TY - JOUR
T1 - Enhanced ethanol sensing response of nanostructured Ce-doped CuO thin films
AU - Bosigo, Romang
AU - Lepodise, Lucia M.
AU - Chimowa, George
AU - Muiva, Cosmas
N1 - Funding Information:
The authors gratefully acknowledge the financial support from the Botswana International University of Science and Technology Research Initiation Grant ( DVC/RDI/2/1/161(R00020) and SG00101 .
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/3/15
Y1 - 2022/3/15
N2 - CuO based thin films doped with Ce concentrations varying from 0 to 8 mol% were prepared by chemical spray pyrolysis. X-ray diffraction analysis revealed bandgap modulation which is dependant on Ce doping and also showed perservation of the single phased monoclinic CuO structure for all the films after doping indicating successful substitution of Ce4+ ions in host matrix. SEM and AFM microscopy showed changes in morphology as Ce doping was increased. And this appeared to have a significant role on the ethanol sensing capabilities of the thin films which were measured at different working temperatures. Good gas sensing stability and maximum response was observed for the 4% Ce thin film. The sensing device was found to be more responsive towards ethanol than other common volatile organic compounds such as methanol, acentronile, ammonia and acetone. The response and recovery times for the sensing suggest a chemosorbption mechanism.
AB - CuO based thin films doped with Ce concentrations varying from 0 to 8 mol% were prepared by chemical spray pyrolysis. X-ray diffraction analysis revealed bandgap modulation which is dependant on Ce doping and also showed perservation of the single phased monoclinic CuO structure for all the films after doping indicating successful substitution of Ce4+ ions in host matrix. SEM and AFM microscopy showed changes in morphology as Ce doping was increased. And this appeared to have a significant role on the ethanol sensing capabilities of the thin films which were measured at different working temperatures. Good gas sensing stability and maximum response was observed for the 4% Ce thin film. The sensing device was found to be more responsive towards ethanol than other common volatile organic compounds such as methanol, acentronile, ammonia and acetone. The response and recovery times for the sensing suggest a chemosorbption mechanism.
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U2 - 10.1016/j.matchemphys.2022.125841
DO - 10.1016/j.matchemphys.2022.125841
M3 - Article
AN - SCOPUS:85124579991
SN - 0254-0584
VL - 280
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 125841
ER -