Cu-substituted lanthanum ferrite perovskites: Preparation, characterization and photocatalytic activity in gas-solid regime under simulated solar light irradiation
| Autor: | Giuseppe Marcì, I. Natali Sora, Elisa I. García-López, Leonardo Palmisano, Valeria Felice, Lidia Armelao, Francesco Parrino |
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| Přispěvatelé: | Parrino, F., García-López, E., Marcì, G., Palmisano, L., Felice, V., Natali Sora, I., Armelao, L., Parrino, F, García-López, EI, Marcì, G, Palmisano, L, Felice, V, Natali Sora, I, Armelao, L |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials Chemistry2506 Metals and Alloys
Materials science Cu(II) substituted LaFeO3 LaFeO3 Perovskite Photocatalysis Scanning electron microscope Lanthanum ferrite perovskites photocatalysis solar irradiation Mineralogy chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences symbols.namesake Photocatalysi X-ray photoelectron spectroscopy Materials Chemistry Lanthanum Mechanics of Material Photocurrent Mechanical Engineering Metals and Alloys Mechanics of Materials 2506 021001 nanoscience & nanotechnology Copper 0104 chemical sciences chemistry symbols Diffuse reflection Settore CHIM/07 - Fondamenti Chimici Delle Tecnologie 0210 nano-technology Raman spectroscopy Nuclear chemistry |
| Zdroj: | Journal of alloys and compounds 682 (2016): 686–694. doi:10.1016/j.jallcom.2016.05.017 info:cnr-pdr/source/autori:Parrino F.; Garcia-Lopez E.; Marci G.; Palmisano L.; Felice V.; Sora I.N.; Armelao L./titolo:Cu-substituted lanthanum ferrite perovskites: Preparation, characterization and photocatalytic activity in gas-solid regime under simulated solar light irradiation/doi:10.1016%2Fj.jallcom.2016.05.017/rivista:Journal of alloys and compounds/anno:2016/pagina_da:686/pagina_a:694/intervallo_pagine:686–694/volume:682 |
| DOI: | 10.1016/j.jallcom.2016.05.017 |
| Popis: | Lanthanum orthoferrites LaFeO3 nanopowders doped with 20 mol% of Sr and 0-10-20 mol% of Cu were prepared by citrate auto-combustion synthesis and investigated in terms of crystal structure, morphology, surface area and optical properties by using several characterization techniques. The band gap energy values were found to range from 2.35 eV for LaFeO3 to 1.86 eV for the samples with the highest content of copper, this trend reflects the decrease of the particle size. All powders showed photocurrent response, the highest photocurrent was obtained for undoped orthoferrite calcined at 600°C. Their physical-chemical properties were related to photoelectrochemical behaviour. The the position of the quasi Fermi level of electrons for all the photocatalysts calcined in the range 600 - 980°C is about the same within experimental error (between -0.62 and -0.67 V). Doping with 20 mol% of strontium does not influence the flat band potential of the powders, while doping with copper caused an important and reproducible change in the titration curve, indicating the presence of intermediate energy states in the samples calcined at 600°C, but not in those calcined at 980°C. |
| Databáze: | OpenAIRE |
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