Ultra Fast Hematite Preparation using a Microwave-Assisted Hydrothermal Method

Title:Ultra Fast Hematite Preparation using a Microwave-Assisted Hydrothermal Method

Volume: 3 Issue: 4

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 and Iêda Maria Garcia dos Santos

Affiliation:

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

Abstract: 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).

Cite this article as:

Silva Sonayra de Brito Arnayra, Andrade Maul de Jefferson, Casali Pereira Graziela, Lima Jackson Guedes de Severino, Longo Elson, Maia da Silva Ary, Keyson Dawy, Souza Gouveia de Antonio and Santos Maria Garcia dos Iêda, Ultra Fast Hematite Preparation using a Microwave-Assisted Hydrothermal Method, Current Physical Chemistry 2013; 3 (4) . https://dx.doi.org/10.2174/18779468113036660014