MoO₃:In₂O₃ binary oxide thin films as CO gas sensor
by Nimba B. Kothawade; Vikas V. Deshmane; Arun V. Patil
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 15, No. 3, 2020

Abstract: The aim of the study was to understand gas sensing properties of thin films of molybdenum trioxide and indium oxide (MoO₃-In₂O₃) indifferent normality proportions. Thin films were prepared by spray pyrolysis technique on glass substrates at 400°C. The films were characterised using X-ray diffraction, scanning electron microscope and energy dispersive analysis by X-ray spectra. The electrical and gas sensing properties of the films were studied using static gas sensing apparatus. The resistivity of films increased by adding MoO₃ as the dopant in In₂O₃. The maximum resistivity of film was found 1.75 × 10⁴ Ωm for 0.3N (MoO₃) and 0.1N (In₂O₃) binary oxide films. The films were tested against five different target gases. The composition ratio 0.3N:0.1N films showed the 70.50% sensitivity for 300 ppm CO gas at 150°C. The response time (15s) and recovery time (25s) was found to be quick.

Online publication date: Thu, 22-Oct-2020

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Microstructure and Materials Properties (IJMMP):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com