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

Autori
Mitar, Ivana ; Guć, Lucija ; Soldin, Željka ; Vrankić, Martina ; Paut, Andrea ; Prkić, Ante ; Krehula, Stjepko

Izvornik
Crystals (2073-4352) 11 (2021), 4; 383-400

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
microwave-assisted synthesis ; hematite ; α-Fe2O3 particles ; goethite ; α-FeOOH particles ; cetyltrimethylammonium bromide ; FT-IR spectroscopy ; powder X-ray diffraction ; FE-SEM

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA