Ultra Fast Hematite Preparation using a Microwave-Assisted Hydrothermal Method

Author(s): Arnayra Sonayra de Brito Silva, Jefferson Maul de Andrade, Graziela Pereira Casali, Severino Jackson Guedes de Lima, Elson Longo, Ary da Silva Maia, Dawy Keyson, Antonio Gouveia de Souza, Iêda Maria Garcia dos Santos

Journal Name: Current Physical Chemistry

Volume 3 , Issue 4 , 2013

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Nanostructured iron (III) oxide (α-Fe2O3) was synthesized using Fe(NO3)3, PEG and different bases (NaOH and NH4OH) as precursors via hydrothermal microwave method. Several experimental techniques were employed to formulate an optic-structural model. The results proved the efficient synthesis of α-Fe2O3 and demonstrated that the material’s behavior could be tuned using different conditions in the reaction. Ultra fast synthesis (1 min) of α-Fe2O3 was obtained when NH4OH was used as the alkalinizing agent. Evaluating the short- and long-range order before and after microwave heating was possible. PEG and the alkalinizing agent fundamentally influenced the material morphology; three different particle shapes were observed: hexagons (NaOH with PEG), rods (NaOH without PEG) and spheres (NH4OH with PEG).

Keywords: α-Fe2O3, ammonia, hematite, field emission scanning electronic microscopy, infrared spectroscopy, iron (III) oxide, microwave-assisted hydrothermal methods, morphology, PEG, sodium hydroxide, Raman spectroscopy, UV-Vis spectroscopy, X-ray diffraction

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Article Details

Year: 2013
Published on: 27 November, 2013
Page: [477 - 484]
Pages: 8
DOI: 10.2174/18779468113036660014
Price: $25

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