| Autor: |
Naik, M. C., Bamane, S. R., Pakhare, K. S., Potdar, S. S., U.M.Patil |
| Předmět: |
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| Zdroj: |
Journal of Materials Science: Materials in Electronics; Jul2021, Vol. 32 Issue 14, p19925-19937, 13p |
| Abstrakt: |
Composite CeO2-Al2O3 have been successfully synthesized by a convenient solution combustion method. Nitrates of Ce and Al were taken along with fuel Glycine in proper stoichiometric proportion to synthesize C1, C2, C3, and C4. The obtained CeO2- Al2O3 nanocomposite was sintered at 750˚C temperature. The XRD patterns of samples confirm the development of CeO2-Al2O3 nanocomposite with the decrease in average crystallite size from 12.06 nm and 5.54 nm as estimated by the Debye–Scherrer formula. The detailed microanalysis showed that dislocation density and microstrain developed increases from C1 to C4. The SEM and TEM study depicts that, well-arranged porous network with pore size ranging between 4 and 12 nm was developed. The quantitative analysis of the samples was established by EDX analysis. Optical study of CeO2-Al2O3 estimate that band gap energy of the sample varies over the range of 2.50 eV to 2.90 eV. The gas sensing nature of CeO2-Al2O3 nanocomposite was thoroughly examined for NO2 under different operating temperatures and over a different range of concentrations. The maximum response of 156.6% is obtained for NO2 gas at an operating temperature of 2000C and 100 ppm gas concentration for sample C3. In addition, the quick response of 27 s was noted. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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