Speaker
Ms
Mahlatse Manamela
(University of Limpopo)
Description
The undoped, 5 % (In or Co) single and (In and Co) double doped ZnO nanoparticles have been successfully synthesised using the ball milling technique. The kenosistec station equipment was used to probe the sensing properties of the doped and undoped ZnO nanoparticles to H2S gas. The current versus time curves plotted for H2S gas, show that the undoped dominates sensitivity followed by the double doped ZnO nanoparticles. Single doped nanoparticles show poor sensitivity to H2S gas. The undoped ZnO nanoparticles acquire optimum sensitivity at a concentration of 20 ppm in the temperature 300 oC. For the double doped ZnO nanoparticles, the optimum sensitivity is observed at 5 -10 ppm concentration at a temperature range of 200-350 oC. The double doped ZnO nanoparticles show fast response, while Co doped ZnO nanparticles show fast recovery time to H2S gas.
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Primary author
Ms
Mahlatse Manamela
(University of Limpopo)
Co-authors
Dr
Bonex Mwakikunga
(CSIR National Laser Centre)
Dr
Thuto Mosuang
(University of Limpopo)
