TY - JOUR

T1 - Synthesis of superparamagnetic GdFeO3 nanoparticles using a free impinging-jets microreactor

AU - Albadi, Y.

AU - Sirotkin, A. A.

AU - Semenov, V. G.

AU - Abiev, R. S.

AU - Popkov, V. I.

N1 - Publisher Copyright: © 2020, Springer Science+Business Media LLC. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/7/1

Y1 - 2020/7/1

N2 - Gadolinium orthoferrite GdFeO3 nanoparticles were synthesized by co-precipitation of gadolinium and iron(m) hydroxides in a free impinging-jets microreactor followed by thermal treatment of co-precipitation products. According to X-ray diffraction, the co-precipitated hydroxides were X-ray amorphous, and the content of key elements within their composition corresponded to the stoichiometry of GdFeO3. Powder X-ray diffraction of the product of thermal treatment of hydroxides at 750 °C for 4 h indicated on the formation of GdFeO3 nanocrystals with a perovskite-like orthorhombic structure and an average crystallite size of 27±3 nm. Scanning electron microscopy showed that the gadolinium orthoferrite nanocrystals had an isometric morphology, and their specific surface area was determined by the Brunauer—Emmett—Teller method to be 13.55 m2g−1. Mössbauer spectroscopy and vibrational magnetometry showed that the obtained GdFeO3 nanoparticles were superparamagnetic and were characterized by a bimodal distribution of the effective field, indicating on their core—shell-type composite structure. The study of the composition, structure, morphology, and magnetic behavior of the obtained gadolinium orthoferrite nanoparticles showed that they can be used as a basis for contrast agents for magnetic resonance imaging (MRI).

AB - Gadolinium orthoferrite GdFeO3 nanoparticles were synthesized by co-precipitation of gadolinium and iron(m) hydroxides in a free impinging-jets microreactor followed by thermal treatment of co-precipitation products. According to X-ray diffraction, the co-precipitated hydroxides were X-ray amorphous, and the content of key elements within their composition corresponded to the stoichiometry of GdFeO3. Powder X-ray diffraction of the product of thermal treatment of hydroxides at 750 °C for 4 h indicated on the formation of GdFeO3 nanocrystals with a perovskite-like orthorhombic structure and an average crystallite size of 27±3 nm. Scanning electron microscopy showed that the gadolinium orthoferrite nanocrystals had an isometric morphology, and their specific surface area was determined by the Brunauer—Emmett—Teller method to be 13.55 m2g−1. Mössbauer spectroscopy and vibrational magnetometry showed that the obtained GdFeO3 nanoparticles were superparamagnetic and were characterized by a bimodal distribution of the effective field, indicating on their core—shell-type composite structure. The study of the composition, structure, morphology, and magnetic behavior of the obtained gadolinium orthoferrite nanoparticles showed that they can be used as a basis for contrast agents for magnetic resonance imaging (MRI).

KW - co-precipitation

KW - free impinging-jets microreactor

KW - gadolinium orthoferrite

KW - perovskites

KW - superparamagnetic nanoparticles

KW - FORMATION MECHANISM

KW - GDFEO3 NANOPARTICLES

KW - ORTHOFERRITE

KW - NANOCRYSTALLINE

KW - HEAT-TREATMENT

KW - BIFEO3

UR - http://www.scopus.com/inward/record.url?scp=85090112115&partnerID=8YFLogxK

U2 - 10.1007/s11172-020-2900-x

DO - 10.1007/s11172-020-2900-x

M3 - Article

AN - SCOPUS:85090112115

VL - 69

SP - 1290

EP - 1295

JO - Russian Chemical Bulletin

JF - Russian Chemical Bulletin

SN - 1066-5285

IS - 7

ER -