
Total Publications: 162