Abstract:
Research on semiconducting metal oxide (MO) nanostructures is a fascinating field that has
received massive interest due to their significant physical and chemical properties which can
be useful in the development of highly efficient nanodevices. Incorporating impurities such
as metal elements into the MO matrix offers tailored properties for various applications.
Doped MO nanostructures exhibit modified structural, optical, electrical and morphological
properties rendering them useful for fabricating high-performance devices. This study
focuses on the synthesis of Cerium-Copper Oxide (Ce/CuO) nanopowders and thin films
using simple hydrothermal and spray pyrolysis methods that are both inexpensive and eco friendly. Characterization techniques including X-ray diffraction (XRD), Raman spectroscopy,
Fourier Transform Infrared spectroscopy (FTIR), Ultraviolet-Visible spectroscopy (Uv-Vis),
Scanning Electron microscopy (SEM), Energy dispersive spectroscopy (EDX), Atomic force
microscopy (AFM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET)
and two-point probe method were employed to gauge the characteristics of the synthesized
samples. XRD analysis revealed formation of monoclinic phase of CuO with decreasing
crystallinity of the samples as the Ce content increased. Analysis with EDX detected Cu, Ce,
and O in the samples. A Raman peak corresponding to the CeO2 phase was identified at
higher Ce doping levels. SEM imaging revealed that Ce incorporation induces changes in
nanostructure morphology. The optical bandgap (Eg) depicted a blue shift as the Ce content
increased in the samples. The Ce/CuO samples exhibited enhanced temperature-controlled
DC conductivity with the 4% Ce sample showing the lowest activation energy, lowest Tmax
and consequently the maximum conductivity peaking at a temperature of 503K. Ethanol
sensing capabilities of Ce/CuO thin films were measured at different ethanol concentrations
and working temperatures. Good stability and maximum response were observed for the
4 % Ce thin film. The sensor exhibited greater response to ethanol compared to methanol,
acetone, acentronile, and ammonia. These results suggest that the Ce/CuO is a promising
ethanol gas detector, with the Ce dopant playing a significant role in improving the electrical
and sensing properties of CuO.
Romang, B (2024). Temperature dependent electrical and gas sensing properties of ce/cuo nanostructures. Afribary. Retrieved from https://tracking.afribary.com/works/temperature-dependent-electrical-and-gas-sensing-properties-of-ce-cuo-nanostructures
Romang, Bosigo "Temperature dependent electrical and gas sensing properties of ce/cuo nanostructures" Afribary. Afribary, 30 Mar. 2024, https://tracking.afribary.com/works/temperature-dependent-electrical-and-gas-sensing-properties-of-ce-cuo-nanostructures. Accessed 21 Nov. 2024.
Romang, Bosigo . "Temperature dependent electrical and gas sensing properties of ce/cuo nanostructures". Afribary, Afribary, 30 Mar. 2024. Web. 21 Nov. 2024. < https://tracking.afribary.com/works/temperature-dependent-electrical-and-gas-sensing-properties-of-ce-cuo-nanostructures >.
Romang, Bosigo . "Temperature dependent electrical and gas sensing properties of ce/cuo nanostructures" Afribary (2024). Accessed November 21, 2024. https://tracking.afribary.com/works/temperature-dependent-electrical-and-gas-sensing-properties-of-ce-cuo-nanostructures