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Rapid Microwave Method for Synthesis of Iron Oxide Particles under Specific Conditions

Mitar, Ivana; Guć, Lucija; Soldin, Željka; Vrankić, Martina; Paut, Andrea; Prkić, Ante; Krehula, Stjepko (2021) Rapid Microwave Method for Synthesis of Iron Oxide Particles under Specific Conditions. Crystals, 11 (4). pp. 383-400. ISSN 2073-4352

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The advantages of microwave technology over conventionally conducted experiments are numerous. Some of them are reduction in reaction time, a higher degree of process control, repeatability, and work safety. Microwave synthesis routes require a complete description of the experimental details, instrumentation, and design program of a microwave oven used in the experiments. In this work, microwave-assisted hydrothermal synthesis of hematite (α-Fe2O3 ) particles from 0.1 M FeCl3 solution in highly alkaline media with heating in a microwave oven at continuous microwave emission of 800 W at 150 ◦C, 200 ◦C, and 250 ◦C for 20 min are presented. Also, the influence of the percentage of the addition of a cationic surfactant, cetyltrimethylammonium bromide (CTAB) on the composition, size, and shape of the final product was investigated. The samples precipitated at 150 ◦C formed a final product consisting of goethite (α-FeOOH) and hematite particles in contrast to the those precipitated at 200 ◦C and 250 ◦C where pure hematite phase was obtained. In these synthesis routes, the CTAB caused to slow down the rate of the goethite-to-hematite transformation process at temperatures at 200 ◦C but did not affect the transformation at 250 ◦C.

Item Type: Article
Uncontrolled Keywords: microwave-assisted synthesis ; hematite ; α-Fe2O3 particles ; goethite ; α-FeOOH particles ; cetyltrimethylammonium bromide ; FT-IR spectroscopy ; powder X-ray diffraction ; FE-SEM
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Materials Chemistry
Division of Materials Physics
Center of Excellence for Advanced Materials and Sensing Devices
Project titleProject leaderProject codeProject type
Razvoj novih membrana za ionsko-selektivne elektrode s dodatkom nanočestica metala i metalnih oksidaPrkić, AnteUIP-2017-05-6282HRZZ
Nastajanje i svojstva 1D a-Fe2O3 nanostruktura dopiranih odabranim metalnim ionimaRistić, MiraIP-2016-06-8254HRZZ
Depositing User: Martina Vrankić
Date Deposited: 27 Apr 2021 06:36
DOI: 10.3390/cryst11040383

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