4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

The Effect of Annealing Temperature on the Sensitivity and Selectivity of TiO<sub>2</sub> base Gas Sensors

5 Jul 2016, 16:10
1h 50m
Kramer Law building

Kramer Law building

UCT Middle Campus Cape Town
Board: A.414
Poster Presentation Track A - Division for Physics of Condensed Matter and Materials Poster Session (1)

Speaker

Ms Zamaswazi Tshabalala (CSIR and UFS)

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

In this study we report on the effect of annealing temperature on the TiO2 nanostructure based chemoresistive gas sensors synthesized using microwave assisted hydrothermal treatment. The sensing response, structural, optical and magnetic properties were carried out using various analytical techniques. The X-ray diffraction, Raman and transmission electron microscope displayed an increase in rutile (110) and (101) peaks at 700 °C annealing temperature. The scanning electron microscope revealed that the web of nanotubes transforms to short nanorod like structures at 700 °C. Photoluminescence analysis showed an increase in band edge and a decrease in oxygen vacancies concentration as the annealing temperature increases. The electron paramagnetic resonance displayed room temperature ferromagnetism due to the presence of Ti4+- O2- and Ti3+ radicals on the surface and lattice respectively. We observed a decrease in a sensing response as the annealing temperature increases.

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Main supervisor (name and email)<br>and his / her institution

David Motaung DMotaung@csir.co.za

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Primary author

Ms Zamaswazi Tshabalala (CSIR and UFS)

Co-authors

Dr David Motaung (CSIR) Ms Gugu Mhlongo (CSIR/UFS) Prof. Martin Mtwaeaborwa (UFS)

Presentation Materials

There are no materials yet.