Synthesis and magnetic investigation of ordered mesoporous two-line ferrihydrite

被引：99

作者：

Tueysuez, Harun ^{[1
]}

Salabas, Elena Lorena ^{[1
]}

Weidenthaler, Claudia ^{[1
]}

Schueth, Ferdi ^{[1
]}

机构：

[1] Max Planck Inst Kohlenforsch, D-45470 Mulheim An Der Ruhr, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2008年 / 130卷 / 01期

关键词：

D O I：

10.1021/ja075528j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report here for the first time on the synthesis and characterization of ordered mesoporous two-line ferrihydrite. Ordered mesoporous ferrihydrite has been prepared via the nanocasting route. Two types of ordered mesoporous silica, two-dimensional hexagonal SBA-15 and three-dimensional cubic KIT-6, were employed as hard templates. The magnetic behavior of ferrihydrite replicas with an average diameter of about 7 nm was investigated by direct current magnetometry. The temperature dependence of magnetization shows a superparamagnetic transition around 70 K. Field-induced changes in the low-field behavior of the magnetization were observed below 30 K. The results are explained assuming a spinglass-like state of the surface spins. The 2D hexagonal two-line ferrihydrite showed very large coercivity up to 1.6 kOe at 5 K.

引用

页码：280 / 287

页数：8

共 45 条

[1] A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES
BECK, JS
VARTULI, JC
ROTH, WJ
LEONOWICZ, ME
KRESGE, CT
SCHMITT, KD
CHU, CTW
OLSON, DH
SHEPPARD, EW
MCCULLEN, SB
HIGGINS, JB
SCHLENKER, JL
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (27) : 10834 - 10843
[2] SPIN-GLASSES - EXPERIMENTAL FACTS, THEORETICAL CONCEPTS, AND OPEN QUESTIONS
BINDER, K
YOUNG, AP
[J]. REVIEWS OF MODERN PHYSICS, 1986, 58 (04) : 801 - 976
[3] Si incorporation into hematite by heating Si-ferrihydrite
Campbell, AS
Schwertmann, U
Stanjek, H
Friedl, J
Kyek, A
Campbell, PA
[J]. LANGMUIR, 2002, 18 (21) : 7804 - 7809
[4] Facile synthesis of high quality mesoporous SBA-15 with enhanced control of the porous network connectivity and wall thickness
Choi, M
Heo, W
Kleitz, F
Ryoo, R
[J]. CHEMICAL COMMUNICATIONS, 2003, (12) : 1340 - 1341
[5] CORNELL RM, 1998, IRON OXIDES STRUCTUR, V98, P2549
[6] The transformation of ferrihydrite into goethite or hematite, revisited
Cudennec, Y
Lecerf, A
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 2006, 179 (03) : 716 - 722
[7] STRUCTURAL MODEL FOR FERRIHYDRITE
DRITS, VA
SAKHAROV, BA
SALYN, AL
MANCEAU, A
[J]. CLAY MINERALS, 1993, 28 (02) : 185 - 207
[8] Large magnetic anisotropy in ferrihydrite nanoparticles synthesized from reverse micelles
Duarte, E. L.
Itri, R.
Lima, E., Jr.
Baptista, M. S.
Berquo, T. S.
Goya, G. F.
[J]. NANOTECHNOLOGY, 2006, 17 (22) : 5549 - 5555
[9] NEW DATA AND A REVISED STRUCTURAL MODEL FOR FERRIHYDRITE
EGGLETON, RA
FITZPATRICK, RW
[J]. CLAYS AND CLAY MINERALS, 1988, 36 (02) : 111 - 124
[10] Magnetic properties of synthetic six-line ferrihydrite nanoparticles
Guyodo, Y
Banerjee, SK
Penn, RL
Burleson, D
Berquo, TS
Seda, T
Solheid, P
[J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 2006, 154 (3-4) : 222 - 233

← 1 2 3 4 5 →