Synthesis of Porous Network-Like α-Fe2O3 and α/γ-Fe2O3 Nanoparticles and Investigation of Their Photocatalytic Properties
| Autor: | Ehsan Fathi, Mahdi Ghasemifard, Misagh Ghamari, M. Izi, G. Heidari |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Engineering Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Porous network 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Chemical engineering law Photocatalysis General Materials Science Calcination 0210 nano-technology Electronic band structure Porosity Methylene blue Magnetite |
| Zdroj: | Nanotechnologies in Russia. 14:353-361 |
| ISSN: | 1995-0799 1995-0780 |
| DOI: | 10.1134/s1995078019040062 |
| Popis: | In this study, porous network-like α-Fe2O3 and α/γ-Fe2O3 nanoparticles (NPs) were synthesized by auto-combustion method and their photocatalytic performance was evaluated using methylene blue (MB) as a dye model. Calcination of the synthesized nanoparticles resulted in α/γ-Fe2O3 heterophase magnetite material at 450°С and pure α-Fe2O3 at 700 and 800°С. The magnetic property of α/γ-Fe2O3 makes the photocatalyst to be easily collected from the photocatalytic system and increases its potential in industrial applications. The α/γ-Fe2O3 heterophase material showed a photocatalytic performance almost similar to that of the α-Fe2O3 NPs calcined at 800°С, but higher than that of the α-Fe2O3 NPs calcined at 700°С. The cliff-like band structure between α-Fe2O3 and γ-Fe2O3 reduced recombination of photoelectrons and photoholes, thereby improving photocatalytic performance of the α/γ-Fe2O3 heterophase material. |
| Databáze: | OpenAIRE |
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