Facile synthesis of Fe3+ doped La2CuO4/LaFeO3 perovskite nanocomposites: Structural, optical, magnetic and catalytic properties
| Autor: | M. Sukumar, J. Judith Vijaya, B. Al-Najar, L. John Kennedy, M. Bououdina |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Nanocomposite Materials science Band gap Mechanical Engineering Doping 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences law.invention Paramagnetism Chemical engineering Mechanics of Materials law 0103 physical sciences General Materials Science Orthorhombic crystal system Crystallite Crystallization 0210 nano-technology Perovskite (structure) |
| Zdroj: | Materials Science in Semiconductor Processing. 100:225-235 |
| ISSN: | 1369-8001 |
| DOI: | 10.1016/j.mssp.2019.04.049 |
| Popis: | La2CuO4/LaFeO3 perovskite nanocomposites were prepared using a microwave combustion technique. The structural characterization by XRD and Rietveld refinements confirmed that Fe3+ substitution in La2CuO4 (LFC) induced the crystallization of secondary LaFeO3 phase. The orthorhombic/cubic nanostructured composites exhibited an average crystallite size in the range 37–47 nm and 14–39 nm, respectively. FTIR spectra revealed bands at 517, 683, and 561 cm−1, characteristics of perovskites orthorhombic and cubic stretching modes. With the increase in Fe3+ doping concentration, the optical band gap increased gradually. Surface morphology showed nanosized crystalline grains agglomerated with spherical and non-spherical shapes. The doping dependence of the magnetisation indicated magnetic transition from ferromagnetic to the paramagnetic state at room temperature. The bifunctional nanocomposites La2CuO4/LaFeO3 exhibited excellent catalytic performance and better conversion efficiency (conversion 100% and selectivity 98.6%) for glycerol. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect