Control of Particle Size via Chemical Composition: Structural and Magnetic Characterization of Ni-Co Alloy Nanoparticles Encapsulated in Lamellar Mixed Oxides
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Конференция |
Workshop on Innovative Applications of Layered Materials: from Catalysis to Nanotechnology
01-02 сент. 2006
,
Alessandria
|
| Журнал |
Microporous and Mesoporous Materials
ISSN: 1387-1811
, E-ISSN: 1873-3093
|
| Вых. Данные |
Год: 2008,
Том: 107,
Номер: 1-2,
Страницы: 202-211
Страниц
: 10
DOI:
10.1016/j.micromeso.2007.05.026
|
| Ключевые слова |
Ferromagnetic resonance, Layered double hydroxide, Nanoparticles, Small angle X-ray scattering, Superparamagnetism |
| Авторы |
Tarasov K.A.
1,3
,
Isupov V.P.
1
,
Bokhonov B.B.
1
,
Gaponov Y.A.
1
,
Tolochko B.P.
1
,
Yulikov M.M.
2
,
Yudanov V.F.
2
,
Davidson A.
3
,
Beaunier P.
3
,
Marceau E.
3
,
Che M.
3
|
| Организации |
| 1 |
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, ul. Kutateladze 18,
Novosibirsk 630128, Russia
|
| 2 |
Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Lavtrentieva 5, Novosibirsk 630090, Russia
|
| 3 |
Laboratoire de Reactivite de Surface, UMR 7609 - CNRS, Universite Pierre et Marie Curie-Paris 6, 4 Place Jussieu, 75252 Paris Cedex 05, France
|
|
Информация о финансировании (3)
|
1
|
Министерство образования и науки Российской Федерации
|
2006-RI-111.0/002/110
|
|
2
|
Региональный общественный Фонд содействия отечественной науке
|
|
|
3
|
Minister of National Education Youth and Sport
|
|
Nanoparticles of Co–Ni alloys were prepared by thermal decomposition of layered double hydroxides (LDH) containing co-intercalated complexes of two metals. The precursor compounds [LiAl2(OH)6]2{Ni1xCox(EDTA)} Æ 4H2O (where EDTA is ethylenediaminetetraacetate) obtained by anion exchange from [LiAl2(OH)6]Cl Æ 1.5H2O were treated at 450 C in vacuum. The microstructure of the thermal products was studied using local (TEM, SAED, EDX) as well as integral (XRD, SAXS) methods. It was found that Ni–Co alloy nanoparticles are formed uniformly dispersed in the carbonized matrix of lamellar mixed oxides, and the increase of the relative cobalt content in Ni1xCox from x = 0 to 0.86 leads to gradual enlargement of the average alloy particle size from 9 to 16 nm. According to magnetic measurements by SQUID magnetometry and FMR, all alloys, except Ni0.14Co0.86, are superparamagnetic at room temperature. The results on particle size obtained by different techniques are in good agreement. The variation of nanoparticle
size via chemical composition in alloys and the use of LDH intercalation matrices is a promising way to synthesize
nanocomposites with target properties.